Ridgeback Dimension 20" Kids Bike

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4001858
  • Triple-butted alloy frame
  • Shimano Tourney 7-speed drivetrain
  • Promax TX-107C alloy V-brakes
£0.00
Excl. Tax: £0.00
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Built with care: Our mechanics fully assemble your bike before it's carefully packaged and shipped to you.

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At Tweeks Cycles, we ensure your bike arrives fully assembled and, most importantly, well packaged so it arrives with you as it left us.

Upon delivery, simply unpack it, attach any included pedals (believe it or not, some bikes don’t come with pedals!), adjust the handlebars, and you're ready to ride!

It’s all super simple!

BUT! Please take extra care when fitting any pedals that are provided with your bike. Pedals are side specific and MUST be fitted to the correct side of the bike. They are usually clearly labelled Left and Right. Failure to do so will permanently damage the bike, void the bikes warranty and lead to many tantrums, for children or grown children alike!

Comprehensive 14-Point Inspection

Each bike undergoes a meticulous 14-point inspection to guarantee optimal condition and performance:

  • Ensure Cycle is free of any mechanical damage, paint chips or missing parts
  • Grease seat tube, secure seat clamp, make sure the saddle is level and ensure all fixings are secure
  • Ensure handlebar, stem and brake/gear levers are secured
  • Assess headset for play or tightness
  • Ensure handlebar tape or grips are fitted securely
  • Ensure wheel nuts, quick-release levers or through axles are tightened (please note: some adult mountain bikes come with the front wheel removed for transport), true the wheels for optimal alignment and check wheel bearings for proper adjustment
  • Inflate tyres to the correct pressure
  • Ensure front and rear brakes operate correctly. Bleed hydraulic brakes if required
  • Ensure pedal threads are greased
  • Test all gears to ensure smooth operation
  • Check suspension system for correct operation and ensure bolts are tight (if required)
  • Ensure smooth bottom bracket rotation with no free play and secure crank bolts
  • Check cable/house routing and that cable ends are fitted
  • Install reflectors and bell (to be done by customer)

This thorough process ensures your bike is in peak condition upon arrival. We do not fit mudguards or other accessories prior to shipping as these are likely to be damaged in transit.

Note on Electric Bikes

Due to shipping restrictions, in some circumstances you may receive your new electric bike and its battery separately. This is due to carriage restrictions on some removable batteries.

Note on Balance Bikes

Balance bikes are shipped unassembled, allowing you to enjoy the building experience and retain the original packaging-perfect for gifting.

Details

The Ridgeback Dimension 20" Kids Bike is a lightweight, durable bike built to give young riders aged 6 to 9 a smooth, controlled ride. Its 6061 heat-treated aluminium frame keeps weight low while maintaining strength for everyday use. This makes the bike easier for children to handle, steer, and control. With stable 20-inch wheels, reliable V-brakes, and simple 7-speed gearing, it gives growing riders the tools they need to ride further and build confidence on every journey.

Key Features and Benefits:

  • 6061 heat-treated aluminium frame: This lightweight but strong frame reduces the overall bike weight while maintaining structural durability. The lower weight makes it easier for young riders to control the bike, lift it when needed, and maintain balance, which leads to greater confidence and smoother riding progression.
  • 20-inch alloy wheels with Vee Speedster 2.0 tyres: Strong alloy rims paired with wide multi-surface tyres provide reliable grip and stability. The larger air volume helps absorb small bumps while maintaining fast rolling speed, allowing children to ride comfortably on pavements, paths, and playground surfaces.
  • Promax TX-107C alloy V-brakes with Tektro brake levers: These responsive braking components deliver consistent stopping power while remaining easy for smaller hands to operate. This ensures young riders can control their speed safely, helping them develop proper braking technique and confidence in different riding situations.
  • Shimano Tourney 7-speed drivetrain with Rapidfire shifter: The Shimano Tourney rear derailleur and Rapidfire trigger shifter offer simple, reliable gear changes. This allows children to adjust pedalling effort easily when riding uphill or on longer rides, helping them maintain steady momentum and ride for longer distances.
  • Child-specific geometry with adjustable cockpit: The frame design, combined with adjustable saddle height and handlebar position, creates a riding position suited to younger riders. This supports good balance and comfort, which helps reduce fatigue and improves control during longer rides.
  • Quality junior components throughout: Durable parts such as the Samox crankset, KMC Z7 chain, and Rigida alloy rims are designed to handle regular use. This reliable component setup ensures smooth operation and long-term durability, giving parents confidence the bike will perform consistently as children improve their skills.

A lightweight and well-balanced bike helps young riders develop control, confidence, and independence on two wheels. The Dimension 20 focuses on low weight, reliable shifting, and easy braking so children can manage the bike without unnecessary effort. The combination of quality components and stable geometry supports steady skill progression while keeping the ride smooth and predictable.

The Ridgeback Dimension 20 is designed to support young riders as they grow in confidence and ability. Its lightweight build, dependable components, and comfortable fit make it a strong choice for everyday riding, weekend adventures, and developing cycling skills.

Size Guide: Child Height - 120-140cm

Specification

FrameAlloy
Bottom BracketSamox BB-Alloy 68/118mm
Brake LeversTektro TX-316AG
BrakesPromax TX-107C V-Brake
Cassette Shimano CS-HG200-7 12-28T
ChainKMC Z7
Chain SetSamox SAC-30D / 32T / 114 mm
Fork6061 Heat Treated Aluminium
GripRidgeback
Headset Ridgeback Alloy 1 1/8
Pedals Resin Junior
RimsRigida 20 / 32h"
SaddleRidgeback
Seat PostAlloy 27.2 x 250 mm
Rear DerailleurShimano Tourney RD-FT35A
Shifters Shimano SLM310 Rapid Fire 7 Speed
SpokesSteel 14g
StemAlloy / 40mm 1 1/8" / 31.8mm Barbore
TyresVee Speedster 20 x 2.0
Wheel Size20 Inch

Colour Red, Teal

BrandRidgeback
MPN(s)RB22870, RB22871

Customer Reviews
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Finance

Our Payment Options

Maestro Mastercard Visa PayPal V12 Retail Finance Clearpay

Online we currently accept payment from the methods listed above including a wide range of finance options. In store we also accept payment in the form of cash and gift vouchers.

Finance Options

In order to get the kit you want, when you need it, we offer a highly flexible range of finance options to help you get the best products on your bike now rather than at the end of the season when you've saved up the cash to make the purchase. There are even interest free options which effectively spread the cost without costing you any extra.

D.T.(Automotives) Limited T/A Tweeks Cycles is authorised and regulated by the Financial Conduct Authority and is the broker and not the lender. Our FCA registration number is 689896. D.T.(Automotives) Limited offers credit products from Secure Trust Bank PLC trading as V12 Retail Finance, Klarna and Clearpay. Credit is provided subject to affordability, age and status. Minimum spend applies. Not all products offered by Secure Trust Bank PLC are regulated by the Financial Conduct Authority. Klarna is unregulated credit. Clearpay is unregulated credit, use responsibly, T&Cs & late fees apply.

Delivery & Returns

UK Mainland Delivery Prices

Delivery Type Cost Estimated Delivery Time
Standard Delivery for orders under £49.99 from £1.33 2-3 working days from day of despatch(Excludes weekends and Bank Holidays)
Standard Delivery for orders over £49.99 Free
Bike Delivery Free 3-5 working days from day of despatch *(Excludes weekends and Bank Holidays)
Express Delivery from £1.68 1-2 working days from day of despatch(Excludes weekends and Bank Holidays)
Special Delivery from £12.54 For any next working day delivery order before 4.30pm Monday to Thursday.
For any weekend delivery order before 4.30pm Friday

* Bike Delivery Info

A bike has to go though a Pre Delivery Inspection (PDI Check) prior to despatch, ensuring the bike is thoroughly checked and set up prior to you receiving. This also means an express delivery service is unavailable. We strive to despatch bikes within 3-5 working days. Please note this may change over school holidays and the festive season (November/December). For more information on the process please visit our pre-build page.

For international shipping please visit our delivery page.

For information about returning an item please visit our returns page.