Velopedia Bicycle Archive

2021 Jamis Hardline C3

Mountain bicycle from the Velopedia specification archive.

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What Velopedia knows

Model year
2021
Category
Mountain
Original MSRP
$5,699.95
Sizes
S/15.5″, M/17″, L/19″, XL/21″
Colors
Mash
Weight
29.75 lbs
Geometry
4 manufacturer sizes · Geometry context
Record coverage
23 preserved details · 3 archived images · original MSRP · preserved geometry
Archive ID
900001559
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Manufacturer catalog

Published sizes and colors

4 sizes · 1 color

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

Published sizes

S/15.5″M/17″L/19″XL/21″

Published colors

Mash

Frameset

Frame ConstructionDyad Pro High Modulus Carbon Fiber, 160mm travel 3VO suspension, Enduro® Max sealed bearing pivots, 1.5 – 1 1/8” tapered head tube, 12x148mm thru-axle, Internal dropper post routing, Custom Jamis upper chainguide mounts, ISCG05 lower chainguide mounts, Fox Float X Performance Series EVOL shock w/3-position compression, 10mm hardware, replaceable derailleur hanger
Frame MaterialCarbon
ForkFox 36 Performance Series Float 27.5″ w/ 3-position adjust compression & lock-out,15x110mm axle, air spring compression, rebound adjust, tapered alloy steerer, 160mm travel, 44mm rake
Fork MaterialAluminum
Rear ShockFox Float X Performance Series EVOL shock w/3-position compression

Drivetrain

Component GroupShimano SLX, 12-speed
ShiftersShimano SLX, 1×12-speed
Rear DerailleurShimano SLX, 12-speed
CranksetRace Face Aeffect, 32T
Bottom BracketRace Face BSA
CassetteShimano M7100, 12-speed, 10-51T
ChainKMC X12, 12-speed

Brakes

BrakesShimano SLX M7120 4-piston Ice-Tech hydraulic disc, RT-70 180mm rotors

Cockpit & Contact Points

HeadsetFSA Orbit IS Integrated, 8mm cone spacer
HandlebarRace Face Aeffect R, 780mm x 20mm rise, 35mm diameter
StemRace Face Aeffect R, 50mm extension, 35mm clamp diameter
SaddleWTB Volt
SeatpostRace Face Aeffect R Dropper, 1x remote

Wheels & Tires

WheelsStans Flow S2 27.5″ tubeless wheels, 15x110mm axle front and 12x148mm rear E-SYNC hubs, Sapim Race spokes
Front TireVittoria Mazza 27.5 x 2.4″, TNT tubeless
Rear TireVittoria Mazza 27.5 x 2.4″, TNT tubeless
Wheel Size27.5

Size-specific frame data

Geometry

4 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.

MeasurementS/15.5″M/17″L/19″XL/21″
Effective top tube585 mm610 mm635 mm660 mm
Head tube100 mm110 mm120 mm130 mm
Head-tube angle65°65°65°65°
Seat-tube angle73.5°73.5°73.5°73.5°
Chainstay / rear center429 mm429 mm429 mm429 mm
Wheelbase1157 mm1182 mm1208 mm1233 mm
Reach418 mm439 mm461 mm482 mm
Stack585 mm595 mm604 mm613 mm
Standover height751 mm745 mm749 mm765 mm

Geometry source: Jamis first-party geometry table (2021 GEO - HARDLINE) ↗ 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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S/15.5″ geometry

Archive context: Its stack of 585 mm sits toward the lower end. The seat angle of 73.5° sits somewhat more relaxed than typical. The chainstay of 429 mm sits somewhat shorter than typical.

Compared with 48 distinct mountain geometries in the Small-equivalent size cohort from model years 2021–2023 in the Velopedia archive.
Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze S/15.5″ geometry

Parts & serviceability

Find replacement parts

3 top part searches
ChainKMC X12, 12-speedExact archived model
CassetteShimano M7100, 12-speed, 10-51TNamed component · published drivetrain speed — verify exact version
Front tireVittoria Mazza 27.5x2.4″, TNT tubelessNamed tire and published size
More qualified parts (6)
Bottom bracketRace Face BSANamed archived component — verify dimensions
SaddleWTB VoltNamed archived component — verify exact version
CranksetRace Face Aeffect, 32TNamed archived component — verify exact version
Rear derailleurShimano SLX, 12-speedComponent family — verify exact version
ShiftersShimano SLX, 1×12-speedComponent family — verify exact version
HandlebarRace Face Aeffect R, 780mm x 20mm rise, 35mm diameterNamed 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 →
  • FrameInspect the frame in bright light, especially around the head tube, bottom bracket, chainstays and clamped areas. Look for cracks, ripples, crushed sections or signs of a previous impact.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 →
  • SuspensionAsk when the fork and shock were last serviced. Check the stanchions for damage, look for oil at the seals, cycle both units through their travel and test the suspension pivots for play.Evaluate the suspension →
  • DrivetrainShift through every gear under light load and measure chain wear. Confirm that the shifter, derailleur, chain and cassette belong to the same 12-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. If it is set up tubeless, confirm both tires hold pressure and ask when the sealant was last refreshed.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 Hardline C3 · Mountain · Published sizes: S/15.5″, M/17″, L/19″, XL/21″

Archived: Frame: Carbon · Fork: Fox 36 Performance Series Float 27.5″ w/ 3-position adjust compression & lock-out,15x110mm axle, air spring compression, rebound adjust, tapered alloy steerer, 160mm travel, 44mm rake · Aluminum

Archived: Fork: Fox 36 Performance Series Float 27.5″ w/ 3-position adjust compression & lock-out,15x110mm axle, air spring compression, rebound adjust, tapered alloy steerer, 160mm travel, 44mm rake · Rear shock: Fox Float X Performance Series EVOL shock w/3-position compression

Archived: Group: Shimano SLX, 12-speed · Shifters: Shimano SLX, 1×12-speed · Rear derailleur: Shimano SLX, 12-speed · Crankset: Race Face Aeffect, 32T · Bottom bracket: Race Face BSA · Cassette: Shimano M7100, 12-speed, 10-51T · Chain: KMC X12, 12-speed

Archived: Brakes: Shimano SLX M7120 4-piston Ice-Tech hydraulic disc, RT-70 180mm rotors

Archived: Wheel size: 27.5 · Wheels: Stans Flow S2 27.5″ tubeless wheels, 15x110mm axle front and 12x148mm rear E-SYNC hubs, Sapim Race spokes · Front tire: Vittoria Mazza 27.5 x 2.4″, TNT tubeless · Rear tire: Vittoria Mazza 27.5 x 2.4″, TNT tubeless

Controls and contact points

Archived: Headset: FSA Orbit IS Integrated, 8mm cone spacer · Handlebar: Race Face Aeffect R, 780mm x 20mm rise, 35mm diameter · Stem: Race Face Aeffect R, 50mm extension, 35mm clamp diameter · Seatpost: Race Face Aeffect R Dropper, 1x remote · Saddle: WTB Volt

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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