DiamondBack Mason Pro Red 2014

Mason Pro

  • Diamondback proprietary All Mountain 29’er Aluminum Frame
  • 29” diameter wheels for navigating larger obstacles
  • Hydraulic disc brakes for premier stopping power
  • FOX Front Suspension for a superior cushion and ride
  • 1 × 10 drivetrain gearing; a simple approach to trail domination

As 29ers become ever more prevalent, many companies are exploring how far they can take it. Geometry limits to some degree the direction some might go with this, and thus has led to a wide variety of XC oriented 29ers but not much more. For us riders here in the northwest, we needed a 29inch offering that was a little bit more capable. Enter the Mason Pro All Mountain hardtail. This rig is slack and low slung – meant for today’s shredder who wants to pedal up but charge down with aggressiveness.

The Mason Pro features an All Mountain 6061-T6 Weapons Grade Aluminum frame with a formed top tube, a formed and butted down tube, a tapered head tube, a direct mount front derailleur mount,ISCG tabs and a 142×12mm Maxle drop out.

Loading up the front end is a Fox 34 TALAS 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. This also lends to a slack, 66.5 degree head angle. Combine this with 433mm/ 17.05? long chain stays and you can clearly see where this is going. This keeps the bike maneuverable, easy to manipulate in downhill and aired out sections, and easier to get the front end of the bike up with the slack head angle. Because the long travel fork lifts the front end of the bike up pretty high, we designed a formed, low top tube for better clearance over the bike.

WTB I-23, 29″ 32h, single eyelet double wall disc specific rims are laced to 32h sealed cartridge bearing hubs and SRAM MAXLE QR 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 stacked with a RACEFACE Respond w/ NEW 32t Narrow-Wide single ring with outboard bearing bottom bracket . Combine this with a SRAM X-9 Type 2 10spd rear derailleur and shifter, and a SRAM PG-1030 10spd Cassette (11-36t) and you have a minimalist approach with a variety of options to get you up the hill with ease.

Get a feel for the cockpit with the Raceface Respond stem and handlebars, a 30.9mm Crank Brothers Kronolog Dropper post, and the DB MASON Signature saddle; all systems are a 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 Pro comes in a Raw Red paint scheme and is available as a frame only or a complete bike in four sizes: SM (15.5″), MD (17″), LG (19″), XL (21″).


Sizes 15.5″ Small  17″ Medium  19″ Large  21″ XLarge
Frame Mason 29″ All Mountain 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 29 CTD air, 140mm, open cartridge, w/ ext. rebound, butted Alloy 1.5 Tapered steerer, 34mm Easton aluminum stanchions, magnesium lowers, w/QR15 thru axle
Rear Shock
Cranks RACEFACE Respond w/ NEW 32t Narrow-Wide Single Ring w/outboard bearing BB
Bottom Bracket Raceface BB
F. Derailleur MRP 1X – D mount chain guide
R. Derailleur SRAM X-9, Type 2 10spd
Shifter SRAM X-9 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 WTB I-23, 29″ 32h, single eyelet, Doublewall Disc
Tires KENDA Nevegal 29×2.2 frt / Slant 6 29×2.0 rear, Folding
Pedals DB Sound Alloy w/ molded traction pins
Handlebar RACEFACE Respond 740mm riser bar 31.8mm
Stem RACEFACE Respond Stem 45mm / 60mm ext.
Seatpost Crank Brothers Kronolog Dropper 30.9
Seat DB MASON Signature saddle
Headset FSA No57 Taper 1.5 / 1 1/8″ Alloy cups, Sealed Cartridge
Colors Black
Chain SRAM PC-1031 Power Link – Gold
Hubset (F) 32h 15mm thru axle, Alloy, sealed cartridge bearing Disc (R) 32h 142×12 sealed cartridge bearing, 12mm thru axle, Cassette w/ CNC Disc mount, w/ Sram MAXLE QR
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