If you're looking for a pure and simple mountain bike experience, the Diamondback Hook 27.5 delivers. It reflects the evolution of the hardtail: it's light, responsive and just plain fun to ride.
- Outfitted with a plush 120mm fork, single-ring drivetrain, 27.5 wheels, and wide handlebars, it's a modern take on the timeless mountain bike
- Frame's slack geometry is long and low to maintain the efficient power transfer and precision of cross-country hardtails, but it's made for ripping
- Short chainstays and a low bottom bracket make it a blast to ride, especially while descending and cornering
- Reliable hand-built aluminum alloy hardtail frame
- SR Suntour XCM 120mm travel suspension fork tackles trail obstacles
- SRAM 1x8 gearing for simplicity and smooth shifting
- Diamondback SL-7 Doublewall 27.5 in. wheels
- Diamondback Pro handlebar, 750mm wide
- NOTE: Specs and images are subject to change based on component availability
Imported.
- 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 | All-mountain |
| Frame | Aluminum |
| Bike Suspension | Front Suspension |
| Fork | SR Suntour XCM 120mm Travel, 30mm Stanchions, Coil Spring with/ Preload Adjust |
| Fork Travel | 120 millimeters |
| Crankset | Alloy Arm with 32T Steel Single Ring |
| Bottom Bracket | Sealed Cartridge |
| Shifters | SRAM X4 8 Speed |
| Front Derailleur | Full ISCG-05 Chain Guide with Roller |
| Rear Derailleur | SRAM X3, 8 Speed |
| Rear Cogs | SRAM PG820, 8 Speed, 11-32T |
| Number of Gears | 8 |
| Brake Type | Mechanical Disc Brake |
| Brakes | Tektro Aries Mechanical Disc with 160mm Rotors |
| Brake Levers | Tektro 2 Finger Alloy Linear w/ Reach Adjust |
| Rims | 32h Diamondback SL-7 Doublewall |
| Front Hub | 32h SL-7 Alloy w/ CNC Disc Mount |
| Rear Hub | 32h SL-7 Alloy w/ CNC Disc Mount, Cassette |
| Wheel Size | 27.5 inches |
| Tires | Kenda Nevegal Lite, 27.5x2.35" |
| Tire Width | 2.35 inches |
| Handlebar Shape | Flat Bar |
| Handlebar | Diamondback "Pro Bar" 750mm Wide |
| Stem | Diamondback "Shortie", 45mm Reach, 31.8 Bar Bore |
| Seat Post | Alloy Micro Adjust 30.9mm |
| Saddle | DB Sync'r Saddle |
| Pedals | DB4L Alloy Platform |
| Headset | FSA IS-3/NO.11 Integrated Style |
| Chain | KMC Z82, 8 Speed |
| Weight | Unavailable |
| 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" - 6'1" | 6'1" - 6'4" |
| Reach | 398 | 417 | 432 | 446 |
| Stack | 577 | 595 | 614 | 633 |
| Effective Top Tube | 575 | 600 | 620 | 640 |
| Seat Tube Center-Top | 400 | 450 | 500 | 550 |
| Standover Height | 728 | 769 | 799 | 830 |
| Head Tube Length | 105 | 125 | 145 | 165 |
| Head Tube Angle (degrees) | 68 | 68 | 68 | 68 |
| Seat Tube Angle (degrees) | 73 | 73 | 73 | 73 |
| Bottom Bracket Height | 305 | 305 | 305 | 305 |
| Wheelbase | 1087 | 1113 | 1135 | 1157 |
| Chainstay | 430 | 430 | 430 | 430 |
| Fork Offset | 44 | 44 | 44 | 44 |
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.