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Jamis DXT A3 Step-Over

Jamis DXT A3 Step-Over
$619.99 - $699.99
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Community wide delivery and installation is now available on all residential fitness equipment and bicyles. You may select this option at check out. We highly recommend having our expert staff deliver fitness equipment. Fitness equipment is also availble for pick up. Bicycles and cycling accessories may also be picked at any of our locations by choosing that option at check-out.


The dual-sport DXT's are pumped-up, go-anywhere/do-anything versions of our Allegro fitness bikes. With more gearing range to take on steeper hills and tougher terrain. Wider tires with a trail-capable tread for access to more riding areas, both paved and packed. And disc brakes and suspension forks for real off-road exploration and off-pavement adventure

The advantages of disc brakes over rim brakes on a versatile bike like the DXT far exceed their sole disadvantage, weight gain. Besides their incredible power and modulation, they're just plain safer, especially in the rain. Once rims get wet or muddy, using friction to stop the wheel at its circumference is less efficient than using friction to stop a less wet or muddy small diameter disc near the center of the wheel from rotating. And eliminating the rim from braking surface duties results in a longer lasting wheel.


Geometry Chart:
TT EFFECTIVE 21.93 / 557 21.93 / 557 22.44 / 570
HT ANGLE 70° 70.5° 71.5°
ST ANGLE 73.5° 74 ° 73.5°
CHAINSTAY 17.32 / 440 17.32 / 440 17.32 / 440
WHEELBASE 41.61 / 1057 41.61 / 1057 41.46 / 1053
FORK RAKE 1.57 / 40 1.57 / 40 1.57 / 40
BB DROP 2.36 / 60 2.36 / 60 2.36 / 60
HEADTUBE 4.92 / 125 5.16 / 131 5.31 / 135
STANDOVER 25.24 / 641 26.14 / 664 26.06 / 662
STACK 24.88 / 632 25.20 / 640 25.51 / 648
REACH 14.80 / 376 14.96 / 380 15.12 / 384


Frame Size Specific Design 6061 aluminum with fast back rear triangle, 1 1/8" head tube, internal cable routing, chain stays disc brake mounts, 34.9mm seat tube, kickstand mount, replaceable derailleur hanger, fender/rack eyelets and ring lock mount eyelets. Slacked headtube angle .5°
Fork SR/Suntour NVX-DS, aluminum lowers, coil spring, 28mm stanchions, 1-1/8" steerer, 75mm travel
Wheels Alex TD26 disc specific double wall alloy rims, 32H, alloy disc hubs with QR and 14g stainless steel spokes
Tires CST Dual Sport Tire, 700 x 42c
Bottom Bracket Sealed cartridge, 68 x 122.5mm
Crankset Forged alloy crank with chain guard, 48/38/28T, 170mm
Shifters Shimano Rapid Fire SL-EF500, 2-speed
Front Derailleur Shimano TY510 top swing
Rear Derailleur Shimano TY300
Cassette/Freewheel SunRace CSM40, 7-speed, 12-34T
Chain KMC Z7
Brakes Tektro MD-280 cable-actuated disc brakes with 160mm stainless 6-bolt rotors and Shimano EF41 levers
Handlebars Jamis Riser bar, double-butted aluminum, 25.4 x 10° sweep x 20mm rise x 640mm (14-18"), 660mm (20")
Tape/Grips ERGO Type Grip
Stem Jamis Trekking, 3D forged alloy, 15° rise, Length-60mm
Headset Internal Cup, threadless, 1 1/8"
Seatpost Jamis alloy micro-adjust, 31.6 x 350mm alloy clamp with QR seatpin
Saddle NEW Jamis Touring Femme with SL cover
Pedals Platform style

* Subject to change without notice.