DiamondBack Mason FS 29 Black 2014

Mason FS 29

  • Diamondback proprietary All Mountain Full Suspension 29’er Aluminum Frame
  • 29” diameter wheels for navigating larger obstacles
  • Hydraulic disc brakes for premier stopping power
  • FOX Front and Rear Suspension for a superior ride
  • 2 × 10 drivetrain gearing; a simple approach to trail domination

For 2013 we brought you the revolutionary Mason all mountain hardtail that quickly became the most sought after model in the Diamondback stable; now time for our encore in 2014, the Mason FS.

The Diamondback Mason FS represents a pinnacle in technology and innovation. Utilizing Diamondback’s Knuckle Box suspension, we’ve designed a 140mm travel all-mountain slayer that climbs like the sun and descends with prowess. Featuring a tapered head tube, a 142×12mm thru axle, and optimally placed pivots, the frame was designed around low leverage rate and a low center of gravity. The tight linkage cradles the rear shock and the tight aluminum hardware with Force-Rated Enduro Max Bearings withstands higher loads and better handles oscillating motion. The rear seatstay bridge has been beefed up to handle better lateral forces for the stiffest rear end available. Wrap all of these goodies into a frame with a 66.5 degree headtube angle, a low BB and short chainstays… BOOM. Enough said. Go ride.

Loading up the front end is a Fox 34 Float 29 CTD air, 140mm / 110mm travel, open cartridge, with external rebound, butted Alloy 1.5 Tapered steerer, 34mm Easton aluminum stanchions, magnesium lowers, w/QR15 thru axle. Paired with a Fox Float rear shock with boost valve and CTD settings (Climb, Trail, Descend) your needs are covered.

32h AM290HD double wall disc specific rims are laced to 32h sealed cartridge bearing hubs and thru axels for a stout yet light weight wheelset. AVID Elixir 5 Hydraulic Disc brakes with 200mm front & 180mm rear HS-1 rotors offer optimized stopping power when and where you see fit.

Benefits of a 29” wheel are pretty apparent:

  • Angle of Attack – Larger wheels decrease your angle of attack by allowing you to roll over obstacles easier and faster. Bigger wheel = smaller obstacle.
  • Momentum – A larger wheel enables one to carry momentum easier though obstacles.
  • Surface Contact – 29”wheels are less prone to sinking in soft material such as sand and mud due to the larger contact patch causing lower ground pressure. The longer contact patch increases cornering and straight line traction.
  • Stability – The relative position of the bottom bracket/cranks to the axles in the wheels also means that your relative center of gravity is lower. This results in a feeling of riding “in” the bike rather than on top of it.
  • Tire Clearance – with more tire choices than any platform, the 29”wheel easily accommodates off road as well as commuting tires.
  • Taller Riders – 29″ bikes tend to offer taller riders a more “natural” frame geometry.

The drivetrain is ready to roll with a RACEFACE Respond 24/36 2-ring 10 spd with outboard bearing bottom bracket. Combine this with a SRAM X-9 Type 2 10spd rear derailleur with X-7 trigger shifter, and a SRAM PG-1030 10spd Cassette (11-36t) and you have a simplistic approach that offers a variety options to get you up and down with ease.

Get a feel for the cockpit with the Easton EA50 stem and DB PROBAR handlebars, an Easton EA50 Double Bolt seatpost and the WTB Silverado Race SL saddle; all systems are go for launch.

With all of the new 29ers on the market, isn’t it great to know that our gravity oriented friend can play too?

The Mason FS comes in Grey and is available in four sizes: SM (15.5″), MD (17″), LG (19″), XL (21″).


Sizes 15.5″ Small  17″ Medium  19″ Large  21″ XLarge
Frame Mason FS 29″ All Mountain 140mm travel Full Suspension Frame, 6061-T6 Weapons Grade Aluminum w/formed Top Tube, Butted / Formed Down Tube / Seatstays, Tapered Head Tube, ISCG, 142x12mm Maxle Drop out
Fork Fox 34 Float CTD air, 140mm travel, open cartridge, w/ ext. rebound, butted Alloy 1.5 Tapered steerer, 34mm Easton aluminum stanchions, magnesium lowers, w/QR15 thru axle
Rear Shock Fox Float, CTD, boost valve, “LV” eyelet, 7.875×2.250″ Air, DB Mission Spec, w/rebound adj, w/Climb, Trail, Descend, lever
Cranks RACEFACE Respond 10 spd w/outboard bearing BB w/All Mountian guard 24/36/AM
Bottom Bracket Raceface BB
F. Derailleur Shimano Deore dual pull, top swing 34.9
R. Derailleur SRAM X-9, Type 2 10spd
Shifter SRAM X-7 10spd trigger
Brake Levers AVID Elixir 5 Hydraulic Levers with reach adj
Brakes AVID Elixir 5 Hydraulic Disc w/200mm frt 180mm rr HS-1 rotors
Cassette SRAM PG-1030 10spd Cassette (11-36t)
Rims 32h AM290HD Doublewall Disc
Tires KENDA Nevegal 29×2.35, w/STICK-E rubber compound, Folding
Pedals DB Sound Alloy w/ molded traction pins
Handlebar DB PROBAR 25mm Rise 740mm width 31.8mm
Stem Easton EA50 31.8mm
Seatpost Easton EA50 Double bolt clamp 30.9mm
Seat WTB Silverado Race SL
Headset FSA No57 Taper 1.5 / 1 1/8″standard cups, Sealed Cartridge
Colors Black
Chain SRAM PC-1031 Power Link – Gold
Hubset (F) 32h 15mm thru axle, Alloy, loose ball bearing Disc (R) 32h 142×12 sealed cartridge bearing, 12mm thru axle, Cassette w/ CNC Disc mount, w/ Shimano E-Thru QR Axle
Spokes 14g Stainless Steel
Grips DB4L “Lock on” 135mm Kraton
Extras Owner’s manual, Chainstay Protector, H20 bottle mounts
Note Specifications Subject to Change


Size 15.5″ Small 17″ Medium 19″ Large 21″ XLarge
Seat Tube Length ** 15.5″ 17.0″ 19.0″ 21.0″
Standover Height 30.5″ 31.0″ 31.5″ 32.7″
Top Tube Length * 22.5″ 23.7″ 24.4″ 25.3″
Head Tube Length 110.0mm 110.0mm 110.0mm 110.0mm
Head Angle 66.5° 66.5° 66.5° 66.5°
Seat Angle 73.0° 73.0° 73.0° 73.0°
Wheel Base 1089.0mm 1108.0mm 1127.0mm 1145.0mm
Chain Stay Length 433.0mm 433.0mm 433.0mm 433.0mm
Fork Offset 40.0mm 40.0mm 40.0mm 40.0mm
BB Height 330.0mm 330.0mm 330.0mm 330.0mm
Stem Length 45.0mm 45.0mm 60.0mm 60.0mm
Handlebar Width 740.0mm 740.0mm 740.0mm 740.0mm
Crank Length 170.0mm 175.0mm 175.0mm 175.0mm
Seat Post Length 350.0mm 350.0mm 350.0mm 350.0mm

* Measured Horizontally

** Measured from Center