CUBE ACID 240 HYBRID ROOKIE SLX 400X KID'S eBIKE 2026 REEDGREEN' N 'MATRIX

Details matter when you're designing a bike for young riders.

The Acid 240 Hybrid Rookie SLX's Magura MT Thirty hydraulic disc brakes, for example, aren't just powerful. They also feature excellent lever adjustment, so they can be set up perfectly for small hands. Combined with the 19mm-diameter handlebar and the easily adjustable air suspension fork, it's the kind of thing that can make all the difference. A remote dropper post will help give their confidence a boost, and big volume 2.35in Schwalbe Hans Dampf tyres have the grip they'll need to build their riding skills.

And, with pedal assistance up to 20km/h from Bosch's lightweight SX drive and 400Wh battery – delivered via Shimano's smooth 1x11 Cues gears – there's plenty of extra shove on tap for fun family rides.

Key Features

• From its Advanced Internal Cable Routing to its Boost rear axle and UDH gear hanger, the Acid 240 Hybrid Rookie's frame is bursting with exactly the same kind of attention to detail as our adult mountain bikes. T
• Lightweight Bosch SX drive and fixed 400Wh battery sit snugly in the frame, providing up to 55Nm of pedal assistance to a maximum speed of 20km/h.

Full Specification

• Frame: Aluminium Superlite, Agile Ride Geometry, Boost 148, UDH™, Integrated Battery, Advanced Internal Cable Routing, Kickstand/Fender/Carrier Mounting Points
• Fork: SR Suntour Raidon34 2CR Air, Tapered, 15x110, 80mm
• Engine: Bosch Drive Unit Performance SX 55Nm (BDU31)
• Battery: Bosch  CompactTube 400
• Shifters: Shimano Cues SL-U6000, Rapidfire-Plus
• Crankset: Acid MTB Hybrid Pro, 38T
• Cassette: Shimano Cues CS-LG400, 11-50T
• Chain: KMC eGlide
• Front Derailleur: N/A
• Rear Derailleur: Shimano RD-U6000-GS
• Pedals: Cube PP MTB medium
• Wheels: Acid SLX 20, 32/32 Spokes, 15x110mm/12x148mm, Tubeless Ready
• Tyres: Schwalbe Hans Dampf, Addix Performance, Kevlar, 2.35
• Brakes: Magura MT Thirty, Hydr. Disc Brake (160/180)
• Handlebars: Cube KIDS 590mm, Ø 19m
• Bar Grips: Natural Fit Kids Grip, Ø 19mm
• Stem: Cube Aluminium Lite
• Saddle: Cube Kid
• Seatpost: Cube Performance Post, 31.6mm
• Seat clamp: Cube Seatpost clamp
• Weight: 18,2 kg

We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colours, materials and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice.

Bike and frame weights are based on pre-production painted frames at time of publication. Weights may vary in final production.

We offer several delivery options:

Store Collection: Pick up your order at our Salts Mill store, located at BD17 7EH.

Standard Delivery We partner with APC Euro-Tran for deliveries. Once your bike is dispatched, it typically arrives within 1 to 3 working days for Mainland UK. All bikes are fully built, checked, set up and then packed back down into a standard size bike box. Please note that electric bikes will be shipped in two boxes due to weight and size restrictions. We recommend our premium delivery service for electric bikes.

Premium Delivery We partner with DX's two-person delivery team. After dispatch, your bike usually arrives within 2 to 4 working days for Mainland UK. DX will contact you before delivery to schedule a convenient delivery date. All bikes come fully built, checked, set up and with both wheels attached. Trek bikes can only be sent via our premium delivery service.

Check out our video for more information on how your bike is assembled and packaged. 

At All Terrain Cycles, we want you to ride with confidence every time. To ensure your bike or e-bike stays in peak condition, here are some essential safety and maintenance tips.

Bicycle Safety 

Always wear a helmet – Safeguard against head injuries by using a properly fitted, safety-certified helmet.

Perform pre-ride checks – Before each ride, verify that brakes, tyres, and gears are in good working order.

Stay visible – Utilise lights and reflective gear when cycling in low-light conditions.

Follow road rules – Ride responsibly and remain aware of your surroundings.

Aftercare for Your New Bike Initial Check-Up (First 50-100 miles)

Gear Adjustment – New cables may stretch slightly; have a qualified mechanic check and adjust them.

Brake & Wheel Check – Inspect brakes for wear and ensure wheels are aligned properly.

Lubrication – Apply chain oil and check bolt tightness to maintain smooth performance.

Tyre Pressure – Regularly monitor to prevent flats and enhance efficiency.

Pedals - Ensure pedals are still tight and correctly fitted.

Routine Maintenance (Every Few Weeks)

Chain Care – Clean and lubricate your chain to minimise wear and prolong its life.

Brake Safety – Check brake pads and responsiveness before each ride.

Tyre Inspection – Look for punctures and ensure correct air pressure.

Handlebar & Stem Alignment – Confirm they are tight and secure to prevent instability.

Frame Safety Check – Look for any signs of damage or cracks.

Pedals - Ensure pedals are still tight and correctly fitted.

Professional Check-Ups

Have your bike serviced at least once a year, or more frequently if you ride often.

Aftercare for Your New Electric Bicycle (e-Bike) Initial Check-Up (First 50-100 miles)

Battery Care – Fully charge your battery (if required) before the first ride and store it in a dry, moderate-temperature environment.

Avoid Overcharging – Unplug the charger once fully charged to extend battery life.

Pedals - Ensure pedals are still tight and correctly fitted.

Routine e-Bike Maintenance (Every Few Weeks)

Motor Inspection – Listen for unusual noises and ensure smooth operation.

Battery & Connection Checks – Inspect cables and connectors for dirt, moisture, or damage.

Pedals - Ensure pedals are still tight and correctly fitted.

Seasonal e-Bike Maintenance

Check Electrical Components – Ensure wires and connections are clean and secure.

Professional Servicing – Have your e-bike inspected at least once a year or every 500-1000 miles for optimal performance.

By following these aftercare guidelines, you’ll help ensure that your bicycle runs smoothly, lasts longer, and remains a joy to ride. Stay safe and enjoy the ride!

Read our full advice

If you have any problems or concerns: Contact All Terrain Customer Services on 01274 588488 or email sales@allterraincycles.co.uk