The Ridgeback Dimension 27.5 is designed for older kids and young riders who want the performance and feel of a full-sized bike in a smaller, confidence-inspiring package. Ideal for riders aged around 11 and up, it bridges the gap between children’s bikes and adult bikes with larger wheels, quality components and a versatile gear system.
Built around a butted 6061 heat-treated aluminium frame and fork, the Dimension 27.5 offers a lightweight yet durable platform that’s easy to control and comfortable on longer rides. Full-size 27.5-inch wheels provide smooth rolling and improved stability, helping riders tackle longer routes and mixed terrain with confidence.
A wide-range Shimano 8-speed drivetrain gives riders the flexibility to handle steep climbs, headwinds and varied terrain with ease. Gravel-style tyres with reflective detailing and a puncture-resistant belt add grip, durability and visibility for everyday riding across lanes, paths and countryside tracks.
With adjustable components, reliable braking and durable construction, the Ridgeback Dimension 27.5 is built to grow with young riders and keep up with their biggest cycling adventures.
Key Features & Benefits:
- Lightweight Aluminium Frame and Fork: Butted 6061 aluminium construction keeps the bike strong, durable and easy for young riders to handle.
- Wide-Range Shimano 8-Speed Gearing: Large cassette range helps riders tackle hills and longer rides with confidence.
- Versatile Gravel-Style Tyres: Fast-rolling tyres with puncture protection provide grip and reliability on roads and tracks.
Specification:
- Frame: Butted 6061-T6 heat-treated aluminium
- Fork: 6061-T6 heat-treated aluminium
- Number of Gears: 8
- Gear Shifters: Shimano SL-M315 trigger shifter
- Rear Derailleur: Shimano Essa RD-U2000-8 SG with protective bash guard
- Chainset: Forged aluminium
- Crank Length: 140mm
- Chainring: 36T aluminium with double chain retention discs
- Rear Cassette: Shimano CS-HG400 8-speed, 11–45T wide range
- Chain: KMC silver/grey finish
- Bottom Bracket: Thun Germany sealed bearings, CrMo 119mm 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 double-wall rims 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 27.5" x 1.95", reflective strip, flat-resistant belt, tan sidewall
- Rear Tyre: Nutrak by Vee Speedster 27.5" x 1.95", reflective strip, flat-resistant belt, tan sidewall
- Handlebars: 640mm width, 40mm rise, 10° sweep
- Handlebar Tape: N/A
- Grips: Velo Kraton rubber grips with locking collar
- Stem: 40mm length, 10° rise
- Saddle: Madison Junior saddle with soft PU foam padding
- Seatpost: 27.2 x 350mm 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