Velopedia Bicycle Archive

2021 Jamis Hudson E2

Electric-assist bicycle from the Velopedia specification archive.

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What Velopedia knows

Model year
2021
Category
Hybrid
Original MSRP
$2,199.95
Sizes
19″, 14″ S/T, 18″ S/T
Colors
Deep Blue, Thunder Gray
Weight
47.50 lbs
Geometry
3 manufacturer sizes · Geometry context
Record coverage
24 preserved details · 3 archived images · original MSRP · preserved geometry
Archive ID
900001690
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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

19″14″ S/T18″ S/T

Published colors

Deep BlueThunder Gray

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 RD-TY300 rear
ShiftersShimano Altus SL-M310, 7-speed
Rear DerailleurShimano RD-TY300 rear
CranksetForged alloy crank, single 42T chainring, 170mm, with full length chainguard
Bottom BracketSealed cartridge, 68 x 122.5mm w/ single side torque sensor
CassetteShimano freewheel 7-speed, 14-34
ChainKMC Z51
PedalsComfort platform with TPE non-slip insert

Brakes

BrakesTektro HD-M275 hydraulic disc brakes with 160mm rotors and Tektro brake levers.

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, alloy QR front hub with Hyena 250w rear hub drive motor, 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

E-bike System

MotorRear hub motor providing Class-1 assist up to 20MPH
Battery320wh battery provides an average range of 20-50 miles

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.

Measurement19″14″ S/T18″ S/T
Effective top tube627 mm587 mm607 mm
Head tube180 mm165 mm185 mm
Head-tube angle68°68°68°
Seat-tube angle67°67°67°
Chainstay / rear center485 mm485 mm485 mm
Wheelbase1141 mm1101 mm1121 mm
Bottom-bracket height286 mm286 mm286 mm
Standover height797 mm466 mm488 mm
Fork offset / rake55 mm55 mm55 mm

Geometry source: Jamis first-party geometry table (2021 GEO - HUDSON E2) ↗ Measurements can vary by configuration, wheel size, or flip-chip position where noted by the manufacturer.

Geometry tools

Analyze a published size

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19″ geometry

Archive context: The seat angle of 67° sits toward the more relaxed end. The chainstay of 485 mm sits toward the longer rear-center end. Its wheelbase of 1141 mm sits somewhat shorter than typical.

Compared with 13 distinct electric-assist 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 Z51Exact archived model
CassetteShimano freewheel 7-speed, 14-34Named component · published drivetrain speed — verify exact version
Front tireCST Metropolitan Palm Bay, 27.5x2.35Named tire and published size
More qualified parts (5)
Brake padsTektro HD-M275 hydraulic disc brakesBrake model identified — verify pad shape
Rear derailleurShimano RD-TY300 rearExact archived model
ShiftersShimano Altus SL-M310, 7-speedExact archived model
Seatpost31.6 mm seatpostPublished diameter — verify length and setback
WheelsAlex DC25 alloy double-wall rims, 36H, alloy QR front hub with Hyena 250w rear hub drive motor, 14g black stainless steel spokesNamed archived component — verify dimensions

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.

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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 →
  • E-bike systemConfirm the main battery charges with the correct charger, locks securely into its mount and has no case damage, swelling, corrosion or overheating marks. Power the bike on from cold, test every assist mode and ask for available battery-health and diagnostic records.Check the battery and electronics →
  • 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 23 checks based on 6 archived component groups Open checklistClose checklist
0 of 23 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 E2 · Electric-assist · Published sizes: 19″, 14″ S/T, 18″ S/T

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 RD-TY300 rear · Shifters: Shimano Altus SL-M310, 7-speed · Rear derailleur: Shimano RD-TY300 rear · Crankset: Forged alloy crank, single 42T chainring, 170mm, with full length chainguard · Bottom bracket: Sealed cartridge, 68 x 122.5mm w/ single side torque sensor · Cassette: Shimano freewheel 7-speed, 14-34 · Chain: KMC Z51

Archived: Brakes: Tektro HD-M275 hydraulic disc brakes with 160mm rotors and Tektro brake levers.

Archived: Wheel size: 27.5 · Wheels: Alex DC25 alloy double-wall rims, 36H, alloy QR front hub with Hyena 250w rear hub drive motor, 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

Archived: Motor: Rear hub motor providing Class-1 assist up to 20MPH · Battery: 320wh battery provides an average range of 20-50 miles

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.

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

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