Diamondback Bicycles

Mason Bike - 2017

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  • An all-mountain hardtail with Plus size tires.
  • 6061-T6 aluminum frame with 148x12 Boost dropouts
  • Rockshox Sektor RL 27.5+, 120mm, Solo Air spring, external rebound adjust w/ lockout, magnesium lowers, 1.5" tapered steer tube, 15mm thru axle
  • SRAM NX 1x chain ring, w/ X-Sync (28T)
  • SRAM Level hydraulic disc brakes


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Product Details

As one of the first slack 29er hardtails, our original Mason showed everyone how fun big wheels could be. Far from a boring “wagon wheeler,” the Mason piled up accolades, combining the speed of a larger wheel with a nimble platform. In keeping with its trailblazing spirit, we felt the Mason to be the perfect candidate for 27.5” Plus wheels. We redesigned it around “mid-fat” wheels, but made sure to keep the ride characteristics as similar as we could: the butted/formed aluminum frame is low-slung and slack, with a 120mm Rockshox air fork. The ride has stayed distinctly all-mountain, benefitting from the increase in traction from running a 2.8” wide tire. SRAM Level hydraulic brakes, a wide-range NX 1×11 drivetrain, and wide bars have the Mason leading the way again.

  • Frame: Mason 27.5" Plus 6061-T6 Weapons Grade Aluminum w/ Double Butted Formed Top Tube, Down Tube, Seatstays, Tapered Head Tube, ISCG-05 Tabs, 148x12mm Boost Spec Dropouts, w/ Replaceable Hanger
  • Fork: Rockshox Sektor RL 27.5+, 120mm Travel, Solo Air Spring, External Rebound Adjust w/ Turnkey Lockout, Magnesium Lowers, Alloy 1.5" Tapered Steerer Tube, 15mm Thru-axle
  • Headset: FSA NO.57, Sealed Cartridge for Tapered Headtube
  • Cranks: SRAM NX 1x, w/ X-Sync 28T Chain Ring
  • Bottom Bracket: SRAM GXP
  • Rear Derailleur: SRAM NX X-Horizon, 11 Speed
  • Shifter: SRAM NX 11 Speed X-Actuation Trigger
  • Cogset (Cassette/Freewheel): SRAM PG1130, 11 Speed, 11-42T
  • Chain: KMC X11EL, 11 Speed
  • Front Hub: 32h Alloy, Boost 110x15mm Thru-axle, Sealed Cartridge Bearing, w/ CNC Disc Mount
  • Rear Hub: 32h Alloy, Boost 148x12mm Thru-axle, 4 Sealed Cartridge Bearing, Cassette
  • Spokes: 14g Stainless Steel
  • Rims: Diamondback Blanchard 38, Tubeless Compatible, 32h
  • Tires: Schwalbe Nobby Nic 27.5x2.8", Performance, Folding, Tubless Compatible
  • Brakes: SRAM Level Hydraulic Disc, w/ 180mm Front / 180mm Rear Centerline Rotors
  • Brake Levers: SRAM Level Hydraulic Levers w/ Tooled Reach Adjust
  • Pedals: DB4L Alloy Platform w/ Replaceable Pins
  • Handlebar: DB35 Alloy, 760mm Wide, 15mm Rise, 35mm Bar Bore
  • Grips: DB4L "Lock on" 135mm Kraton
  • Stem: DB35 Alloy, 60mm, 35mm Bar Bore
  • Seat: DB Race M-series Saddle
  • Seatpost: DB Alloy Micro Adjust 30.9mm
  • Extras:Owner’s Manual, Assembly Guide, DB Mud Guard, Tool Kit*