Pumps/Inflation

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.

Topeak's Road Morph G is the perfect answer for riders who've had trouble deciding if they want a frame or floor pump. The Road Morph is both! For maximum pumping power, it features a high-volume aluminum barrel, a fold-out base, a long hose with built-in gauge and a T-handle. Of course, it fits Presta and Schrader valves and a frame mount is included, too.

Planet Bike's Dial Gauge makes it easy to ensure you always have the right pressure in your tires, which makes the riding easy and helps prevent flats. Built to last, this quality gauge works on all valves and has a large easy-to-read dial.

Topeak's SmartGauge D2 boasts a digital readout that goes up to 250 psi and it's compatible with Presta and Schrader valves, as well as shocks and suspension forks. The head rotates 180 degrees to get in tough spots, and an air release button helps you dial in the perfect pressure.

You'll have a whole lotta love for this CO2 inflator on long rides. It fits Presta and Schrader valves and weighs next to nothing. The cartridge is insulated with a sleeve to prevent frozen fingers and the small size means the Red Zeppelin fits easily in bags, pockets and packs. Two 16-gram cartridges are included. Now you'll never be stuck like a "Fool in the Rain."

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

Topeak's Pocket Rocket boasts an aluminum barrel for superb function, durability and max pump power, while its plastic handle ensures pumping comfort. And, its aluminum thumb-lock head fits both Presta and Schrader valves.

Park Tool's Micro Pump is a super small micro pump that fits in just about any bag or jersey pocket or mounts directly to the frame. Ideal to take along when space and weight are an issue. Aluminum barrel with a locking dual head and soft-touch dual-density flip out handle. - Presta and Schrader valve compatible - Maximum pressure: 100 psi / 7 bars - Weight: 3.7 ounces (105g) - Length: 7 7/8" (200mm) - Includes mounting hardware to securely attach to water bottle bosses or under bottle cage

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.

Mountain TT Twin Turbo pump fills both large volume fat bike tires and higher pressure MTB tires, as well as gravel bike tires with ease. TwinTurbo technology uses both strokes to compress air to deliver high pressure output and saves time and effort. Integrated dust cap keeps pump head clean and thumb lock lever ensures air-tight seal. Specs - HEAD: Presta / Schrader / Dunlop with integrated dust cap - BARREL: Aluminum - THUMB LOCK / HANDLE: Plastic - CAPACITY: 120 psi / 8 bar - VOLUME PER STROKE: 90.9 cc - SIZE: 22 x 5 x 4 cm / 8.7” x 2” x 1.6” - WEIGHT: 192 g / 6.77 oz Added Feature - Side mount bracket

Lezyne's easy-to-use Alloy Drive CO2 is super compact and portable. Its simple twist operation lets you control exactly how much CO2 you're putting into your tires. Plus, its aluminum construction is lightweight, durable and easy on the eyes. What's more, the Alloy Drive is Presta/Schrader compatible, comes with an anti-freeze sleeve, and works with 16g threaded cartridges. - CNC machined aluminum dispenser with brass internals - CNC control knob twists for easy and controlled inflation - Twin Slip Chuck head presses on to Presta and Schrader valves - Neoprene sleeve insulates hand from cold during discharge - Compatible with threaded CO2 cartridges - Comes with one 16g cartridge

16g CO2 Canister from Specialized.

The Klic Floor Pump effortlessly adapts to your needs with a magnetic quick-connect interface. The hidden hose with integrated gauge stores neatly away in the pump body when not in use, and can be used separately as a standalone tire pressure gauge. The optional burst tank installs or removes in seconds, and can be used either separately or integrated for installing and inflating tubeless tires with ease. - Burst tank can be pressurized to install and inflate tubeless tires - Tank is removable for easy transport - Hidden hose stores neatly in the body of the pump

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

High-volume pump holds securely to bike frames and includes stable folding foot for on-the-go inflation ease. The pump with something to prove The Bontrager Mini Charger is a high-volume, frame-mountable bicycle tire pump that includes a long hose for ease and versatility. A practical folding foot stabilizes while you pump, for faster tire inflation. Product details - High-volume frame mount pump - Stable, folding foot for pumping ease - Long hose gives versatility and saves your valve stems

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

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

A reliable floor pump featuring a durable steel barrel, an auto-select head, and a stable base. Fresh air for your tires Nothing slows a cyclist down like an inappropriate amount of tire inflation. Loaded with features like a stable, tip-resistant base, a durable steel barrel, and an auto-select head, the Charger stands ready whenever your tires need a little boost. Product details - Steel construction and replaceable internals provide long-term durability - Auto-select head instantly fits both Presta and Schrader valves - Large, stable base minimizes tipping - Easy-to-read 3-inch base-mounted gauge - Max pressure 160 psi (11bar)

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 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.

Park's Vulcanizing Patch Kit includes 4 round patches for small holes and 2 oval patches for wider cuts; a tube of self-vulcanizing glue that bonds the patches to your tube super securely; and sandpaper for preparing the punctured area for gluing. The kit comes in a small plastic box to fit in your seat bag or pack.

Topeak's Peakini II is a powerful mini pump that's ideal for road and trail use. It sports a reversible head so you can pump both your Schrader and Presta valves with ease. And, its highly efficient, single action design and T-handle mean you'll be back out riding after a flat quicker than ever.

A versatile floor pump that allows for easy transition between high volume and high pressure settings. A pump for road and MTB The Dual Charger Pump is versatile floor pump with multiple pressure settings that let you easily inflate high-pressure road tires and larger volume hybrid and MTB tires. A quick flip of the switch moves between settings, making it perfect for riders who own both a road and mountain bike. Product details - Steel construction and replaceable internals provide long-term durability - Auto-select head instantly fits both Presta and Schrader valves - Large, stable base minimizes tipping - Easy to read 4-inch base-mounted gauge - Base-mounted switch allows for easy transition between high volume and high pressure settings - High volume setting allows for quick inflation - High pressure setting allows for easy inflation as PSI increases - Max pressure 160 psi (11bar)

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

25g CO2 Canister's from Specialized.

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

Lezyne's Micro Floor Digital Driver is their ultimate portable pump with an integrated, highly advanced digital gauge. Lightweight CNC-machined aluminum barrel, piston, base, and T-handle optimized either for high-pressure (160 psi max) or high-volume (90psi max) applications. Long, versatile hose improves pumping convenience. Stainless steel foot peg stabilizes pump during use. - ABS Flip-Thread Chuck equipped - Includes composite matrix frame mount

The high-pressure portable hand pump with hidden hose, pressure gauge, and co2 inflator. Details - Premium pump with flexible rubber hose that hides inside the body of the pump when not in use—perfect for those stealth air-strikes! - Features also include a concealed co2 inflator (Presta only), air pressure gauge, magnetic head with twisting collar, a folding and locking handle, and a Presta/Schrader valve adapter (fully threaded Presta valve bodies only) - Hp (high pressure) version recommended for tires 45c and narrower - All klic pumps come with a bottle cage bracket mount Specs - Length: 260mm - Pressure: 120psi/8.3bar - Warranty: 5 years - Weight: 170g

Buzzy's Pollinator Travel Shock pump's compact size and removable 300 psi gauge make it is the perfect choice for mechanics on the go.

Replacement gasket for the SILCA HIRO Chuck

Our Black Zeppelin CO2 bike inflator is ultra-lightweight, sleekly designed, and easy to use. It’s precision-machined for strength and reliability. The pierce indicator on the Airflation control knob lets you know when the cartridge has been punctured and the device is ready to inflate your bicycle tire. It accepts all types of threaded cartridges and works with Presta and Schrader valves without the need for an adaptor. It'll make quick and accurate work of road side repairs so stash it in your bike bag or jersey pocket and away you ride. - Precision-machined body and head for improved reliability and ease of use - CO2 pierce indicator reveals when CO2 cartridge is punctured and ready for use - Fits Presta and Schrader valves without adapters - Compatible with threaded cartridges - Small size fits in saddle bag or jersey pocket - Size: 45 x 32 x 21 mm - Weight: 24 grams (without CO2 cartridge)

Built and designed for bicycles, the INF-2 utilizes a redesigned, more durable, dual-sided, 360º rotatable Presta and Schrader head. The INF-2 also sports a new, lighter weight body and a redesigned trigger to facilitate multiple hanging options. It features a built in pressure gauge (0–160 psi, 0–11 bars) with a protective gauge boot, and the body accepts any 3/8" NPT male threaded fitting. Built for everyday shop use and 100% rebuildable!

Topeak's Joe Blow Sprint quickly inflates tires thanks to its durable aluminum barrel, a sturdy steel base, a tight-sealing aluminum thumblock head that fits Presta and Schrader valves and an oversized, padded handle. And, the easy-to-read, top-mounted gauge lets you dial in the perfect pressure every time!

Reach peak inflation pressure in a flash with Topeak's Peak DX II. Its butted-aluminum barrel and folding T-handle makes pumping up tires a snap! Plus, the thumb-lock SmartHead grips tight on both Presta and Schrader valves.

A Schrader valve adapter allows using the JoeBlow Ace floor pump for quickly pumping forks and rear shocks. Built-in air release knob allows fine tuning air pressure.

This pump is equipped with a hardened steel base, solid steel barrel, and an easy to read top mounted analog gauge. An extra long hose with a TwinHead pump head makes it easy to reach valve stems and the integrated mini tool carrier keeps what you need for light maintenance close at hand.

Easy-to-read digital gauge can be attached to a pump or used alone and provides accurate pressure readings up to 300psi / 20.7bar. Rotating head works with Presta, Schrader or Dunlop valves on bike / motorcycle / car tires, forks or shocks while the Thumb Lock lever ensures an airtight seal. The air release button allows fine tuning pressure. Specs - PUMP HEAD COMPATIBILITY: Presta / Schrader pumps - TIRE VALVE COMPATIBILITY: Presta / Schrader / Dunlop valves - GAUGE: Digital, 300 psi / 20.7 bar - UNIT: psi, bar, kg / cm2 - BATTERY: CR2032 x 1 (included) - THUMB LOCK: Aluminum - PRESSURE TUNING: Air release button - BODY: Aluminum / Engineering grade polymer - SIZE: 9.2 x 5.8 x 4.3 cm / 3.6” x 2.3” x 1.7” - WEIGHT: 102 g / 3.60 oz Added Features: - Rotatable head / gauge - Auto-off function

Big volume barrel while Dual-Action (DA) doubles volume with each stroke and inflates tires up to pressure fast. Integrated dust cap keeps pump head clean and thumb lock lever insures air-tight seal. Specs - HEAD: Presta / Schrader / Dunlop with integrated dust cap - BARREL: Aluminum - THUMB LOCK / HANDLE: Plastic - CAPACITY: 60 psi / 4 bar - VOLUME PER STROKE: 81.4 cc (pull + push) - SIZE: 22.3 x 4.6 x 3.4 cm / 8.8” x 1.8” x 1.3” - WEIGHT: 126 g / 4.44 oz Added Features - Dual-action pumping head - Side mount bracket

This clever dual-gauge floor pump was exclusively designed for low pressure Fat-Bike tires and moderate pressure MTB tires. A massive oversized barrel is 1.5 times larger than a standard floor pump and delivers large air volume to fill oversized tires quickly. A 30 psi (2 bar) gauge shows precise low pressure for Fat-Bike tires while the 75 psi (5 bar) gauge shows higher pressures for MTB tires. An air release button on the TwinHead™ allows for fine-tuning pressure.

- Attaches to air compressor to inflate tires in seconds - Designed with a variable rate trigger and a large, easy to read gauge - Spin-on Presta head with pressure release option and USA-made hose are included with Prestaflator - Prestaflator PLUS includes Schrader head and blower tip - Attachments are 6061-T6 alloy

The Kenai Outdoors Blast 2x pump offers the features and ease of use of a floor pump in a compact, easy to carry package. With folding foot pegs and t-handle, telescoping high volume barrel and flexible hose, the Blast 2x makes filling tires while on the road or trail easy. - Steel barrel with plastic fold out legs for stability - Shrader/Presta valve pump head - Includes bottle cage mount bracket - 10" hose

These threaded 16-gram cartridges can be used with all Genuine Innovations inflators that have a 3/8-inch-24 thread.

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.

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.

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

You'll ride with peace of mind when you pack a can of Vittoria's Pit Stop Tire Sealant. It contains pure latex foam sealant and compressed air to quickly inflate and repair your tire so you can get on with your ride. Available in three sizes for varying tire volumes: - Road Racing: inflates 21-28-inch tubulars up to 94 psi and 700c clinchers up to 87 psi so you can ride, instead of walk to the closest pump and top off the tire to full pressure. - 75mL: Repairs and inflates low-volume MTB tires in less than a minute. - 100mL: Repairs and inflates meaty 27.5-inch tires and cross country 29-inch tires in less than a minute.

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.

Replacement UHP head O-ring seal

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

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

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

This is a replacement hose for your Lezyne Micro Floor Digital Drive pump. It offers an integrated, highly advanced, inline digital gauge and ABS Flip-Thread chuck.

Portland Design Works' Ninja Pump puts the ancient arts of stealth and power in the palm of your hand. It is master of two fighting styles: Pump and CO2 inflator. It knows the way of the Schrader and Presta, and threads on to both for secure inflation. Like any highly-trained warrior, it excels under pressure, and can overcome even the most formidable 120psi tire. - Alloy construction  - Control knob easily regulates CO2 flow - Composite pump mount fits under bottle cage - Weight: 74 g (2.6 oz) - Length: 147 mm (5.75") - Lifetime PDWarranty

Portland Design Works' incredibly lightweight and compact Tiny Object CO2 Inflator efficiently fills flats. Use the control knob to dial in the perfect pressure while the included leather sleeve protects your hands from frosty CO2 cartridges. Its rugged alloy body is built to withstand years of road- and trail-side repairs. - Presta valve compatible - Control knob easily regulates CO2 flow - Full grain leather sleeve is vegetable tanned and conditioned with natural oils and waxes - Lifetime PDWarranty

It's a CO2 inflator! Constructed of durable alloy and composite, this price-point CO2 inflator is sure to save you on the side of the road. The oversize control knob makes for easy regulation of air flow. Comes with two 16g CO2 cartridges and a foam sleeve to protect your fingers from the frosty cartridge. - Oversize control knob regulates CO2 flow - Durable composite and alloy construction - Includes 2x 16g CO2 cartridges + 1 foam sleeve - Presta and Schrader compatible

High-pressure shock pump with gauge Our Shockmate 3.0 high-pressure bicycle suspension pump is designed to efficiently and accurately maintain your bike’s suspension to ensure that your shocks are neither too stiff nor too soft. It's compact and rugged and features an 8" swivel hose and alloy valve head for secure attachment and easier pumping. The easy-to-read gauge and bleeder valve help you fine-tune the suspension sag on your bike's front and rear shocks to give you the best ride performance. Whether you have a mountain bike with full suspension or just a fork shock, take the Shockmate 3.0 along on your next backcountry adventure. - Compact and rugged design is ideal for backcountry adventures - Locking T-handle for comfortable and efficient pumping at high pressure - 8" swivel hose and alloy valve head for secure attachment and easier pumping - 1.5" industrial grade gauge is precise and easy to read when setting suspension shock sag - Bleeder valve for fine-tuning pressure - Rebuildable - Length: 260mm - Weight: 149 grams

Lightweight plugs for tubeless tire punctures. When paired with Genuine Innovations' Tubeless Tackle Kit (#G20439) or Tubeless Repair Kit (#G2650), you can plug pesky punctures in seconds and cycle confident for many rides to come.

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!