Jamis ALLEGRO A3 Step-Over Frame 2025
2025 Urban
Estimate price |
539$
Weight | 12.25 kg 
Bike details
Overview
Key information split into simple groups.
Bike summary
-
-
Frame Aluminum -
Groupset Tourney -
Suspension Rigid -
Drivetrain 3 × 7 -
Brakes Promax Rim
Parts list
Components
Main components, grouped by system.
Bike components
Frame
Frame
Size Specific Design 6061 aluminum with fast back rear triangle, internal cable routing, hydro-formed top and down tube, taper gauge “S” bend stays, kickstand mount, replaceable derailleur hanger and fender/rack eyelets
Suspension Fork
Hi-Ten tapered straight blade unicrown with bulge butted steerer, low-rider carry mounts and forged dropouts with 2 fender eyelets
Drivetrain
Rear Derailleur
Shimano RD-TY300
Front Derailleur
Shimano FD-TY510 top swing
Shift Levers
Shimano EZ-Fire Plus ST-EF500 shifters, 21-speed
Cassette
Shimano CS-HG200, 7-speed 12-32T
Crank
Forged alloy, 48/38/28T, 170mm with chain guard
Bottom Bracket
VP sealed cartridge, 68 x 122.5mm
Chain
KMC Z51
Pedals
Platform style, steel cage/resin body
Wheels
Rims
Double wall alloy rims, 32H, alloy hubs with QR and 14g spokes
Tires
Kenda Eurotrek K-197, 700 x 35c
Brakes
Brakes
Promax TX-121 linear-pull with front power modulator and Shimano levers
Cockpit
Stem
Jamis alloy hi-rise, quill type, 35 ? rise, 80mm extension, 180mm high, 150mm (14-16”), 180mm (18”)
Handlebar
Jamis Riser bar, aluminum, 25.4 x 10 ? sweep x 40mm rise x 600mm
Grips
Anatomic double density kraton
Headset
Internal cup threaded, 1 1/8”
Seat
Saddle
NEW Jamis Touring Women’s with SL cover
Seatpost
Jamis alloy micro-adjust, 27.2 x 350mm, alloy clamp with QR seatpin
Fit data
Geometry
Numbers for sizing and ride feel.
| Size | 14" | 16" | 18" |
|---|---|---|---|
| Stack Reach Ratio | 1.343 mm | 1.389 mm | 1.437 mm |
| Front Center | 614 mm | 614 mm | 614 mm |
| Rake | 48 mm | 48 mm | 48 mm |
| Trail | 69 mm | 69 mm | 70 mm |
| Stack | 533 mm | 546 mm | 559 mm |
| Reach | 397 mm | 393 mm | 389 mm |
| Top Tube Length | 560 mm | 560 mm | 560 mm |
| Seat Tube Angle | 73 ° | 73 ° | 73 ° |
| Seat Tube Length | 356 mm | 406 mm | 457 mm |
| Head Tube Angle | 71 ° | 71 ° | 71 ° |
| Head Tube Length | 113 mm | 126 mm | 140 mm |
| Chainstay Length | 440 mm | 440 mm | 440 mm |
| Wheelbase | 1048 mm | 1048 mm | 1048 mm |
| Bottom Bracket Drop | 57 mm | 57 mm | 57 mm |
| Standover Height | 622 mm | 642 mm | 645 mm |
| Wheels | 700 | 700 | 700 |