Diamondback Cobra 20 Jr Boys Mountain Bike (20-Inch Wheels)

by RALEIGH

Product Description

Amazon.com

With a steel frame built for speed on dirt trails but with features conducive to a beginner, The Cobra 20 Jr. Mountain Bike is Diamondback's introductory mountain bike for boys. It features a front suspension fork, and durable Shimano twist shifters and derailleurs for trouble-free, single-handed gear changes that familiarize the beginning rider with the process of shifting. The six-speed twist shifter introduces the young rider to shifting without causing too much confusion, while the linear pull brakes are a great way get him used to braking with his hands instead of his feet. Features an integrated chainguard and wide, knobby tired for traction on dirt, rock, and scree.

Features:

• Steel frame is built both for speed on dirt trails but with features designed for a beginner
• Front suspension fork features 40mm of shockproof travel to ensure a smooth ride
• Drivetrain provides 6 speeds; integrated chainguard
• Comfortable SunRace twist shifters allow the hands to remain properly positioned while changing gears
• Linear-pull brakes offer reliable stopping power and comfortable hand-brake levers
• Wide, knobby tires provide great traction on varied surfaces

Specifications:

• Best Use: Mountain biking
• Bike Style: Mountain bike
• Size: 20-inch wheels
• Bike Frame: Steel
• Bike Suspension: Front suspension
• Fork: Zoom suspension, 40mm travel
• Crankset: 140mm 1-piece 40
• Bottom Bracket: Looseball
• Shifters: SunRace twister
• Front Derailleur: N/A
• Rear Derailleur: Shimano
• Rear Cogs: Shimano MF-TZ20, 14-28, 6-speed freewheel
• Number of Gears: 6
• Brake type: Rim brake
• Brakes: Alloy linear
• Brake Levers: Alloy linear
• Rims: Steel
• Front hub: 36h nutted
• Rear hub: 36h nutted
• Wheel size: 20 inches
• Tires: Junior ATB knobby 20 x 2.0
• Handlebar Shape: Riser bar
• Handlebar: Steel junior riser, 20.5? wide x 1? rise
• Stem: Steel quill
• Seat Post: Steel Pillar 27.2mm
• Saddle: Junior ATB 2-panel
• Pedals: Resin platform
• Headset: Threaded 1 inch
• Gender: Boys

Product Details

• Shipping Information: View shipping rates and policies
• Shipping: This item is also available for shipping to select countries outside the U.S.
• ASIN: B004EVII9G
• Average Customer Review: 4.1 out of 5 stars  See all reviews (10 customer reviews)
• Amazon Best Sellers Rank: #12,138 in Sports & Outdoors (See Top 100 in Sports & Outdoors)
  • #13 in Sports & Outdoors > Bikes & Accessories > Kids' Bikes & Accessories > Kids' Bikes

Customer Reviews

Most Helpful Customer Reviews

11 of 11 people found the following review helpful:

5.0 out of 5 stars Great bike for kids, October 7, 2009

By 

A. Thomas - See all my reviews
(REAL NAME)   

This review is from: Diamondback Cobra 20 Jr Boys Mountain Bike (20-Inch Wheels) (Sports)

This is a great little bike for someone who already knows how to ride a bike. This would not make a good first bike. My son started riding smaller bikes when he was 4 and all of his previous bikes were really cheap but were good for learning. We gave him this one for his 7th birthday and it is really nice. The bike works with much less effort than his earlier bikes largely because the wheel bearings, gearing, brakes, and components are much higher quality. He really likes being able to shift the gears, but he really doesn't know how to use them properly - hopefully that will come soon enough. The only drawbacks are that the bike only has hand brakes, which takes some time for younger riders to master. When they do get it, however, the brakes work much better than a pedal style coaster brake. Also, there is no kick stand, but one can be easily added. One last comment is that we bought this bike from a bike shop and they assembled it and then adjusted it again when we bought it. I'm sure that plays a large role in the quality feel of this bike.

3 of 3 people found the following review helpful:

5.0 out of 5 stars 7 y.o. son loves it; came with instructions, June 22, 2011

By 

ataraxiaone - See all my reviews

Amazon Verified Purchase

This review is from: Diamondback Cobra 20 Jr Boys Mountain Bike (20-Inch Wheels) (Sports)

Having read the reviews about no instructions and the difficulty of assembling and adjusting, I was on the fence for the purchase. The concerns proved to be unfounded. You don't even need tools, they are supplied with the kit; all you need is an ounce of DIY spirit and a couple of hours (MAX), and you will have a happy child on a great bike. The most involved part of the assembly was the brake and cable adjustment, but the instructions are pretty clear; and um, my 7y.o. is not going to be competing professionally with this bike--it does not need competition grade maintenance. It just needs to work well enough to be comfortable and safe for the child.

Now, this is probably not the first bike you should get for a child; my son was proficient with his smaller bike, which he'd been riding since he was four. There is some learning involved with shifting gears (in fact, my son likes to leave it on a low setting); and some learning to use only handle brakes. There is no kickstand. It is heavier than an alloy bike; I believe it is a steel frame.

3 of 3 people found the following review helpful:

4.0 out of 5 stars Great!, November 13, 2009

By 

Brenda Walsh (Texas, USA) - See all my reviews
(REAL NAME)   

Amazon Verified Purchase

This review is from: Diamondback Cobra 20 Jr Boys Mountain Bike (20-Inch Wheels) (Sports)

Nice looking, great bike, my son, who's 8 loves it and wants to ride all the time. The only drawback is, he has a hard time switching gears. Very happy with it!

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