Bicycle Archive · Specification report

2021 Jamis Hardline C4

Velopedia Archive ID 900001526

Overview

Model year	2021
Brand	Jamis
Model	HARDLINE C4
Bicycle type	Mountain
Archive ID	900001526
Original MSRP	$4,799.95
Colors	Thunder Grey
Sizes	S/15.5″; M/17″; L/19″; XL/21″
Weight	31.5 lbs

Frameset

Frame construction	Dyad 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 material	Carbon
Fork	Fox 36 Rhythm Series Float 27.5″ w/ sweep adjust compression & lock-out,15x110mm axle, air spring compression, rebound adjust, tapered alloy steerer, 160mm travel, 44mm rake
Fork material	Aluminum
Rear shock	Fox Float X Performance Series EVOL shock w/3-position compression

Drivetrain

Component group	Shimano Deore, 12-speed
Shifters	Shimano Deore, 1×12-speed
Rear derailleur	Shimano Deore, 12-speed
Crankset	Race Face Ride, 32T
Bottom bracket	Race Face BSA
Cassette	Shimano M6100, 12-speed, 10-51T
Chain	KMC X12, 12-speed

Brakes

Brakes	Shimano MT420 4-piston hydraulic disc, 180mm RT30 rotors

Cockpit & contact points

Headset	FSA Orbit IS Integrated, 8mm cone spacer
Handlebar	Race Face Ride, 760mm x 20mm rise, 35mm diameter
Stem	Race Face Ride, 50mm extension, 35mm clamp diameter
Saddle	WTB Volt
Seatpost	KS Rage Dropper, Southpaw remote

Wheels & tires

Wheels	Stan’s No Tubes Flow D 27.5″ rims, Shimano MT410 15x110mm front & 12x148mm rear hubs, stainless spokes
Front tire	Vittoria Mazza 27.5 x 2.4″, TNT tubeless
Rear tire	Vittoria Mazza 27.5 x 2.4″, TNT tubeless
Wheel size	27.5

Geometry · S/15.5″

Effective top tube	585 mm
Head tube	100 mm
Head-tube angle	65°
Seat-tube angle	73.5°
Chainstay / rear center	429 mm
Wheelbase	1157 mm
Reach	418 mm
Stack	585 mm
Standover height	751 mm

Geometry · M/17″

Effective top tube	610 mm
Head tube	110 mm
Head-tube angle	65°
Seat-tube angle	73.5°
Chainstay / rear center	429 mm
Wheelbase	1182 mm
Reach	439 mm
Stack	595 mm
Standover height	745 mm

Geometry · L/19″

Effective top tube	635 mm
Head tube	120 mm
Head-tube angle	65°
Seat-tube angle	73.5°
Chainstay / rear center	429 mm
Wheelbase	1208 mm
Reach	461 mm
Stack	604 mm
Standover height	749 mm

Geometry · XL/21″

Effective top tube	660 mm
Head tube	130 mm
Head-tube angle	65°
Seat-tube angle	73.5°
Chainstay / rear center	429 mm
Wheelbase	1233 mm
Reach	482 mm
Stack	613 mm
Standover height	765 mm

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on September 13, 2026.