The Zefal HPX largely used by road bike riders, is the successor to the Zefal HP frame pump. Unlike the HP model, the HPX doesn't require an "umbrella" clip mounted on the seat tube to retain it tightly on the bike frame. The HPX uses a spring mounted in the handle section of the pump's to expand the pump length so it fits tightly between the top of the frame's bottom bracket shell and below the top tube. On the HPX's air chuck are two non-marring, nylon plastic "feet" that fit against the B/B shell, and it has a concave nylon top that presses against the seat lug so your frame and its paint finish won't be damaged. The HPX's compression tube is made of aluminum alloy, with a textured Black plastic sleeve over the last five inches near the air chuck as a hand grip. The air chuck is forged aluminum alloy and has a thumb lock. The air chuck has a removable valve face plate so inner reversing parts can be changed to accommodate both Presta or Schraeder valve inflation, though it comes from the factory set for Schraeder valves. The plunger assembly, using the handle side plastic compression tube cap, unscrews from the compression tube, and includes the spring loaded handle, plunger shaft and piston. The plunger shaft is made of rolled steel tubing. The piston uses a plastic washer and cup-shaped rubber "leather" which are crimped onto the end of the plunger shaft. The handle compressing the expansive tension spring is made of aluminum. The HPX has an unusual feature built into the handle. The nylon cap that butts against the seat lug is also a spring tension adjustor with two positions, HP or X. When the cap is turned to the "X" position, it is set for frame mounting and the spring permits the handle to compress over the pump body by 2 1/2". This is what permits the pump to adjust to different sized frames, yet hold the pump firmly in place. In the "HP" position, the spring is prevented from compressing so the pump can be used for inflation with a full throw on the pump stroke. To fit all frames correctly, the HPX is made in four numbered sizes ("1" is the smallest, "4" is the largest). The length of the compression tube and plunger shaft is sized to fit each frame size range. Consult the pump table for sizing, individual weights, and air compression capabilities. Remember the measurements will be from the center of the B/B shell to the center of the frames's top tube. We sell the HPX in Black with White lettering.
1-2-3-4 $ Price in Catalog
The Mt. Zefal Plus is created specifically for the mountain bike market. The "Mt. Plus" is a frame fit frame pump and relies on a spring permanently mounted in the pump handle to expand the pump's length so that it can "snap" into the frame between the bottom bracket shell and the bottom of the top tube at the frame's seat lug. The top of the handle is concave, and the bottom of the air chuck is designed to provide stable points of contact using plastic that won't damage your frame or its paint finish. For those who want to use the pump on more than one bike, a set of adjustable nylon pump pegs weighing 10 grams per pair are included, which will provide firm contact within retaining holes holding the pump even on a bouncy ride. The compression tube is made of a molded hard plastic, with a textured, Black, soft plastic sleeve over the last five inches near the air chuck as a hand grip. The air chuck is made of cast plastic as a separate piece and has a thumb lock. The thumb lock not only provides a tight seal around the inner tube valve stem, but when closed also forms the final air tight seal between the air chuck and the compression tube. The steel pin which holds the thumb lever to the air chuck also holds the air chuck to the compression tube. The air chuck has a removable valve face plate so reversing inner parts can be changed to accommodate both Presta or Schraeder valve inflation, though it comes from the factory set for Schraeder valves. An air chuck valve hole plug, made of soft plastic, is included, which is tethered from a leash beneath the removable face plate. The plunger assembly, using the handle side plastic compression tube cap, unscrews from the compression tube, and includes the spring loaded handle, plunger shaft and piston. The plunger shaft is made of rolled steel tubing. The piston uses a plastic washer and cup-shaped rubber "leather" which are crimped onto the end of the plunger shaft. The handle housing the expansive tension spring is made of hard plastic. To fit all frames correctly, the Mt. Plus is made in five sizes with the length of the compression tube and plunger shaft sized to fit each frame size range. Consult the pump table for sizing, individual weights, and air compression capabilities. Remember the measurements will be from the center of the B/B shell to the center of the frames's top tube. The Mt Plus comes in Black with White and Red lettering. These have been replaced by the Double Shot Frame-Fit pump. We sold them for $16.99
The Mt. Zefal HP Trail is another frame fit pump for the mountain bike market, and it has many functional similarities to the Mt. Plus even though visually it is different. Like the Mt Plus the "Mt. Trail" uses a spring permanently mounted in the handle to extend the pump's length under pressure so it firmly between the B/B shell and the top tube at the seat lug. The points of bike contact are styled to maximize frame contact for a firm hold. It also comes with a pair of the same pump pegs, weighing 10 grams per pair, so the Mt. Trail can be securely held on bumpy trail and has holes at both ends for their use. The compression tube is molded of hard plastic, with a textured, Black, hard plastic sleeve over the last 4 1/2" near the air chuck, as a hand grip. The hand grip is glued in place to form a compression tube end cap. The air chuck is molded of plastic as a separate piece, and has a thumb lock. The thumb lock not only provides a tight seal around the inner tube valve stem, but when closed, also forms the final air tight seal between the air chuck and the compression tube. The steel pin which holds the thumb lock to the air chuck is also the means which holds the air chuck to the compression tube. The air chuck has a removable valve face plate so inner reversing parts can be changed to accommodate both Presta or Schraeder valve inflation, though it comes from the factory set for Schraeder valves. An air chuck valve hole plug, made of soft plastic, is included which is tethered from a leash beneath the removable face plate. The plunger assembly, using the handle side plastic compression tube cap, unscrews from the compression tube, and includes the spring loaded handle, plunger shaft and piston. The plunger shaft is made of rolled steel tubing. The piston uses a plastic washer and cup-shaped rubber "leather" which are crimped onto the end of the plunger shaft. The handle housing the expansive tension spring is made of hard plastic. To fit all frames correctly, the Mt. Trail is made in three sizes with the length of the compression tube and plunger shaft sized to fit each frame size range. Consult the pump table for sizing, individual weights, and air compression capabilities. Remember the measurements will be from the center of the B/B shell to the center of the frames's top tube. The Mt. Trail comes in Black with White and Red lettering. This pump was wisely killed off in the marketplace after the first year, when US importers passed on selling them any further. When still available they sold for $14.99
The Double Shot is Zefal's frame fit double action pump. It uses a second compression tube within the primary compression tube, that compresses air with the "out" or "up" stroke of the pump. Because the secondary or inner compression tube is smaller than the larger outer one that houses it, a smaller volume of air is compressed on the "out" stroke than it does on the "in" or secondary stroke. The Double Shot uses an internal expansive spring like the Mt. Plus and Mt. Trail to hold it in place on the bike between the top of the B/B shell and the bottom of the top tube at the seat lug. The points of contact are styled to maximize the frame contact for a firm hold. The Double Shot like the Mt. Plus and the Mt. Trail comes with a pair of nylon adjustable pump pegs weighing 10 grams, so the pump can be mounted on a frame that it's not necessarily sized correctly for. The outer compression tube is made of hard plastic with a 5" long textured surface sleeve that serves as a handle and seems to also be a compression tube end cap. This outer sleeve has three small holes in its end which serve as air draw holes during the "out" stroke. The expansive spring for frame fit purposes is housed internally at the base of this handle section. The plunger assembly on the Double Shot isn't easily removable because of the inner compression tube and a set of necessary seals to make both compression tubes air tight in use. The inner compression tube also functions as the plunger shaft and is made of aluminum tubing. A second 5 1/2" long molded plastic grip is attached to the plunger shaft and air chuck is fastened at the end of this grip. The air chuck is made of cast plastic as a separate piece, and has a thumb lock. The thumb lock not only provides a tight seal around the inner tube valve stem, but when closed, also forms the final air tight seal between the air chuck and the compression tube. The steel pin which holds the thumb lock to the air chuck is also the means which holds the air chuck to the compression tube. The air chuck has a removable valve face plate so inner reversing parts can be changed to accommodate both Presta or Schraeder valve inflation, though it comes from the factory set for Schraeder valves. To fit all frames correctly, the Double Shot is made in five sizes with the length of the compression tube and plunger shaft sized to fit each frame size range. Consult the pump table for sizing, individual weights, and air compression capabilities. Remember the measurements will be from the center of the B/B shell to the center of the frames's top tube. The Double Shot comes in Black with Silver lettering.
Black >S - M - L - XL - XXL $ Price in Catalog
In our discussion of Zefal's HPX, Mt. Zefal Plus, and Zefal Double Shot frame pump we have spoken of frame fit mounting between the B/B shell and top tube as though it were going to be mounted on the front side of the seat tube. There are instances, like when you have braze-on bottle cage fittings on the front of your seat tube, where you don't want to mount a pump, in favor of a bottle. For these instances Zefal has a mounting plate, the Doohicki, designed to permit you to mount those three models of their pumps to the rear of the seat tube. Using the Doohicki requires that there be a hole drilled, front to back through the chainstay bridge on your frame. The chainstay bridge is the horizontal tube joining the chainstays just behind your bottom bracket shell. The Doohicki bolts to the bridge through the hole using contoured adapters, cantilevering toward the B/B shell. Two tabs are cast into the air chuck on these pumps that fit squarely and securely into the Doohicki at the bottom. At the top of the pump, a pump peg may be used. The Doohicki has a cap which fits into the valve hole of the pump, tethered on a tiny leash to prevent dirt from getting into it. The Doohicki and all it's parts are made of molded plastic and has a total weight of 9 grams. It doesn't come with the needed steel bolt to fasten it to the bridge.
The Mini Double Shot is a single action mini pump for bottle cage mounting. The Mini Double Shot uses the "Double Shot" name but doesn't employ double action compression tube techniques that are found in the Double Shot frame pump. The "out" stroke of the Mini Double Shot compresses no air through the air chuck. The Mini Double Shot however does use second inner "telescoping" compression tube which enhances the total volume of air that the "in" stroke will eventually compress. The inner tube extends out of the outer compression tube on the out stroke 5 1/4", while the plunger shaft extends out of the inner compression tube an added 4 1/2" bringing the total length of the pump extended to 18" from its original 8 1/4". The inner compression tube is made of molded plastic with internal threads at the grip end. The air chuck end of the inner tube has a molded spout with a hole in it for air to exit into the outer tube. Over this spout is a cup shaped rubber "leather" which forms the air tight seal as the inner tube slides against the outer tube's inner wall. The plunger assembly slides within the inner tube, and is easily removable by unscrewing it from the grip end of the inner compression tube. The plunger shaft is made of steel tubing. The piston uses a plastic washer and cup-shaped rubber "leather" which are crimped onto the end of the plunger shaft. The handle is made of molded hard Black plastic and seems to be tightly press fit onto the plunger shaft. The air chuck is made of cast plastic as a separate piece, and has a thumb lock. The thumb lock not only provides a tight seal around the inner tube valve stem, but when closed, also forms the final air tight seal between the air chuck and the compression tube. The steel pin which holds the thumb lock to the air chuck is also the means which holds the air chuck to the compression tube. The air chuck has a removable valve face plate so inner reversing parts can be changed to accommodate both Presta or Schraeder valve inflation, though it comes from the factory set for Schraeder valves. An air chuck valve hole plug, made of soft plastic, is included which is tethered from a leash beneath the removable face plate. The Mini Double Shot comes with two tight fitting snap-in holders that are held by the water bottle cage braze-on bolts, beneath the cage so you can mount both cage and pump. The Black nylon molded clips contour the frame tube and hold the pump by the handle and body securely. The clips weigh 12.5 grams per pair, while the Mini Double Shot weighs 93 grams, and we found that 1 stroke of the pump delivered 65ml of air. It took us 176 strokes to bring a Dart HC to 40 PSI on a Mavic 231 rim, and 282 strokes to bring a 700 x 25c Continental SuperSport Ultra on a Mavic Open 4 CD up to 90 PSI.
The Mini Double Shot HP is in essence the same pump as above, but the compression tubes and the plunger shaft are now made of aluminum alloy. The diameter of both the inner and outer tube has been made smaller, bringing down the total volume of air per stroke. Importantly, while the plunger assembly and the inner compression tube unscrewed for repair in the Mini Double Shot, in the HP model both of these sections are permanently installed because of a special crimp in the tube which holds the end in, making it un-serviceable The handle and the grip section are made of molded plastic. The air chuck is made of cast plastic as a separate piece, and has a thumb lock. The thumb lock not only provides a tight seal around the inner tube valve stem, but when closed, also forms the final air tight seal between the air chuck and the compression tube. The steel pin which holds the thumb lock to the air chuck is also the means which holds the air chuck to the compression tube. The air chuck has a removable valve face plate so inner reversing parts can be changed to accommodate both Presta or Schraeder valve inflation, though it comes from the factory set for Schraeder valves. An air chuck valve hole plug, made of soft plastic, is included which is tethered from a leash beneath the removable face plate. The Mini Double Shot HP comes with two tight fitting snap-in holders that are held by the water bottle cage braze-on bolts, beneath the cage so you can mount both cage and pump. The Black nylon molded clips contour the frame tube and hold the pump by the handle and body securely. The clips weigh 11.5 grams per pair, while the Mini Double Shot HP weighs 94.5 grams, and we found that 1 stroke of the pump delivered 70mm of air. It took us 248 strokes to bring a Dart HC to 40 PSI on a Mavic 231 rim, and 259 strokes to bring a 700 x 25c Continental SuperSport Ultra on a Mavic Open 4 CD up to 90 PSI.
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