How to Choose Mountain Bikes
Diamondback Line 27.5 Mountain Bike
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Blaze through gears with pinpoint precision with the Diamondback Line 27.5 bike, a do-it-all hardtail that's stable under pressure yet playful when you're charging around corners or getting some air.
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Key Details
Wheel Size
27.5 inches
Fork Travel
120 millimeters
Number of Gears
9 gear(s)
- 6061-T6 aluminum hardtail frame has progressive, low-slung geometry that's made for trail-riding performance
- Custom-formed and butted tubing adds strength without adding weight
- SR Suntour XCR fork provides smooth front suspension with 120 mm travel and a lockout for big climbing days
- Powerful Shimano hydraulic disc brakes offer a smooth, responsive performance
- Shimano 1x9 single-ring drivetrain with chain guide delivers simple, hassle-free performance
- Frame is compatible with internally routed dropper posts (dropper post not included)
- Platform pedals included
- NOTE: Specs and images are subject to change based on component availability
Imported.
This bike comes with Coast to Coast Support, which includes:
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.
View all Diamondback Hardtail Mountain Bikes- 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 XCR 120 mm travel fork, 32 mm stanchions, magnesium lowers, with preload adjust and hydraulic lock out |
| Fork Travel | 120 millimeters |
| Crankset | Alloy arm 30T steel "narrow wide" single ring |
| Bottom Bracket | Sealed cartridge |
| Shifters | Shimano Acera M3000, 9-speed |
| Rear Derailleur | Shimano Acera M3000 Shadow, 9-speed |
| Rear Cogs | Shimano HG200, 9-speed, 11-36T |
| Number of Gears | 9 gear(s) |
| Brake Type | Hydraulic Disc Brake |
| Brakes | Shimano MT-200 hydraulic disc brakes with 180 mm front and 160 mm rear rotors |
| Brake Levers | Shimano hydraulic |
| Rims | 32-hole Diamondback DP25 double-wall |
| Front Hub | 32-hole alloy with CNC disc mount, 100 mm |
| Rear Hub | 32-hole alloy with CNC disc mount, cassette, 135 mm |
| Wheel Size | 27.5 inches |
| Tires | Vee Rubber Crown Gem 27.5 x 2.35 |
| Tire Width | 2.35 inches |
| Handlebar Shape | Riser Bar |
| Handlebar | Diamondback, 750 mm wide, 15 mm rise, 31.8 bar bore |
| Stem | Diamondback "Shortie," 45 mm reach, 31.8 bar bore |
| Seat Post | Alloy micro adjust, 30.9 mm |
| Saddle | Diamondback Sync'r saddle |
| Pedals | Diamondback DB4L alloy platform |
| Headset | FSA IS-3/NO.11 Integrated Style |
| Chain | KMC Z9, 9-speed |
| Weight | Unavailable |
| Gender | Unisex |
Diamondback Bikes (200559)
| 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
Measurements are stated in millimeters unless otherwise indicated.
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.
Write a Review
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Customer Images
Location:Kenton, Ohio
Age:25–34
Weight:150–175 lbs.
Inseam:32"
Height:5'10"
Experience Level:Beginner
Riding Frequency:Multiple times per week
3 years ago
First trail bike and I enjoy so far.
Yes , I recommend this product
Speaking as an amateur I think the bike is pretty awesome. I think eventually I'll upgrade the shocks and add a seat dropper. But as far as I'm concerned, good build and would recommend.
Age:25–34
Weight:150–175 lbs.
Inseam:32"
Height:5'10"
Experience Level:Beginner
Riding Frequency:Multiple times per week
Height:5'10"
Experience Level:Beginner
Riding Frequency:Multiple times per week
3 years ago
Fun bike when the chain stays on
No, I do not recommend this product
Bike is 1 star REI bike shop is 5 stars Average is 3 stars The bike would not keep the chain on. The bike shop tried shims and tlc, but no luck. I had the bike approximately 4 weeks and took it in 3 times due to the chain refusing to stay on. In the end they accepted it as a return and I got a different bike.
Height:5'10"
Experience Level:Beginner
Riding Frequency:Multiple times per week
Location:Reno, NV
Age:35–44
Weight:175–200 lbs.
Inseam:32"
Height:6'4"
Experience Level:Beginner
Riding Frequency:Multiple times per week
3 years ago
Good fit for my area.
Yes , I recommend this product
Solid bike with decent components right out of the box.
Age:35–44
Weight:175–200 lbs.
Inseam:32"
Height:6'4"
Experience Level:Beginner
Riding Frequency:Multiple times per week
Location:Mount Laurel , NJ
Age:55–64
Weight:175–200 lbs.
Inseam:30"
Height:5'9"
Experience Level:Experienced
Riding Frequency:Multiple times per week
2 years ago
Diamondback Line 27.5 Rules
Yes , I recommend this product
This bike is awesome, I love the way it handles and how it recovers quickly from any mistakes I make. It's fast and smooth. The 1 x 9 is all the gears I need. It took a little while to get used to the feeling of being over the top of the bike, but now it feels very natural. I highly recommend this ride for anyone from beginner to novice.
Age:55–64
Weight:175–200 lbs.
Inseam:30"
Height:5'9"
Experience Level:Experienced
Riding Frequency:Multiple times per week
Age:35–44
Weight:325–350 lbs.
Inseam:30"
Height:6'0"
Experience Level:Experienced
Riding Frequency:Daily
3 years ago
Yes , I recommend this product
Age:35–44
Weight:325–350 lbs.
Inseam:30"
Height:6'0"
Experience Level:Experienced
Riding Frequency:Daily
