Diamondback Micro Viper 12" Boys' Bike
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With training wheels that you can take off once your rider learns to balance, the Diamondback Micro Viper 12 in. kids' bike offers a durable design for little ones eager to pedal on their own.
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Wheel Size
12 inches
- Sturdy steel frame and fork are built to handle the rigors of riding
- Single-speed drivetrain with protective chainguard offers simplicity and low maintenance
- Rear coaster brake makes it easy for kids to stop; all they have to do is backpedal to engage the brake
- 12 in. wheels are outfitted with all-terrain Comp III tires for performance on and off the road
- The Diamondback Micro Viper 12 in. kids' bike includes a set of heavy-duty, removable training wheels to get new riders started on the basics of balance
- 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 Kids' Training Wheel 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 | Recreational Cycling |
|---|---|
| Frame | High-tensile steel |
| Bike Suspension | No Suspension |
| Fork | High-tensile steel |
| Crankset | 1-piece steel, 28t |
| Bottom Bracket | 9-piece Loose Ball |
| Brake Type | Coaster |
| Brakes | Coaster brake |
| Rims | Alloy |
| Front Hub | Steel, 16h |
| Rear Hub | Steel, 16h |
| Wheel Size | 12 inches |
| Tires | Comp III Style, 12 x 2.125 |
| Handlebar Shape | BMX Bar |
| Handlebar | Hi-Ten Steel 2-place |
| Stem | Steel 2-bolt quill |
| Seat Post | Alloy |
| Saddle | DB Jr Padded |
| Pedals | Resin platform |
| Headset | Threaded steel |
| Chain | KMC Z410 |
| Weight | 18 lbs. 12 oz. |
| Bike Weight | Bike weight is based on median size, as sold, or the average of two median sizes. |
| Gender | Boys' |
Diamondback Bikes (862825)
| 12 IN | |
|---|---|
| Effective Top Tube | 303 |
| Seat Tube Center-Top | 155 |
| Standover Height | 354 |
| Head Tube Length | 100 |
| Head Tube Angle (degrees) | 71 |
| Seat Tube Angle (degrees) | 71 |
| Wheelbase | 576 |
| Chainstay | 230 |
| Fork Offset | 33 |
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.