Velopedia Bicycle Archive

2021 Jamis Hudson Disc

Hybrid bicycle from the Velopedia specification archive.

Share owner experience

Selling this bike? Create a Bike History Report

What Velopedia knows

Model year
2021
Category
Hybrid
Original MSRP
$839.95
Sizes
17″, 19″, 21″
Colors
Ink, Rhino
Geometry
3 manufacturer sizes · Geometry context
Record coverage
22 preserved details · 3 archived images · original MSRP · preserved geometry
Archive ID
900001721
Campaign

Manufacturer catalog

Published sizes and colors

3 sizes · 2 colors

Manufacturer-published sizes and colors; availability and exact size/color pairings may vary by market or production run.

Published sizes

17″19″21″

Published colors

InkRhino

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

Size-specific frame data

Geometry

3 sizes · 9 measurements

Manufacturer-published geometry normalized for consistent archival comparison. Effective top tube and reach remain separate measurements because they describe different aspects of fit.

Measurement17″19″21″
Effective top tube597 mm627 mm648 mm
Head tube160 mm180 mm200 mm
Head-tube angle68°68°68°
Seat-tube angle67°67°67°
Chainstay / rear center485 mm485 mm485 mm
Wheelbase1111 mm1141 mm1162 mm
Bottom-bracket height286 mm286 mm286 mm
Standover height761 mm797 mm824 mm
Fork offset / rake55 mm55 mm55 mm

Geometry source: Jamis first-party geometry table (2021 GEO - HUDSON) ↗ Measurements can vary by configuration, wheel size, or flip-chip position where noted by the manufacturer.

Geometry tools

Analyze a published size

Choose a size

17″ geometry

Archive context: The head angle of 68° sits toward the slacker end. The seat angle of 67° sits toward the more relaxed end. The chainstay of 485 mm sits toward the longer rear-center end.

Compared with 18 distinct hybrid geometries in the Small-equivalent size cohort from model years 2021–2023 in the Velopedia archive.

Parts & serviceability

Find replacement parts

3 top part searches
ChainKMC Z9Exact archived model
Front tireCST Metropolitan Palm Bay, 27.5x2.35Named tire and published size
Brake padsTektro HD-M275 hydraulic disc brakeBrake model identified — verify pad shape
More qualified parts (3)
Rear derailleurShimano Altus RDM-2000Named component · published drivetrain speed — verify exact version
ShiftersShimano Altus SL-M2010-9R, 9-SpeedExact archived model
Seatpost31.6 mm seatpostPublished diameter — verify length and setback

Searches use the archived manufacturer specification, not the components currently installed on a particular bicycle. Confirm the exact model, size and fit before ordering. As an Amazon Associate I earn from qualifying purchases. Velopedia may also earn from qualifying eBay purchases. Velopedia may also earn from qualifying retailer purchases. Commercial relationships do not influence Archive specifications or analysis.

Campaign

Used-bike inspection

If you’re buying this bike used

Before any test ride: both brakes should stop the bike firmly and release cleanly; both wheels should run true and be securely attached; tires should have no casing damage; and the headset, handlebar, stem, cranks and pedals should have no looseness or play.

Follow the full used-bike inspection order →
  • FrameLook closely for dents and hairline cracks around welds, the head tube and bottom-bracket area. Cosmetic scratches matter less than a change in shape or a crack line.Inspect the frame and fork →
  • BrakesBoth levers should feel firm and return cleanly. Check for fluid around the levers and calipers, inspect pad thickness and contamination, and look for worn or bent rotors.Inspect the brakes →
  • DrivetrainShift through every gear under light load and measure chain wear. Confirm that the shifter, derailleur, chain and cassette belong to the same 9-speed system.Check drivetrain wear →
  • Wheels & tiresSpin both wheels and watch the rims for side-to-side or vertical movement. Check for dents, cracks, loose or uneven spokes and hub play, then inspect both tire casings for cuts, cracking or exposed threads.Check wheels and tires →
Bike-specific inspection checklist 19 checks based on 5 archived component groups Open checklistClose checklist
0 of 19 checked Progress stays in this browser for this bike.

This checklist uses the archived equipment for this bike. It cannot confirm the condition, service history or later component changes of the example in front of you.

Archived: 2021 Jamis Hudson Disc · Hybrid · Published sizes: 17″, 19″, 21″

Archived: Frame: 6061 TIG-welded aluminum, Hudson laid-back design with low ride height, alloy kickstand · Fork: Hi-tensile unicrown with radiused blades

Archived: Group: Shimano Altus RDM-2000 · Shifters: Shimano Altus SL-M2010-9R, 9-Speed · Rear derailleur: Shimano Altus RDM-2000 · Crankset: Forged alloy crank, single 40T chainring, 170mm, with full length chainguard · Bottom bracket: Sealed cartridge, 68 x 122.5mm · Cassette: Sun Race CSM90-9AW 11-36T · Chain: KMC Z9

Archived: Brakes: Tektro HD-M275 hydraulic disc brake

Archived: Wheel size: 27.5 · Wheels: Alex DC25 alloy double-wall rims, 36H, Formula alloy QR hubs, 14g black stainless steel spokes · Front tire: CST Metropolitan Palm Bay, 27.5 x 2.35 · Rear tire: CST Metropolitan Palm Bay, 27.5 x 2.35

Controls and contact points

Archived: Headset: Internal cup, threaded, 1 1/8” · Handlebar: Comfort hi-rise, alloy 25.4 x 80mm rise x 15 ̊ sweep x 640mm · Stem: Jamis alloy, 180mm quill x 80mm extension · Seatpost: Alloy micro-adjust, 31.6 x 300mm, with alloy QR clamp · Saddle: Jamis Comfort with memory foam, synthetic suede top, burnished side panels and bumper springs · Pedals: Comfort platform with TPE non-slip insert

Before and during the test ride

Follow the full used-bike inspection order →

Build relationships are limited to the archived manufacturer specifications. Confirm exact fit and standards before ordering parts or performing service.

My Garage

Velopedia

Enter your email and Velopedia will send a private sign-in link. No password required.

Have you owned this bike?Help preserve its real-world history by sharing your owner experience.

Share the details that would help another rider understand how this model fits, rides and holds up over time. Velopedia reviews every contribution before publication.

After submitting, use the verification link sent to your email. Nothing appears publicly until Velopedia approves it.

Already contributed? Send me a fresh private edit link

For privacy, Velopedia shows the same confirmation whether or not an experience exists.

Gallery

Current market

Snapshot not yet available
Protected live updateReady after page interactionAutomated crawlers do not trigger marketplace requests.

Move, scroll, tap or type to start the protected update.

Campaign

Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.

Scroll to Top