Ridgeback Dimension 20

20″ Wheels

9.1kg

5.5 to 8.5 years

112cm to 130cm rider height

The Dimension 20 — Lightweight Fun for the Next Big Adventure

The lightweight Dimension 20 is the perfect kids bike for riders aged 5½ and upwards who are making the exciting move to gears and going further than ever before!

Designed with a light aluminium frame, fork and parts, the Dimension 20 is easier to manage, making every ride smoother and more enjoyable. Wide-range 7-speed Shimano gearing tackles the ups and downs with ease, while an adjustable fit ensures the bike grows along with your little rider.

Designed for Young Riders:

Easy-Pedal Cranks — Our pedal cranks are ergonomically correct, proportional to the child's leg length. They also place the pedals closer to the bike's centre so that children can pedal as smoothly and naturally as possible.

Smaller Grips — Our handlebars and grips are narrower diameter so they fit small hands better, for confidence and control as well as better ability to reach the brakes safely.

Faster Tyres — Special edition Nutrak Speedsters with puncture resistance and reflective sidewalls roll comfortably and smoothly.

Lowered Frames — Our frames are lower where it counts, making it easier to get on and off and increasing clearance for greater confidence.

Steering Limiter — To help prevent falls when learning to co-ordinate pedalling and cornering, the steering has a limit stop that helps avoid an over-steering situation.

Designed for Parents:

Supporting Accessory Range — For gifts, customisation or just getting co-ordinated!

Transferable warranty — Our lifetime frame and fork warranty and 2-year parts warranty is transferrable, supporting service and re-sale value. Because these bikes are made to last.

Frequently Asked Questions

What is the Dimension 20 weight vs MX20 weight?

The MX20 weighs 9.6kg, compared to 9.1kg for the Dimension 20 — a weight saving of 0.5kg. Both are significantly lighter than budget steel-framed bikes of the same size, which typically weigh 11–12kg or more.

What are the parts differences between the Dimension 20 and the MX20?

The Dimension 20 has upgraded parts compared to the MX20 that save some weight, for example the aluminium forks, seat post head, chainring; and Shimano shifters with wider-range cassettes fitted to a Shimano rear freehub. The Nutrak Speedster tyres have a puncture-resistant belt and roll a little faster.