Diamondback Release 4C Bike

Color:Dusk Blue Satin
Size: XS
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Join the co-op today and get back an estimated $435.00 on this item.

Boasting bottomless-feeling rear suspension, deft handling and a light, stiff carbon frame, the Diamondback Release 4C slices through technical terrain and makes short work of climbs.

  • Features

    • Monocoque carbon front and rear triangle offer stiff and efficient ride characteristics; 148 x12 mm Maxle rear dropouts increase stiffness where it counts
    • 130 mm Level Link rear travel with Fox Float DPS EVOL LV shock and 150 mm front travel with Fox 36 Performance Float fork combine for smooth, bump-eating performance
    • Level Link suspension system isolates chain forces from trail inputs for suspension that doesn't bob when you stomp on the pedals, yet remains plush on technical descents
    • SRAM NX Eagle 12-speed single-ring drivetrain provides consistent shifting and, thanks to its 50-tooth granny gear, makes short work of pesky climbs
    • SRAM G2 R brakes let you slice through the most technical lines with confidence
    • KS Rage-I dropper post with Westy left-hand remote lever adds maneuverability on descents
    • Diamondback Blanchard 28R wheels make it easy to go tubeless
    • Includes DB aluminum platform pedals with replaceable pins
    • Specs and images are subject to change


    Free Adjustment Period:
    New bikes go through a normal break-in period, after which they should be readjusted. All bicycles sold at REI include free adjustments for one year after purchase date—as many times as you need. Included: derailleur and brake adjustments, lateral wheel truing, hub and headset bearing adjustments, tire inflation and chain lubrication. Not included: replacement or installation of new components or accessories, any other services. Call your local REI Co-op Bike Shop for more information.
    View all Diamondback Full-Suspension Mountain Bikes
  • Technical Specs

    Best Use

    Mountain Biking

    Mountain Bike Style


    Bike Frame Material



    Monocoque carbon front and rear triangle

    Bike Suspension

    Full Suspension


    Fox 36 performance float, 27.5 in., 150 mm travel, grip 3-position dampener, rebound adjust, 1.5 in. tapered steerer, 110 x 15 mm thru axle, 44 mm offset

    Fork Travel

    150 millimeters

    Rear Shock

    Fox Float DPS EVOL LV, Performance, 3-Position Lever, 200 x 57 mm, 22.2 mm Eyelet Width


    SRAM Descendant 6K Eagle with 32T Direct Mount

    Bottom Bracket

    SRAM DUB Outboard Bearing


    SRAM NX Eagle 12 Speed

    Rear Derailleur

    SRAM NX Eagle 12 Speed

    Rear Cogs

    SRAM PG-1230 Eagle, 12 Speed, 11-50T

    Number of Gears

    12 gear(s)

    Brake Type

    Hydraulic Disc Brake


    SRAM G2 R, 4 Piston with 180 mm Front and Rear Centerline Rotors

    Brake Levers

    SRAM G2 R


    Diamondback Blanchard 28R, Tubeless ready, 32-hole

    Front Hub

    32h Aluminum Boost 110 x 15 mm thru axle, Sealed Cartridge Bearing

    Rear Hub

    32h Aluminum Boost 148 x 12 mm thru axle, 5 Sealed Cartridge Bearing, Cassette

    Wheel Size

    27.5 inches


    Maxxis Minion DHF 27.5 x 2.3 in. EXO, TLR, Folding / Maxxis Minion DHR 27.5 x 2.3 in. EXO, TLR, Folding

    Tire Width

    2.3 inches

    Handlebar Shape

    Riser Bar


    DB35 Aluminum 780 mm Wide, 15 mm Rise, 35 mm Bar Bore


    Factor Components F355, 35 mm Reach, 35 mm Bar Bore

    Seat Post

    KS Rage-I, Internal Dropper, 31.6 mm, Westy 1x Remote; XS = 75 mm, S = 100 mm, M = 150 mm, L/XL = 175 mm


    WTB Volt Chromoly


    DB CNC Platform, Sealed Cartidge Bearing with Replaceable Pins


    FSA No. 57 Sealed Cartridge


    SRAM NX Eagle 12-speed

    Dropper Post






  • Size Chart

    XS S M L XL
    Height Range 5'1"-5'4" 5'4"-5'7" 5'7"-5'10" 5'10"-6'2" 6'2"-6'6"
    Reach 380.0 406.0 429.0 451.0 473.0
    Stack 584.0 584.0 597.0 603.0 612.0
    Effective Top Tube 557.0 585.0 610.0 635.0 660.0
    Seat Tube Center-Top 388.0 394.0 432.0 483.0 533.0
    Standover Height 739.0 739.0 740.0 743.0 749.0
    Head Tube Length 100.0 100.0 110.0 120.0 130.0
    Head Tube Angle (degrees) 66.0 66.0 66.0 66.0 66.0
    Seat Tube Angle (degrees) 73.0 73.0 73.0 73.0 73.0
    Bottom Bracket Height 341.0 341.0 341.0 341.0 341.0
    Wheelbase 1107.0 1133.0 1160.0 1186.0 1213.0
    Chainstay 425.0 425.0 425.0 425.0 425.0
    Fork Offset 44.0 44.0 44.0 44.0 44.0

    Sizing Notes

    Measurements are stated in millimeters unless otherwise indicated.

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