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Diamondback Mason FS Pro 29er Bike - 2014


This product is no longer available, but don't go just yet.


  • Fox Float CTD Air rear shock can be easily tuned between the 3 CTD settings (climb, trail, descend) for efficiency on any gradient with great protection from bottoming out
  • Fox 34 Float CTD Air fork has 140mm of travel that can be easily tuned among the 3 modes, and includes a tapered steerer, magnesium lowers and a 15mm thru axle
  • The heart of the Mason FS Pro 29er is the Knuckle Box platform, which lowers the center of gravity of the suspension to optimize efficiency and effortlessly absorb small bumps
  • SRAM X-01 crankset is paired with a 11-speed, 10-42t cassette for a simple approach to trail domination
  • SRAM X-01 shifters guides the SRAM X-01 rear derailleur quickly and precisely through the 11 gears
  • 6061-T6 weapons-grade aluminum frame boasts an array of formed and butted-and-formed tubes along with a tapered head tube to deliver a strong, stiff and responsive ride
  • Slack 66.5° head tube angle offers stable, confidence-inspiring handling on aggressive trails; 16.77 in. long chainstays make it easier to get the front up over obstacles
  • AVID XO Trail hydraulic disc brakes with 200mm front and 180mm rear rotors offer elite stopping power and high sensitivity
  • Easton HAVEN Clincher wheelset wrapped in Kenda Nevegal tires with a grippy rubber compound make for a premium, light weight package
  • Specs on the Diamondback Mason FS Pro 29er full-suspension mountain bike are subject to change


All bicycles sold at REI include a free warranty tune-up. New bikes go through a normal break-in period, after which readjustment is important for longevity and performance. Bring your new bike in to your local REI for its free tune-up within 20 hours of use or 6 months from purchase, whichever comes first. Contact your nearest REI bike shop to schedule this important service.

An oversize shipping charge of $75 applies to this item (plus regular shipping fees). Or ship it FREE to any REI store for pickup.

View all Diamondback Full-Suspension Mountain Bikes

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Best use Mountain biking
Frame 6061 aluminum
Bike suspension Front suspension
Fork Fox 34 Float CTD adjust FIT, 140mm travel with 15mm thru-axle
Rear shock Fox Float CTD adjust
Crankset SRAM X01, 32t
Bottom bracket SRAM GXP
Shifters SRAM X01
Rear derailleur SRAM X01
Rear cogs SRAM X01, 10-42, 11-speed
Number of gears 11 gear(s)
Brake type Disc brake
Brakes Avid X0 Trail hydraulic disc
Brake levers Avid X0 Trail
Rims Easton Haven
Front hub Easton Haven, 24h
Rear hub Easton Haven, 24h
Wheel size 29 inches
Tires Kenda Nevegal, 29 x 2.35
Handlebar shape Riser bar
Handlebar Raceface Atlas
Stem Raceface Atlas
Seat post Crankbrothers Kronolog Dropper
Saddle WTB Silverado Race SL
Pedals DB Sound Alloy platform
Headset FSA No57
Chain SRAM PC-1031
Weight Unavailable
Bike weight Weight provided is that of the as-sold median size (or the average of two median sizes).
Gender Unisex

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