Pumps/Inflation

The JoeBlow Sport with unique 2-stage design delivers both high pressure and high volume in record time. Stage one opens both barrels for huge volume, reaching 30 psi with 30% less effort than standard floor pumps. Stage two utilizes the small barrel for pressures up to 160 psi. Hammer type TwinHead DX5 pump head with an extra-long and tangle-free hose makes it easy to reach valve stems. A durable steel barrel and large steel base provide extra stability. - Head: Hammer type TwinHead DX5, Presta / Schrader / Dunlop valves with extra-long 360 pivot hose - Barrel: Painted steel / anodized aluminum - Gauge: 160 psi / 11 bar, 3" mid mount analog Stage 1 : 0 - 30 psi Stage 2 : 30 - 160 psi - Volume Per Stroke: 715cc (Stage 1), 258cc (Stage 2) - Handle: Oversize / Dual density polymer - Base: Hardened steel - Ball / bladder heads, Hose dock - Size: 74 x 26.6 x 18cm / 29.1" x 10.5" x 4.6" - Weight: 2.5kg / 5.51lb

The aero-shaped barrel and wide steel base provide stability when pumping and the 3” top mounted gauge is easy to read up to 200 psi (14 bar). The large padded handle provides comfort while the extra-long and tangle-free hose can even reach wheels on bikes mounted in a stand. The SmartHead DX3 with lower-profile air-release button automatically adjusts to fit either Presta or Schrader valves and makes getting the right pressure a simple task.

An easy-to-read top-mounted digital gauge with rubber bumper impact protection delivers accurate tire pressure readings up to 200psi / 14bar. The large padded handle provides comfort while the wide steel base keeps everything stable. The extra-long hose can even reach bikes mounted in a work stand. The SmartHead DX3 automatically adjusts to fit Presta or Schrader valves and a new lower-profile air-release button allows fine tuning of tire pressure while preventing unintended pressure release. - Head: SmartHead DX3 w/ air release button & extra-long hose - Barrel: Painted steel - Gauge: 200 psi / 14 bar, Top mounted digital (Tolerance : < 100 psi ± 1 psi / > 100 psi ± 1%) - Unit: psi, bar, kg / cm² - Battery: CR2032 x 1 (included) - Volume Per Stroke: 337cc - Handle: Oversize padded / Dual density polymer - Base: Hardened steel - Cushioned rubber for digital gauge protection, auto off, Dunlop valve adapter, Presta valve adapter, Ball / bladder heads, Hose dock - Size: 73.5 x 25.5 x 16.4cm / 28.9" x 10" x 6.5" - Weight: 1.97kg / 4.34lb

Replacement UHP head O-ring seal

Will fit Specialized Sport/Comp/HP floor pumps from 2010 - present.

Rebuild kit for the MTB floor pump. - Compatible with Air Tool MTB floor pump. - Includes O-ring, lube, and grommet.

Rebuild kit for our most common Air Tool floor pumps. - Compatible with Air Tool Pro, Comp, and Sport floor pumps. - Includes O-ring lube and grommet.

Keep your Air Tool Pro floor pump working fantastic with this replacement head and hose.

90 Degree twist style mini CO2 head used on SWAT products - Twist design allow CO2 cartridge to be threaded into head and then unthreaded to start CO2 flow. - Flow can be controlled or stopped by threading cartridge back into head. - Includes plastic spacer that allows head to be mounted for storage on cartridge without piercing it.

This durable pump with SwitchHitter head automatically adjusts for Schrader or Presta valves. - SwitchHitter head works on Schrader or Presta valves with no disassembly. - Plunger locks to body chamber with a simple twist for secure storage. - Water bottle boss mount included. - Max pressure: 120psi (8.3bar) - Volume per stroke: 48.4cc

Small, efficient, reliable—the three key features of the Air Tool MTB Mini pump. With the inverted dual chamber design, this pump moves 20% more air per stroke than the unit it replaced, yet is 10% smaller. - Inverted dual chamber design is smaller yet moves 20% more air per stroke when compared to our previous design, reducing pumping time by up to two minutes. - Twist locking head is easily converted to fit Presta or Schrader valves. - Machined outer barrel for extra grip while pumping. - Aluminum inner and outer chamber for durable performance. - Water bottle boss frame mounting bracket included. - Max pressure: 60 PSI (4.1bar) - Volume-per-stroke: 55cc - Water bottle boss frame mounting bracket included.

This durable frame pump with SwitchHitter head automatically adjusts for Schrader or Presta valve tubes and shows pressure on a rotatable gauge. - SwitchHitter head works on Schrader or Presta valves with no disassembly. - Gauge body rotates for easy viewing. - Durable plastic barrel with aluminum shaft to reduce flex and improve efficiency. - Plunger locks to body chamber with a simple twist for secure storage. - Water bottle boss mount included. - Max pressure: 120psi (8.3bar) - Volume per stroke: 48.4cc

Get the convenience of CO2 inflation in a super-small pump that can be carried anywhere with Specialized's Cpr02 Pump. This little inflator boasts speedy, controlled inflation with the power of compressed CO2 and uses threaded cartridges

The best road mini pump does two things well—it inflates tubes quickly, and it stashes easily. The reliable Air Tool Road Mini pump moves almost twice as much air as its predecessor, thanks to its inverted dual chamber design. It gives you total peace of mind on days when pesky flats catch you off-guard. - Inverted dual chamber design is smaller yet moves 58% more air per stroke when compared to our previous design, reducing pumping time by up to four minutes. - Presta-only head with updated dust cover prevents pump from opening due to vibration. - Machined outer barrel for extra grip while pumping. - All-aluminum inner and outer chamber for durable performance. - Water bottle boss frame mounting bracket included. - Max pressure: 100 PSI (6.9 bar) - Volume-per-stroke: 30cc - Volume-per-stroke: 30cc - Water bottle boss frame mounting bracket included.

- Head/Hose for Air Tool UHP pump

The Air Tool Flex MTB/Road uses an inverted chamber design that allows for quick fill-up on mountain tires but can still reach the high pressures needed for road tires. - Twin Schrader and presta thread on T-head - Inverted barrel design allows for efficient high volume and high pressure pumping - Lightweight and compact hose with built-in flex to prevent excess stress on valve stems - Water bottle boss mount included

The Air Tool MTB pump is Speialized's most dependable and durable big-volume frame pump. It's intended to be carried on the bike for use in all off-road conditions. You'll find that it features a new inverted design, so it greatly increases air capacity, which reduces pump time by up to two minutes. - All new inverted, double chamber design increases the air handling capacity by 28% compared to our previous design, reducing pumping time by up to two minutes. - Twist locking head reduces size and can be easily converted to fit Presta or Schrader valves. - Machined outer barrel for extra grip while pumping.. - All-aluminum inner and outer chamber for durable performance. - Water bottle boss mount included. - Max pressure: 60 PSI (4.1bar) - Volume-per-stroke: 100cc

The Air Tool Road is a minimalistic frame pump that provides efficiency and reliability for high-pressure road tires. - All new, inverted double chamber design increases the air handling capacity by 25% compared to our previous design, reducing pumping time by up to two minutes. - Presta-only head keeps size and weight to a minimum while the dust cover keeps the insides clean. - Machined outer barrel for extra grip while pumping.. - All-aluminum inner and outer chamber for durable performance. - Water bottle boss mount included. - Max pressure: 100 PSI (6.9 bar) - Volume-per-stroke: 60cc

Designed for Fat and Semi Fat tire bikes, the Big Bore packs massive volume per stroke and a unique head that still works with winter gloves on - Oversized press-on Schrader and Presta head won't accidentally remove valve cores and can be easily used with thick gloves. - Flexible hose attachment allows for aggressive pumping without fear of damaging valve stems. - Inverted barrel design allows for high volume in a compact size. - Coarse machined aluminum barrel for extra grip. - Water bottle boss mount with elastomer band included. - Max pressure: 50psi (3.5bar) - Volume per stroke: 90cc

Specialized's Air Tool Sport Floor Pump boasts all-steel construction, durable internals, a long hose, a sturdy handle and a three-sided base for easy pumping and excellent stability. You also get Specialized's SwitchHitter head that automatically adapts to fit Presta and Schrader valves, and an easy-to-read, 2-inch gauge to make dialing in the right pressure a breeze.

The easiest way to use CO2. - Gauge confirms proper inflation, making it easy to adjust pressure mid-ride. - Thumb trigger gives precise control. - Accommodates threaded 16g and 25g cartridges. - One 16g CO2 cartridge included.

Thanks to its smaller-diameter barrel, with Specialized's Air Tool HP Floor Pump it's easier than ever to inflate high-pressure tires. It also features Specialized's SwitchHitter head that works with Presta and Schrader valves, quality steel construction for excellent durability, and a three-sided base for superb stability. Plus, you'll love the comfortable, wide handle, easy-to-read oversize gauge and the nice, long hose.

Tune your suspension to perfection wherever you are with Specialized's Air Tool Shock Pump. It's easy to get exact pressures with the dial gauge and the micro air bleed button. Plus, the compact design means it will easily fit in your hydration pack.

Everybody needs a floor pump in their home, but not just any floor pump will do. You need something that's dependable, versatile, and accurate, like our new Air Tool Comp. It checks all the boxes with a dual-stage pressure gauge that delivers the low-pressure accuracy that your mountain bike tires require, while also matching the high-pressure needs of your road and gravel tires. At 365cc-per-stroke, it might not match the MTB floor pump, but this one fills big tires fast and makes for a great all-arounder that’ll get you out the door and riding—fast. - Dual-scale 3" (76mm) oversized gauge. - Steel base and aluminum barrel construction. - Ergonomic wing handle is now overmolded for comfort. - Auto-selecting SwitchHitter II head technology. - Includes spare rubber seal for head. - Max pressure: 120 PSI (8.3bar) - Volume-per-stroke: 365cc

Back by popular demand, the Air Tool MTB Floor Pump is better than ever. Designed for low pressure, high volume tires, it provides precise pressure to ensure that your tires are set up for whatever the trail throws at you. - Oversized 3" (76mm) gauge has 0-40 PSI range for maximum resolution when filling large tires. - Massive 508cc volume aluminum barrel pushes enough air to seat tubeless tires. - Ergonomic Wing handle with pressure relief valve. - Auto selecting SwitchHitter II technology. - Includes spare rubber seal for head. - Max pressure: 40 PSI (2.7bar) - Volume-per-stroke: 508cc

Specialized's Air Tool UHP Floor Pump makes it easy to dial in your fork and shock. With a cast aluminum base and an aluminum barrel, this sturdy floor pump reaches 350psi with ease. What's more, the micro air bleeder makes it easy to set the perfect pressure.

16g CO2 Canister from Specialized.

25g CO2 Canister's from Specialized.

Replacement gasket for reversible brass chucks, modern Impero Frame Pumps, and Pocket Impero

The Iconic SILCA 24.1 gasket is the heart of the press-on Presta chuck. The current 242 gasket utilizes a high tech and very red, fully synthetic elastomer base material.

If you have a SILCA PISTA made since 1946, a SUPERPISTA since 1989, or any of the Impero Frame Pumps since 2015, it has a check valve assembly like this to ensure that air can only go in one direction

This chuck comes from the same vendor who supplied them to SILCA pumps for more than 25 years. It makes a great replacement or addition if you are buying a new Stainless Presta chuck or CP1 Disc Adapter for your older pump. This part is made from nickel-plated brass and uses an o-ring to seal the connection. - Hose barb fits into all SILCA hoses both old and new - Threads onto Schrader valves and all SILCA chucks with male Schrader threads (17-4 Presta chuck, HIRO, and CP1 Disc Adapter) - All metal construction, nickel-plated brass

n partnership with the rubber and tire experts at Continental , we are offering a custom extruded 3/16" ID air hose compatible with all historic PISTA Handles.

The factory replacement for SILCA Press on Disc Chucks. The 252 replace the classic SILCA 25.1 gasket after more than 20 years in the market. This unique gasket borrows from industries which require air-tight seals in the harshest of environments. The 252 gasket utilizes a high tech, full synthetic elastomer base material. It tests to a life expectancy of more than 5X the carbon filled rubber or Buna-N materials used previously. In tests with a major disc wheel manufacturer, the current SILCA Disc Wheel Adapter with 252 gasket excelled by posting a blow-off pressure of 393psi where other designs were unable to reach 120psi. Older versions of the SILCA Disc Wheel Adapter will still benefit for the new gasket, but have a lower hands-free max pressure.

Years ago while Josh was working with the Team CSC at the Dauphine Libere, he noticed one of their mechanics using the most amazing little chuck to manage the disc wheel inflation. Unlike anything he had seen before, it was all metal and used a 'lollipop' lever on the side to lock onto the valve stems in disc wheels. The mechanic explained that these were made in Japan and were coveted by all the Euro-Pro mechanics due to their scarcity. So Josh set out to improve the design and make it available to cyclists everywhere. - Full metal construction, guaranteed for 25 years and covered by SILCAShield - Can effectively seal on valve stems as short as 10mm! - Uses SILCA 254 High-Tech Elastomer gasket - Adjustable gasket pre-load allows for a custom fit on any valve as well as compensation for gasket wear - Male Schrader thread fits into any Schrader chuck, or use SILCA Thread-On Schrader Adapter to fit a bare hose - Bullet-proof high-pressure, disc-compatible chuck for high-pressure situations.

Tattico is a highly efficient mini-pump with an ergonomic design that makes it easy to use in all conditions. - Tattico has 4 unique features: - Inverted Design: Tattico is designed backwards from most pumps. The hose and valving is hidden inside the inner tube rather than the outer cylinder delivering up to 10% more air per stroke compared to pumps of similar length. - Adaptable Cup Seal: Other pumps seal with o-rings which lose effectiveness as friction heat increases. The Tattico Adaptable Cup Seal grows with the tube, resulting in ultimate efficiency at all temperatures. - Hidden Heat Sink: There is a heat sink hidden at the end of the barrel which absorbs a high percentage of the heat generated when pumping. This keeps the rest of the pump cool, even at high pressures. - Twin Tube Insulated Grip: Tattico handle uses 2 thin tubes separated by an insulating air gap to keep hands cool. This results in better grip and control without risk to hands even when inflating multiple tires to high pressures. - 6061 Alloy barrel and gripping surfaces - High-efficiency piston design - Long extractable filler hose with locking Presta/Schrader chuck - 120psi - 9-1/2" length - Includes direct-mount bracket with retaining strap

Replacement gasket for the SILCA HIRO Chuck

Originally designed in the 1950s when the Bianchi-Pirelli team requested a pump that could fit under the rear seat of the Fiat team car, the Pista pump quickly became an icon of professional team cars and mechanic workstations at 6-Day track events around the world. The compact form of the pump, and the ability to lay completely flat, allow the pump to take up minimal space in a trunk, duffel bag, or larger tool kit, making it a true icon of the sport amongst the cycling cognoscenti. In 2017, we took all of the qualities of the original Pista and introduced a re-engineered, limited-edition version of the pump with the iconic Molteni orange barrel to celebrate 100 years in business. These modern orange pumps were initially meant to be a limited-release product to celebrate our heritage, but the positive response and demand for the product have continued. As we're now in our second century of making high-performance pumps, we're pleased to make Pista part of our permanent floor pump line-up and will offer it in a modern red livery moving forward. - Durable, high-strength steel barrel - Compact ash wood handle with hose guides - High-efficiency SILCA leather piston assembly - Brass check-valve assembly - Long filler hose with integrated Schrader chuck - Push-on alloy Presta chuck with bleeder valve - Rated to 220psi

Pista Plus is a floor pump that's built to outlast the rest of your cycling equipment. The durable steel barrel, 3mm-thick leather plunger piston design, combined with our proprietary brass air bridge and check-valve assembly ensure unrivaled longevity. The smaller-diameter barrel matched with the superior pumping efficiency of our classic 28mm 731 model Italian leather piston gasket and self-lubricating linear bearings means that Pista Plus is capable of easily reaching pressures up to 220 PSI. Pista Plus features a three-footed aluminum base and a full-size lathe-turned ash handle. The chuck dock on Pista Plus secures the chuck at the Schrader chuck allowing the rider to swap the standard chuck out for our HIRO chuck or Disc Wheel Adapter while retaining the ability to secure the hose to the pump. The large 64mm gauge is accurate to 2% and features a high-contrast face design. - Durable, high-strength steel barrel - Full-size lathe-turned ash wood handle with hose guide - High-efficiency SILCA leather piston assembly - Brass air bridge and check-valve assembly - 2% Accurate, heavy-duty 2.5" (64mm) gauge rated to 220PSI - Integrated Schrader chuck plus press-on alloy Presta chuck with Bleeder valve

With specifications more akin to a suspension fork than a traditional pump, the SuperPista combines a full metal shock piston design with the classic Italian leather plunger washer and self-lubricating linear bearings to create the highest-efficiency, smoothest-running SuperPista to date. Efficient, accurate, durable are the trademarks of the SuperPista floor pump. - High-mount digital gauge accurate to 1% with backlight, adjustable pressure alarm, and adjustable pressure units (uses two CR2032 batteries) - Full-size Ash wood handle with a secure carrier strap - High-efficiency 28mm SILCA leather piston assembly - Brass air check-valve assembly - Alloy barrel with plated steel piston shaft - Long filler hose with integrated Schrader chuck - Hiro locking-lever Presta chuck with a magnetic dock - Rated to 220psi

While "good enough" gets the job done, there is beauty in going above and beyond. The SILCA SuperPista Ultimate is the pinnacle of what a floor pump can achieve. From the highly accurate analog gauge to the magnetic HIRO dock to the lathe-turned Purpleheart wood handle, this floor pump embodies the SILCA mantra of passion, precision, performance. - Full Stainless Steel, Aluminum, Wood and Brass Construction—NO PLASTICS - SILCA Lifetime PLUS Shield Warranty—the most comprehensive warranty in all of Cycling - Ergonomic Purpleheart wood and Investment Cast Stainless Steel Handle - Full IGUS Linear Bearings for Ultimate Smoothness - Thick Full Grain Leather Piston Gasket—More Efficient and Durable than Rubber! - 1% Gauge Accuracy allows for Ultimate Ride Tuning

Bag of 3 replacement washers for EVA heads on all SKS floor pumps

Easily adapts schrader only air compressors, floor pumps, and mini pumps to work with presta valves

- Aluminum housing - Integrated pressure control regulator - Dust protection cap - Compatible with 16-gram and 24-gram threaded CO2 cartridges - Includes replacement 16-gram cartridge, water bottle clip, and 2-point pump holder - Presta and Schrader compatible

The Airchecker from SKS is a fast and easy way to check your tire pressure. The swiveling head makes it a snap to reach your presta or schrader valve stem at any angle, and the backlit display with extra-large LED digits is always easy to read. This gauge measures up to 144 psi and reads in 10ths of psi.

Airflex Explorer Mini Pump is a small pump with great impact. The hose, stored in the pump tube, screws onto the valve head. Flexible hose prevents damage to valve stem during inflation. Pump handle is soft, easy-to-grip compound. Great pump for MTB or urban bikes. Small enough to fit in jersey pocket, but also includes a frame mount. - Inflates to 5 bar/73 psi - Compatible with Presta, Schrader, and Dunlop Valves - Includes a holder which attaches at cage mount - Length: 205mm - Weight: 132 grams - Made in Germany

Airflex Racer Mini Pump is a small pump with great impact. The hose, stored in the pump tube, screws onto the Presta valve head. Flexible hose prevents damage to valve stem during inflation. Pump handle is soft, easy-to-grip compound. Great pump for high-pressure tires. Small enough to fit in jersey pocket, but also includes a frame mount. - Inflates to 8 bar/115 psi - Compatible with Presta and Dunlop Valves - Includes a holder which attaches at cage mount - Length: 196mm - Weight: 105 grams - Made in Germany

SKS's Rennkompressor Floor Pump is a legend. For over four decades, this German work of art has been the go-to pump for countless cyclists the world over. The E.V.A. head works with all valves and the 230 psi/16 bar max pressure can fill even the highest quality track tubulars. Sturdy aluminum construction, an oversize gauge, and a long hose will make it your go-to pump, as well.

The digital update of the tried-and-tested Airstep foot pump impresses with a high-quality, precise digital gauge. The black LED display shows the pressure perfectly in bright orange numerals. The first-class sensor technology with a deviation tolerance of up to 1.5% guarantees a high measuring accuracy, thus ensuring optimum tire-pressure adjustments. Another innovation is the powder-coated aluminum foot pedal. Thanks to its scratch-resistant coating, it not only offers high-impact resistance, it also impresses with its modern black appearance.

Keep your suspension pressure dialed-in with RockShox's High-Pressure Fork/Shock Pump. It features an aluminum barrel with an ergonomic handle, a handy finger-tap bleed adjust button for fine-tuning settings, and a large gauge. The hose swivels 360-degrees to fit anywhere.

RockShox simplifies your pack with this HP 2-Stage Air Pump. Throw it in your pack for every ride and you have both a shock and tire pump that boasts a 300psi capacity. The aluminum construction makes it super durable and the head fits both presta and Schrader valves. A large removable gauge is easy to read and the air-release button makes fine tuning pressure in shocks and tires a breeze. And it includes a mounting clip to mount to water bottle bosses.

Keep your suspension pressure dialed-in with RockShox's High-Pressure Fork/Shock Pump. It features an aluminum barrel with an ergonomic handle, a handy finger-tap bleed adjust button for fine-tuning settings, and a large gauge. The hose swivels 360-degrees to fit anywhere. And it handles an astounding 600 psi max.

Get accurate and precise results every time with RockShox's High-Pressure Digital Fork/Shock Pump. It features an aluminum barrel with an ergonomic handle, a handy finger-tap bleed adjust button for fine-tuning settings, and a large digital BAR/PSI readout. It runs off one CR2032 battery (included) and the hose swivels 360-degrees to fit anywhere.

Problem Solvers 90 degree Presta valve inflator is used to inflate disc wheels, thanks to its narrow, low-profile head. • Presta valve • 90 degree inflator works with most pump heads

Prestacycle's newest version of the Presta Head Gasket uses Urethane Elastomer. It’s softer and stronger. It lasts more than 5 times longer, gives a better seal and flexes to work anywhere along the Presta shaft for better tubeless tire application.

Prestadapter is a lightweight Presta-to-Schrader adapter with one more great feature. The hole on the opposite side is a Presta valve core remover! Super-light Anodized Aluminum. - Schrader to Presta valve adapter - Presta valve core tool - Forged alloy single piece precision machined body - Only 1.3 grams actual weight each - Two (2) adapters included

Prestacycle's new Mini Angle Presta Head has more room to fit into more wheels. It includes their newest version of the Mini Presta Head Gasket using Urethane Elastomer. It’s softer and stronger. It lasts more than 5 times longer, gives a better seal and flexes to work anywhere along the Presta shaft for better tubeless tire application.

Smaller Head fits every known Disc wheel made. Includes Prestacycle's newest version of the Mini Presta Head Gasket uses Urethane Elastomer. It’s softer and stronger. It lasts more than 5 times longer, gives a better seal and flexes to work anywhere along the Presta shaft for better tubeless tire application.

It’s back, the Pro’s favorite! Perfect for Tubeless tires, valve extenders and any Presta valve. It includes Prestacycle's newest version of the Mini Presta Head Gasket using Urethane Elastomer. It’s softer and stronger. It lasts more than 5 times longer, gives a better seal and flexes to work anywhere along the Presta shaft for any Presta application. Prestacycle's design engages the Presta valve just below the cap threads and requires less insertion. Deep head adapts to a wide variety of applications including valve extenders. The head is now very easy to get on and off. This head is a MUST for Tubeless tire users. Allows high-flow inflation with the valve core removed for seating tires. PUSH on / PUSH off – the fastest way to get you going. Made with nickel-plated 6061-T6 alloy – Strong as Brass and only 1/3 the weight. It’s also compatible with Silca pumps and can be adapted to other pump brands with our optional Schrader barb or our floor pump replacement hose. Patent-pending 2-way connector screws onto the Prestaflator threaded connector or directly clamps to a hose.

The new Standard in light, reliable inflation! Prestaflator Micro is a superlight CO2 inflation head and more! We've combined technologies to make a head 33% lighter than any other major brand, and provides secure, leak-free connection with the greatest possible inflation control! The Cartridge is the flow control Knob The best way to inflate CO2 is with a variable flow knob. The bigger the knob, the better the flow control. Prestacycle introduces it's revolutionary design – the Cartridge is the Knob! Save weight, size and complexity with our design. Secure, no-loss connection. Prestaflator Micro uses a threaded Presta / Schrader head. Secure attachment with a perfect seal insures you don't loose any CO2. 100% of the cartridge contents will go towards inflation Easy operation You can install the cartridge first, or put the head on the valve first. Prestaflator Micro works perfectly either way. When you screw the cartridge onto the head – NO CO2 will flow. There is no-loss from installing the cartridge. To inflate, Slightly un-screw the cartridge, and inflation begins. The more you unscrew, the faster it flows. Works great – even for seating tubeless tires. If you close the cartridge again, flow stops completely. If you leave the cartridge on, it will retain the contents for an extended period of time. Specifications: - 33% Lighter and smaller than any major brand - The Cartridge is the Knob! - Turn Cartridge (instead of a knob) for precise flow control - Secure Presta / Schrader Threaded head prevents loss - Only 12 grams weight! - Precision Machined alloy for long life - Compatible with CO2Pump for a 48 gram total Pump option! - Compatible with our Compressor Adapter for unlimited inflation!