Diamondback Mason Trail 27.5+ Bike - 2017
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Diamondback expanded their popular Mason line to offer a hardtail with Plus-tire fun and capabilities. The beefy Mason Trail shares geometry, ride feel, versatility and that adventurous vibe for less.
Shop similar productsKey Details
- With 27.5x3.5 tires mounted on wide Blanchard rims, this bike is so adept at devouring choppy and loose trails that you may wonder why anyone needs rear suspension at all
- Wide-range 1x10 drivetrain makes short work of technical climbs, and the unbelievable plus-tire traction breathes new life into the trails you thought you'd mastered.
- 6061-T6 aluminum frame with 148x12 Boost dropouts
- SR Suntour Radion 27.5" Plus suspension fork delivers 120mm of travel; air-sprung
- SRAM NX X-Sync chainring, 30T
- Tektro Auriga Hydraulic Disc brakes, with 180mm rotor up front and 160mm rotor at back, deliver reliable stopping power
- Shimano Deore M615 Shadow Plus derailleur offers smooth shifting
- NOTE: Specs and images are subject to change based on component availability
- 1 year of free adjustments (see more below)
- In-store bike assembly
- Pickup in store or curbside
- Bike experts available at 170+ bike shops
- 20% off shop services
- Free tubes with purchase of flat tire repair (Co-op Cycles brand tubes only; tube must be installed at time of purchase)
New bikes go through a normal break-in period, after which they should be readjusted. All bicycles sold at REI include free adjustments for one year after purchase date—as many times as you need. Included: derailleur and brake adjustments, lateral wheel truing, hub and headset bearing adjustments, tire inflation and chain lubrication. Not included: replacement or installation of new components or accessories, any other services. Call your local REI Co-op Bike Shop for more information.
| Best Use | Mountain Biking |
|---|---|
| Mountain Bike Style | Trail |
| Frame | 6061-T6 aluminum |
| Bike Suspension | Front Suspension |
| Fork | SR Suntour Radion 27.5" Plus with 15mm thru-axle; air spring |
| Fork Travel | 120 millimeters |
| Crankset | SRAM NX 1x, with X-Sync 30t chainring |
| Bottom Bracket | SRAM GXP |
| Shifters | Shimano Deore M610, 10-speed |
| Rear Derailleur | Shimano Deore M615 Shadow Plus, 10-speed |
| Rear Cogs | Shimano Deore M610, 10-speed |
| Number of Gears | 10 |
| Brake Type | Hydraulic Disc Brake |
| Brakes | Tektro Auriga hydraulic disc, 180mm front / 160mm rear rotors |
| Brake Levers | Tektro Auriga hydraulic disc brake levers |
| Rims | Diamondback Blanchard 38, tubeless compatible, 32h |
| Front Hub | 32h Alloy, Boost 110x15mm thru-axle, sealed cartridge bearing; CNC disc mount |
| Rear Hub | 32h Alloy, Boost 148x12mm thru-axle, 2 sealed cartridge bearing, cassette |
| Wheel Size | 27.5+ inches |
| Tires | Chaoyang Big Daddy 27.5x3.5" |
| Tire Width | 3.5 inches |
| Handlebar Shape | Riser Bar |
| Handlebar | DB35 Alloy, 760mm wide, 15mm rise, 35mm bar bore |
| Stem | DB35 Alloy, 60mm, 35mm bar bore |
| Seat Post | DB Alloy micro-adjust 30.9mm |
| Saddle | DB Race M-Series saddle |
| Pedals | DB4L Alloy with molded traction pins |
| Headset | FSA NO.57, sealed cartridge for tapered head tube |
| Chain | KMC X10, 10-speed |
| Weight | 29 lbs. 2 oz. |
| Bike Weight | Bike weight is based on median size, as sold, or the average of two median sizes. |
| Gender | Unisex |
| S | M | L | XL | |
|---|---|---|---|---|
| Height Range | 5'4" - 5'7" | 5'7" - 5'10" | 5'10" - 6'3" | 6'3" - 6'6" |
| Reach | 400 | 418 | 435 | 455 |
| Stack | 604 | 604 | 604 | 604 |
| Effective Top Tube | 570 | 585 | 614 | 640 |
| Seat Tube Center-Top | 395 | 420 | 470 | 520 |
| Standover Height | 754 | 758 | 777 | 798 |
| Head Tube Length | 110 | 110 | 110 | 110 |
| Head Tube Angle (degrees) | 68 | 68 | 68 | 68 |
| Seat Tube Angle (degrees) | 73 | 73 | 73 | 73 |
| Bottom Bracket Height | 330 | 330 | 330 | 330 |
| Wheelbase | 1089 | 1131 | 1149 | 1168 |
| Chainstay | 440 | 440 | 440 | 440 |
| Fork Offset | 51 | 51 | 51 | 51 |
Sizing Notes
Bike measurements are stated in millimeters.
How we measure bikes
- Standover Height Standover Height is a measurement from the ground to the top of the top tube, measured at the midpoint of the top tube.
- Reach Reach is the horizontal distance from the center of the cranks to the center of the head tube, measured at head tube level.
- Stack Stack is the vertical distance from the center of the cranks to the center of the head tube, measured to the top of the head tube.
- Effective Top Tube Effective top tube is the distance from the center of the head tube to the center of the seat tube/seat post, measured parallel to the ground.
- Seat Tube Center to Top Seat Tube length is the measurement of the seat tube, from the center of the cranks to the top of the seat tube.
- Head Tube Length Head Tube Length is measured from the bottom to the top of the head tube.
- Head Tube Angle Head Tube Angle is the acute angle between the head tube and the ground (measured towards the rear of the bike)
- Seat Tube Angle Seat Tube Angle is the acute angle between the seat tube and the ground (measured towards the rear of the bike).
- Bottom Bracket Height Bottom Bracket Height is a measurement taken vertically from the ground up to the center of the cranks.
- Wheelbase Wheelbase is the measurement from the center of the front axle to the center of the rear axle.
- Chainstay Length Chainstay Length is the measurement from the center of the cranks to the center of the rear axle.
- Fork Offset Fork Offset, or rake, is the distance from the front axle to a line drawn parallel to the center of the head tube or steering axis.