Skip to main content

Locally Owned and Operated since 2007 - Home of Tax-Free Shopping

Middletown, DE

Filter By:

  • Show More Brands

  • Show Fewer Brands
  • Show More Sizes
  • Show Fewer Sizes

Pumps/Inflation

$35.00
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
$34.95
Topeak's Mini Dual DX is constructed of lightweight aluminum and sports a grippy Kraton and plastic handle for easy pumping. And, their thumb-lock SmartHead ensures an airtight seal on both Presta and Schrader valves.
$149.00
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
$51.99
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
$8.99 - $99.99
Planet Bike's line of CO2 replacement cartridges makes tire repairs quick and easy. - Planet Bike's CO2 cartridges work in Planet Bike inflators as well as most competitors' inflators. - Planet Bike cartridges are tested to the highest standards for durability, safety, and reliability. They contain pure CO2 with no oils or contaminants. - 100% recyclable steel cartridges - All threaded cartridges are compatible with Air Kiss, Red Zeppelin, Red Zeppelin 2 & Air Smith CO2
$74.95
Being elite means making no compromises when pursuing perfection...everything matters. Mounting your gear in a position to minimize drag is just one tip for performance. The Tri-BackUp Elite is specifically designed for saddles with angled rear rails. - Material: CNC aluminum - Hydration Capacity: One or two bottles (up to 750cc each) - Compatibility: Ninja TC Road, Ninja Pouch+ Road Ninja CO2+ Tri-Cage series - Mount: V rail section of saddle Compatible with CrMo, Ti, & Carbon rails - Max Load: 2.5 kg / 5.5 lb - Added Features: 1 Micro AirBooster and 2 16g CO2 cartridges included - Angle adjustable - Size: 8.6 x 7.6 x 7.4 cm / 3.4” x 3” x 2.9” - Weight: 102 g / 3.60 oz (Total) 88 g / 3.10 oz (w/o Inflator Bracket)
$69.99
- Mid-volume steel barrel and piston with composite matrix base - Precision 3.5-inch gauge (100 psi / 6.89 bar) - Extra long, high-strength hose - Varnished wood handle - ABS1 Pro with Presta/Schrader valve chuck
$16.95
Pssstttt. Tired of hearing that when you disconnect your shock pump? Well, hear it no more thanks to Topeak's Pressure-Rite. It's a must have for suspension fanatics as its ingenious design prevents air loss when adjusting shock and fork pressure. It's also available in a Presta version, perfect for disc wheels.
$26.99
Lezyne's ABS Pen Gauge is a replacement flex hose with an integrated, in-line psi/bar pressure gauge with easy to read markings. It is stored inside the handle of Flex Hose equipped Lezyne hand pumps (Medium and Large sizes only, sold separately), and is equipped with the ABS Flip Thread Chuck which threads onto Presta and Schrader valves for a secure connection.
$29.95
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
$19.99
Lezyne's easy-to-use Trigger Speed Drive CO2 is super compact and portable. Its simple triggered operation lets you control exactly how much CO2 you're putting into your tires. Plus, it's press-on Presta compatible head is super fast to use and works with all threaded cartridges.
$4.95
Mounting kit for Mini Morph and Road Morph G.
$49.99
Innovative 2-in-1 cycling CO2 dispenser and tubeless tire repair kit simultaneously inflates and seals tubeless tires. Machined aluminum construction is both lightweight and highly durable. Hardened steel reamer scours hole, inserts plug, and inflates tire for an efficient and rapid repair. CNC-machined twist knob manually controls release of CO2 gas. Aluminum canister holds the five included tire plugs and safely stores the reamer when not in use. High-quality tire plugs aggressively seal holes that are too large to be sealed by sealant alone (hole size varies from tire to tire). Sleek, compact design fits in a pocket or straps to your bike with a simple Velcro strap. Note: Sealing performance may vary based on puncture size, tire size, and tire pressure. - Compact tubeless tire repair kit. - Machined aluminum storage tube doubles as a handle. - Combined tire reamer and insertion tool. - Includes five tire plugs. - CO2 cartridges sold separately.
$34.99
Compact and super-efficient high-volume bike hand pump featuring a knurled barrel for superior grip while pumping. Its proven engineered design with an overlapping handle is constructed from machined aluminum, with superior durability, minimal weight, and all of the style. The integrated ABS Flex Hose is Presta and Schrader valve compatible and greatly improves pumping action and ergonomics. This mini pump is completely rebuildable and made with the best materials available. With up to 90 PSI (6.2 BAR) of pumping power, the Grip Drive HV is excellent for all-mountain bikes and gravel bikes. Includes a lightweight Composite Matrix frame mount. - Max pressure: 90 PSI | 6.2 BAR - Small: 186mm | 119g - Medium: 231mm | 134g
$49.99
The Pocket Drive HV is an incredibly compact and lightweight high-volume bike hand pump featuring impressive pumping efficiency for large tire applications, e.g. gravel or mountain bikes. It's constructed from durable CNC-machined aluminum and has a knurled barrel for slip-resistant operation. 90 PSI max.
$82.00
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.
$9.99 - $49.99
CO2 replacement cartridges Planet Bike's line of CO2 replacement cartridges make tire repairs quick and easy. - Our CO2 cartridges work in Planet Bike inflators as well as most competitors' inflators - Planet Bike cartridges are tested to the highest standards for durability, safety and reliability. They contain pure CO2 with no oils or contaminants. - Note - unable to ship CO2 to Canada - 100% recyclable steel cartridges - All threaded cartridges are compatible with Air Kiss, Red Zeppelin, Red Zeppelin 2 & Air Smith CO2. - All 16g cartridges are compatible with the Airship 2.0.
$19.99
- 24mm aluminum barrel is lightweight and durable - Locking T-handle for maximum pumping efficiency - Reversible head works on both Schrader/Presta valves - Large 1.5" gauge with easy-read face - Designed for fast inflation to 60 psi, pressure rated to 100 psi - Includes mounting bracket - Rebuildable - Length: 11 inches - Weight: 160 grams
$59.95
The Topeak JoeBlow III continues the tradition of setting the benchmark for floor pump durability and performance while ushering in upgrades with an enlarged 3-inch chronograph-inspired gauge and hammer-style TwinHead DX pump head. A durable steel barrel and base as well as an ergonomic padded handle make inflating tires a breeze. - Presta / Schrader / Dunlop-compatible - Max 160psi / 11bar - Volume per stroke: 317.5cc - 3.7lbs / 1.68kg - Ball and bladder needles included
$29.95
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
$39.95
Topeak's Mini Morph is the perfect answer for riders who've had trouble deciding if they want a frame or floor pump. The Mini Morph is both! For maximum pumping power, it features a high-volume aluminum barrel, a fold-out base, a long hose and a T handle. A frame mount is included, too.
$17.59
Easy to use, easy to control and affordable. The Mircoflate Nano gives you the best bang for your buck when it comes to quality and ease of use. Simply thread on your favorite CO2 cartridge, twist the cartridge off slightly to engage inflation and tighten it back on to shut it off. Petite power! - Compact and nearly indestructible - Easy to use and fully controllable - Patented twist-to-inflate technology - Press on to both Schrader and Presta valves - Compatible with 16 gram, 20 gram and 25 gram threaded CO2 cartridges Product includes: (1) Microflate Nano inflator head (1) threaded 20 gram CO2 cartridge
$165.00
A lightweight aluminum adapter allows the use of a Schrader pump on Presta tubes.
$29.99
Lezyne's convenient Twin Kit includes their Twin Speed Drive CO2 inflator, two CO2 cartridges, a couple tire levers and a Velcro strap to keep it all together. Its aluminum head is compatible with both Presta and Schrader valves, and uses a simple twisting action for easy inflation. And, it accepts all threaded CO2 cartridges.
$49.99
CO2 replacement cartridges Planet Bike's line of CO2 replacement cartridges make tire repairs quick and easy. - Our CO2 cartridges work in Planet Bike inflators as well as most competitors' inflators - Planet Bike cartridges are tested to the highest standards for durability, safety and reliability. They contain pure CO2 with no oils or contaminants - 100% recyclable steel cartridges - All threaded cartridges are compatible with Air Kiss, Red Zeppelin, Red Zeppelin 2 & Air Smith CO2 - Unable to ship to Canada
$39.99
Crank Brothers Klic HP sports a revolutionary design that has a hidden flexible hose hidden inside the pump body. A magnetic head and twisting collar allow the hose to be attached easily and keeps debris out. - High-pressure portable hand pump with hidden magnetic hose - Premium pump with flexible rubber hose to allow for easy inflation. - Features include a Presta/Schrader valve adapter, magnetic head with twisting collar, and a folding and locking handle. - HP (high pressure) version recommended for tires 45c and narrower. - All Klic pumps come with a bottle cage bracket mount. - Length 220mm - Pressure 120psi / 8.3bar - Weight: 115 grams
$12.00
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.
$30.00
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.
$8.00
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.
$8.00
Replacement gasket for reversible brass chucks, modern Impero Frame Pumps, and Pocket Impero
$8.00
Replacement gasket for the SILCA HIRO Chuck
$9.99
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.
$35.99
Keeping your bike's tires properly inflated is the best way to ensure a happy ride. Maintain pressure and avoid pinch flats with MSW AirLift Floor Pumps. - Dual head works on both Presta and Schrader valves - Steel Barrel with durable composite base - Max pressure: 150 psi - 32-inch long hose - 2.5-inch diameter gauge - On-board inflation adapter kit for toys, balls & rafts - Overall height: 25-inches
$47.95
The Roadie TT Twin Turbo is a full-metal, pocket-sized mini pump that transfers larger air volume from a bigger diameter outer chamber into a smaller diameter inner chamber to deliver more air at higher pressures to fill tires 50% faster and easier. Integrated dust cap keeps pump head clean and thumb lock lever ensures an air-tight seal. - Head: Presta with integrated dust cap - Barrel / Thumb Lock / Handle: Aluminum - Capacity: 160psi / 11 bar - Volume Per Stroke: 41.4cc - Side mount bracket - Size: 19.5 x 3.3 x 2.35cm / 7.7" x 1.3" x 0.9" - Weight: 100g / 3.53oz
$54.99 - $56.99
Lezyne's Micro Floor Drive HV is a powerful mini-pump that thinks it's a floor pump. Its fold-out foot peg, high-volume barrel and aluminum construction make it easier than ever to pump up to maximum pressure of 90psi and get back on the trails. You'll also appreciate the ergonomic handle, extra-long hose and Presta/Schrader-valve compatibility.
$39.95 - $49.95
Coil hose made is USA is superior to imported coil hoses. Rated for high pressure and durability. Brass swivel ends on both ends of the hose. Standard 1/4” NPT threads. Narrow hose increases strength and reduces waste when using Nitrogen. Short length hose recommended when your inflation source is close to your work or is portable and is usually moved to your work. Great for Nitrogen and small portable Air Compressors. Vibraseal coated threads, no thread tape or sealant needed!
$29.99
Lightweight and easy to use, MSW’s Jetstream adjustable inflator head works with all 3/8" threaded inflation canisters and allows you to vary the CO2 flow to avoid overfilling your tires. - Adjustable airflow with a convenient shut-off feature - Easily pushes onto Presta or threads onto Schrader valve tubes - Knurled knob for reliable grip even with mittens or gloves - Kit comes with inflator head, 38g cartridge, and foam sleeve
$79.95
A micro-sized tubeless tire repair and inflation kit featuring an advanced 2-in-1 CO2 injector head that repairs a puncture and inflates the tubeless tire in one step with massive air or can simply be used as a traditional CO2 inflator via the valve stem. The inflator head is compatible with both Presta and Schrader valves and the included velcro strap attaches to seatposts, saddle rails, or frame tubes and can carry one or two threaded 16g or 25g CO2 cartridges. - Advanced press type CO2 inflator, one 25g CO2 cartridge, stainless steel 2-in-1 tire reamer/plug insertion tool, plug retainer, and disc insertion spacer - CNC aluminum inflator head fits Presta / Schrader valves - Repair plug compartment, velcro strap, dust cap - Adjustable velcro strap mounts to seatpost, bike frame
$35.00
Prestacycle introduces the new Prestaflator Mini. A new tool for Bicycle tire inflation designed for quick and easy one-handed inflation of bicycle tires.
$24.99
A spring-loaded, push-on inflation system compatible with all 3/8-inch threaded compressed gas cartridges and works for Presta or Shrader valves. - Press-on for both Presta and Schrader valves - Compact, lightweight and durable - Compatible with standard 3/8-inch threaded compressed gas cartridges - CNC-machined AL-6061 - Kit comes with two 20-gram CO2 cartridges
$69.95
Air up your mountain bike tires in a hurry with Topeak's Joe Blow Mountain floor pump. Its large diameter steel barrel, sturdy composite base and oversized padded handle make inflating high volume tires an easy task. For versatility, its double-sided TwinHead pump head tightly grips both Presta and Schrader valves. And, you'll appreciate the easy-to-read gauge.
$34.95
Topeak's Pocket Rocket DX II boasts an aluminum construction for superb function, durability and max pump power. And, its aluminum thumb-lock head fits both Presta and Schrader valves.
$37.95
Upgrades any pump to a SmartHead pump head. Includes hardware, 40-inch hose, and SmartHead pump head.
$209.95
The king has returned to rule! The new JoeBlow Ace DX features an innovative three-stage design that achieves both high pressures and high volume in record time. Stage one opens both barrels for big volume to reach 60 psi with 30% less effort than standard floor pumps. Stage two uses the main barrel only for pressures up to 120 psi while stage three engages the small barrel to achieve an amazing 260 psi. Two tone padded handles, wide stable base and new 4” base mounted analog gauge make inflation easy. The new SmartHead DX1 automatically adjusts to fit Presta and Schrader valves without swapping parts and the lower profile air release button makes getting the right pressure easy. Includes ball and air bladder type inflation needles. - SmartHead DX1 full metal pump head w/ air release button & x-long hose - Gauge: 260 psi / 18 bar; 4” base mount analog - Base: Aluminum/Rubber - Barrel: Anodized aluminum - Handle: Oversize dual tone - Weight: 2.45 kg / 5.4 lb - Size: 74 x 28 x 22 cm/29.1” x 11” x 8.7”
$25.99 - $27.99
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 all 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 (sold separately)
$27.29
- Telescoping hand pump with integrated 30mm, 160psi gauge - Smart head is compatible with Schrader and Presta valves - Plastic handle unfolds into a T-handle for ease of use while pumping - Bracket included
$15.79
• Presta and Schrader valve compatible head • Hose and head kit fits most floor pumps
$4.19
Replaces worn end on any pump hose. - Head Type: Schrader
$6.29
- Genuine Sunlite replacement hose - Type: Fits Sunlite #4301 : 16 5.8mm
$5.99
- Genuine Sunlite replacement hose - Type: Fits Sunlite #4301 : 16 5.8mm"
$32.19
• High-flow steel barrel • 160 PSI high pressure pump • Sturdy base and Ergonomic T- handle • Schrader valve w/ thumblock & presta adapter • EZ Read gauge
$33.99
Genuine Innovations' AirChuck Elite offers Push-To-Inflate technology for fast, easy & controllable single-handed CO2 bicycle tire inflation! • Cartridge compatibility: 12, 16, 20, 25 gram threaded CO2 cartridges & Big Air! (not 45-gram cartridges) (each sold separately) • All metal aluminum design • Easy to use and fully controllable • Push-to-Inflate technology • Works with both Presta and Schrader valves • Includes one 16 gram and one 20 gram threaded CO2 cartridge • Weight: 16 grams
$57.95
The world’s first CO2 inflator with tire gauge provides tire-inflation and tire-pressure measurement. The angled head fits Presta and Schrader valves and a special feature allows the user to adjust the flow while filling the tire. Dual-end design allows for one-cartridge storage. - CO2 inflator that features a gauge as well - Flow is adjustable using special feature - Compatible with both Presta and Schrader valves - Presta/Schrader with integrated dust cap, Push to inflate - Gauge: Reads 160 psi / 11 bar, 1-1/2” analog - Engineering-grade polymer - Weight: 45g /1.59 oz - Size: 6.5 x 5.2 x 3.3 cm / 2.5” x 2” x 1.3” - Accepts threaded cartridges - CO2 cartridges sold separately
$19.99 - $21.99
CNC machined aluminum dispenser with brass internals. Trigger Valve Operation for easy and controlled inflation. Twin Chuck head threads on to Presta and Schrader valves. Neoprene sleeve insulates hand from cold during discharge. Compatible with threaded CO2 cartridges. Includes one 16g cartridge. - Weight: 26g - Aluminum, a strong, lightweight, and durable material, is used to make various precision CO2 inflator components - CNC machined aluminum parts for precise and durable construction - Press on/off valve operation functions like a trigger, providing easy and precise inflation - Lezyne's ABS Flex Hose threads directly onto the valve for a secure, airtight connection. Compatible with Presta, and Schrader valves
$99.95
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.
$17.00
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.
$29.95
The longest and slimmest version in the DA pump series fills high-pressure road tires fast. Dual-Action (DA) doubles volume with each stroke and inflates tires to 120 psi / 8 bar. Integrated dust cap keeps pump head clean and thumb lock lever insures air-tight seal. Specs - HEAD: Presta with integrated dust cap - BARREL / THUMB LOCK: Aluminum - HANDLE: Plastic - CAPACITY: 120 psi / 8 bar - VOLUME PER STROKE: 66.9 cc (pull + push) - SIZE: 25.8 x 3.2 x 2.8 cm / 10.2” x 1.3” x 1.1” - WEIGHT: 118 g / 4.16 oz Added Features - Dual-action pumping head - Side-mount bracket
$51.99
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
$30.00
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.