VelopediaBicycle Archive · Specification report

2021 Jamis HUDSON DISC Step-Thru

Velopedia Archive ID 900001720

Overview

Model year2021
BrandJamis
ModelHUDSON DISC Step-Thru
Bicycle typeHybrid
Archive ID900001720
Original MSRP$839.95
ColorsInk, Sugar Mint
Sizes14″ S/T; 18″ S/T

Frameset

Frame construction6061 TIG-welded aluminum, Hudson laid-back design with low ride height, alloy kickstand
Frame materialAluminum
ForkHi-tensile unicrown with radiused blades

Drivetrain

Component groupShimano Altus RDM-2000
ShiftersShimano Altus SL-M2010-9R, 9-Speed
Rear derailleurShimano Altus RDM-2000
CranksetForged alloy crank, single 40T chainring, 170mm, with full length chainguard
Bottom bracketSealed cartridge, 68 x 122.5mm
CassetteSun Race CSM90-9AW 11-36T
ChainKMC Z9
PedalsComfort platform with TPE non-slip insert

Brakes

BrakesTektro HD-M275 hydraulic disc brake

Cockpit & contact points

HeadsetInternal cup, threaded, 1 1/8”
HandlebarComfort hi-rise, alloy 25.4 x 80mm rise x 15 ̊ sweep x 640mm
StemJamis alloy, 180mm quill x 80mm extension
SaddleJamis Comfort with memory foam, synthetic suede top, burnished side panels and bumper springs
SeatpostAlloy micro-adjust, 31.6 x 300mm, with alloy QR clamp

Wheels & tires

WheelsAlex DC25 alloy double-wall rims, 36H, Formula alloy QR hubs, 14g black stainless steel spokes
Front tireCST Metropolitan Palm Bay, 27.5 x 2.35
Rear tireCST Metropolitan Palm Bay, 27.5 x 2.35
Wheel size27.5

Geometry · 14″ S/T

Effective top tube587 mm
Head tube165 mm
Head-tube angle68°
Seat-tube angle67°
Chainstay / rear center485 mm
Wheelbase1101 mm
Bottom-bracket height286 mm
Standover height466 mm
Fork offset / rake55 mm

Geometry · 18″ S/T

Effective top tube607 mm
Head tube185 mm
Head-tube angle68°
Seat-tube angle67°
Chainstay / rear center485 mm
Wheelbase1121 mm
Bottom-bracket height286 mm
Standover height488 mm
Fork offset / rake55 mm

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on September 14, 2026.