• Online:
  • URL for this product:
  • From the U.S. and CanadaCall 1-800-426-4840
  • Mon. through Sun., 4 a.m. through 11 p.m. PT.
  • InternationalCall 1-253-891-2500
  • Mon. through Sun., 4 a.m. through 11 p.m. PT. English language only.

Diamondback Mason 29er Bike - 2013

This item is currently sold out or unavailable online.

Or, may we suggest shopping for similar items:

Shop more Mountain BikesShop more Diamondback

This page is provided for reference to historical product information.

The Diamondback Mason 29er hardtail mountain bike is built and designed for all-mountain versatility, delivering a solid, stable ride for those tackling aggressive lines.

  • Large 29er wheels roll over obstacles easier and faster thanks to more momentum and a decreased angle of attack; plus, you get more tire contact for enhanced traction
  • 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
  • Fox 34 Talas 29 CTD Air fork has a butted 1.5 in. tapered steerer, 34mm Easton aluminum stanchions, magnesium lowers and QR15 thru axle, all with 140mm of adjustable travel
  • Fork travel can be simply tuned between the 3 CTD settings (Climb, Trail, Descend); also has external rebound adjustment for easy tuning
  • RaceFace Respond single-ringed crankset with MRP chain guide is paired with 10-speed, 11-36t cassette for good all-around gearing; ISCG 05 tabs make an upgrade easy
  • SRAM X9 shifter guides the X9 Type 2 rear derailleur quickly and precisely through the 10 gears
  • Avid Elixir 5 hydraulic disc brakes deliver responsive braking thanks to a 200mm rotor up front and 180mm rotor in the back
  • WTB I-23 rims spin smoothly around sealed cartridge bearing hubs and are wrapped with Kenda Nevegal 29x2.2 (front) and Slant 29x2 (rear) tires
  • KindShock 125mm dropper seatpost offers remote, bar-top control of your saddle height for that "just right" position at any point during your ride
  • 15mm thru axle up front and 142x12mm thru axle in the rear ensure stiff, strong performance at the critical wheel/frame interface
  • Specs on the Diamondback Mason 29er hardtail 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.


Item 848508


This item's hot - and it's only available online.

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

REI Membership

Diamondback Mason 29er Bike - 2013 Specs
Best use
Mountain biking
Mountain bike
6061 Aluminum
Front suspension
Fox 34 Talas 29 CTD Air, 110-140mm of travel
RaceFace Respond 32t
RaceFace BB
SRAM X9 Type 2
SRAM PG-1030
10 gear(s)
Disc brake
Avid Elixir 5 hydraulic disc
Avid Elixir 5
WTB I-23
Alloy, 32h
Alloy, 32h
29 inches
(Front) Kenda Nevegal 29x2.2 / (rear) Kenda Slant 29x2
Riser bar
RaceFace Respond
RaceFace Respond
KindShock Drop Zone
DB Mason
DB sound Alloy platform
SRAM PC-1031
How we measure bike weight
Bike style
Bike frame material
Bike suspension
Bottom bracket
Rear derailleur
Rear cogs
Number of gears
Brake type
Brake levers
Front hub
Rear hub
Wheel size
Handlebar shape
Seat post
Bike weight

Diamondback Mason 29er Bike - 2013

Loading Ratings & Reviews...

Ask a question and have it answered by REI product experts and fellow outdoor enthusiasts. Need immediate assistance? Use Live Help.

Loading Questions & Answers...

How are we doing? Give us feedback on this page.

FREE SHIPPING With $50 minimum purchase

MEMBERS, EARN A $20 BONUS CARD! When you spend $100 April 14-29. Single-use bonus card redeemable May 2-12. Details
  • Join REI today!
  • REI Membership
  • REI member benefits include an annual refund (typically 10% on eligible purchases).
  • Join REI today!
  • Sign up for REI Gearmail®
  • and get 15% off selected items!
  • Store Locator
  • Locate an REI store near you.
  • Find a Store
© 2014 Recreational Equipment, Inc. All rights reserved. REI, the REI Tree and Mountain design, Novara, and
REI Adventures are trademarks of Recreational Equipment, Inc.

Find REI on: FacebookTwitterYouTubeFlickrMobile site