Diamondback Octane Jr Boy’s Mountain Bike (20-Inch Wheels)
Diamondback Octane Jr Boy’s Mountain Bike (20-Inch Wheels)

The Octane 20 is the perfect starter mountain bike for the little one who wants to take to the trails with mom and dad, or just get around the neighborhood and the park with ease.It’s your choice: you can get your kids off to a healthy start by buying them a trouble-free quality bike that gives them their first taste of freedom, or you can buy one with a price closer to free and make riding a source of frustration. Enter the Diamondback Octane Jr., a high-quality boy’s mountain bike that’s a TV’s worst nightmare. The Octane Jr. is equipped with a number of quality replaceable parts, such as a heat-treated aluminum frame with a replaceable derailleur hanger; a 30mm suspension fork; a six-speed Shimano shifter, derailleur, and freewheel; aluminum rims; and alloy linear pull brakes. The features combine to make riding bicycles the liberating and healthy activity it should be.
Specifications:
- Size: Jr. mountain 20-inch (wheels) boy’s frame
- Frame: DB 6061 heat-treated aluminum with replaceable derailleur hanger
- Fork: Trail XC 30mm travel
- Cranks: 140mm 1-piece, 40t
- Bottom bracket: Looseball
- Rear derailleur: Shimano TZ-50
- Shifter: Shimano Revo 6-speed twist
- Brake levers: Alloy linear with reach adjustment
- Brakes: Alloy linear
- Gear: Shimano MF-HG37 6-speed freewheel (14-28t)
- Rims: 36H R-1000 alloy
- Tires: Jr. ATB Knobby 20 x 2.0
- Pedals: Resin
- Handlebar: Steel Jr. Riser, 20.5 inches wide by 1-inch rise
- Stem: Alloy quill
- Seatpost: Steel pillar, 25.4mm
- Seat: Jr. ATB 2-panel
- Headset: 1-inch threaded
- Colors: Blue
- Chain: 1-inch threaded
- Hubset: 36H nutted (front and rear)
- Coaster spokes: 14g
- Grips: DB Kraton
- Extras: Clear coat, chainstay protector, rear derailleur guard
Manufacturer’s Warranty
Lifetime on the frame, 5 years on the fork, 1 year on components, 1 year on labor for the frame, 30 days on labor for parts
User Ratings and Reviews
Filed under: Mountain Bike Reviews

















