The Ridgeback Dimension 20 is a lightweight and capable children’s bike built for confident young riders aged around 6 to 9 who are ready to explore further and ride more independently. Combining a premium aluminium frame with high-quality components, it offers smooth handling, reliable braking and easy gearing to support growing cycling skills.
The butted 6061 heat-treated aluminium frame and fork keep the bike light and responsive, helping young riders maintain control while building confidence. A 7-speed Shimano drivetrain introduces gearing for the first time, allowing riders to tackle hills, longer rides and varied terrain with ease.
Fast-rolling 20-inch alloy wheels paired with grippy tyres provide stability and efficiency across paths, parks and light trails. Reach-adjustable brake levers and dependable alloy V-brakes deliver confident stopping power designed specifically for smaller hands.
With child-focused geometry, adjustable components and durable construction, the Ridgeback Dimension 20 is designed to grow with young riders and support their cycling adventures for years to come.
Key Features & Benefits:
- Lightweight Aluminium Frame and Fork: Premium aluminium construction keeps the bike light, strong and easy for young riders to control.
- 7-Speed Shimano Drivetrain: Wide-range gearing helps kids tackle hills and longer rides with confidence.
- Kid-Friendly Braking and Controls: Reach-adjustable brake levers and alloy V-brakes provide safe, reliable stopping power.
Specification:
- Frame: Butted 6061-T6 heat-treated aluminium
- Fork: 6061-T6 heat-treated aluminium
- Number of Gears: 7
- Gear Shifters: Shimano SL-M315 trigger shifter
- Rear Derailleur: Shimano RD-TY200 short cage with protective bash guard
- Chainset: Forged aluminium
- Crank Length: 114mm
- Chainring: 34T aluminium with double chain retention discs
- Rear Cassette: Shimano CS-HG210 7-speed, 12–32T
- Chain: KMC silver/grey finish
- Bottom Bracket: Thun Germany sealed bearings, CrMo 113mm axle
- Pedals: Nylon resin compact pedals with ball bearings
- Brakes: Aluminium V-brakes with adjustable linear spring
- Brake Levers: Promax BL367-AL reach adjustable aluminium body
- Rims: Aluminium with machined sidewalls and wear indicators, 32H front and rear
- Front Hub: Aluminium with M6 bolted axle
- Rear Hub: Shimano FH-N300 freehub with nutted axle
- Front Tyre: Nutrak by Vee Speedster 20" x 2.0", reflective strip, flat-resistant belt, tan sidewall
- Rear Tyre: Nutrak by Vee Speedster 20" x 2.0", reflective strip, flat-resistant belt, tan sidewall
- Handlebars: 520mm width, 40mm rise, 10° sweep
- Handlebar Tape: N/A
- Grips: Velo Kraton rubber grips, 19mm
- Stem: 40mm length, 10° rise
- Saddle: Madison Junior saddle with soft PU foam padding
- Seatpost: 27.2 x 250mm aluminium
- Additional Features: Rear derailleur bash guard, bell, front and rear reflectors, wheel reflectors
Manufacturers reserve the right to change specifications without notice based on availability at the point of assembly.
Information for Ridgeback kids bike range:
Easy-pedal cranks [All models except Scoot and ScootXL]– Ridgeback's 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 – Ridgeback's 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.
Lowered frames – Ridgeback's frames are lower where it counts, making it easier to get on and off and increasing clearance for greater confidence.
Steering limiter [All models except Scoot and Dimension 27.5] – 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.
Better brakes – Brake levers are closer to the bars and adjustable for reach to suit smaller hands, and work perfectly with our smaller diameter grips.
Size Chart for Ridgeback Kids Bikes
| Wheel Size | Scoot | Scoot XL | 14" | 16" | 20" | 24" | 27.5" |
| Height | 86-103 cm | 95-110 cm | 90-102 cm | 100-115 cm | 112-130 cm | 128-146 cm | 144-162 cm |
| Inside Leg Range | 34cm to 45cm | 40cm to 50cm | 37cm to 44cm | 43cm to 53cm | 50.5cm to 61cm | 60cm to 70cm | 69cm to 77cm |
| Approx Age | 2-4 | 3-5 | 2.5-4 | 3.5-6 | 5.5-8.5 | 8-11.5 | 11+ |
Warranty Information for Ridgeback:
Ridgeback steel and aluminium frames and forks are all covered by a lifetime warranty, and this is transferrable to a second owner.
Ridgeback branded components are covered for two years.
For full warranty policy please visit https://www.ridgeback.co.uk/warranty