Cube Acid 240 Hybrid Rookie Pro 400X actionteam (2027)

CUBE Acid 240 Hybrid Rookie Pro 400X (2027) – Junior Electric Mountain Bike

Product Overview

The CUBE Acid 240 Hybrid Rookie Pro 400X (2027) is a purpose-built electric mountain bike for younger cyclists ready to explore recreational trails and countryside routes. Designed around a child-specific 24-inch platform, it combines Bosch pedal assistance with manageable proportions, Shimano gearing and reliable hydraulic disc brakes.

Finished in CUBE’s distinctive actionteam colour scheme, the bicycle features an Aluminium Superlite frame with Agile Ride Geometry and advanced internal cable routing. Its integrated Bosch battery helps maintain a clean appearance, while the compact motor provides support when young riders tackle hills or longer family rides.

Unlike an adult e-mountain bike, the Acid 240 Hybrid Rookie Pro is carefully proportioned for smaller riders, with a narrower handlebar, shorter cranks and a dedicated junior saddle.

Key Features

• Bosch Performance Line SX Motor: Lightweight pedal-assist system with up to 60 Nm of available torque and assistance limited to 20 km/h.
• Bosch CompactTube 400 Battery: Integrated 400 Wh battery provides energy for assisted recreational cycling.
• 24-Inch Wheel Platform: Designed around the proportions and handling needs of younger mountain bike riders.
• Shimano CUES 9-Speed Gearing: Wide-range 11–46T cassette helps children adapt to climbs and changing terrain.
• SR Suntour Suspension Fork: XCT DS fork delivers 80 mm travel for added comfort over uneven surfaces.
• Shimano Hydraulic Disc Brakes: BR-MT200 hydraulic braking supports controlled stopping.
• Schwalbe Rocket Ron Tyres: Grippy 2.1-inch tyres provide traction on suitable off-road tracks.
• Child-Specific Cockpit: Narrower grips, 590 mm handlebar and shorter cranks help smaller riders maintain a comfortable position.

Motor & Riding Performance

The Acid 240 Hybrid Rookie Pro uses the Bosch Performance Line SX Smart System drive. CUBE identifies the drive unit as a 55 Nm BDU31 model and describes up to 60 Nm of available assistance in its complete bike configuration.

Electric support is provided while the rider pedals, with assistance cutting off at 20 km/h. The system is intended to make family rides and hill climbing more manageable without replacing the rider’s pedalling effort.

The Bosch Purion 200 combines motor controls and a compact integrated display, providing convenient access to riding information and assistance settings.

Shimano CUES 9-speed gearing includes an RD-U4000-GS rear derailleur and an 11–46T cassette. Its wide range allows riders to select a comfortable gear for changing gradients and trail surfaces.

Battery & Range

The Bosch CompactTube 400 battery provides 400 Wh of rated energy capacity and is fixed within the bicycle’s down tube. This integrated construction helps maintain clean frame lines and balanced weight distribution.

A Bosch 2A charger is supplied according to CUBE’s standard specification.

The frame also supports the optional Bosch PowerMore 250 range extender, which is sold separately. The additional battery must not be advertised as included with the standard bicycle.

Riding range depends on motor assistance level, terrain, rider weight, elevation, temperature and riding style. No fixed distance per charge is guaranteed.

Suspension & Braking

An SR Suntour XCT DS suspension fork provides 80 mm of travel, helping reduce shocks from roots, uneven paths and suitable recreational trails.

Shimano BR-MT200 hydraulic disc brakes provide reliable stopping control, while the smaller bike proportions make the controls accessible to younger cyclists.

The 24-inch wheels feature ACID ZX20 tubeless-ready rims and Schwalbe Rocket Ron Kevlar 2.1-inch tyres for traction on appropriate off-road surfaces.

Frame Design & Junior Fit

The Aluminium Superlite frame incorporates Agile Ride Geometry, Boost148 rear spacing, a UDH-compatible gear hanger and advanced internal cable routing.

A CUBE Kids 590 mm handlebar with a 19 mm grip diameter, Natural Fit Kids grips and a junior-specific saddle help the bike fit smaller riders.

CUBE recommends this one-size model for riders approximately 124–141 cm tall, with an inseam of 57–66 cm. These measurements are a guide and do not replace an individual fit check or test ride.

Practical Details & Accessory Compatibility

The frame includes mounting points for compatible mudguards, a luggage carrier and kickstand accessories. It is also prepared for a compatible dropper seatpost.

The optional Bosch PowerMore 250 battery can increase energy capacity for longer rides. Any additional accessories should be selected for the child’s needs and the bicycle’s permitted weight limits.

Why Choose the CUBE Acid 240 Hybrid Rookie Pro 400X?

The CUBE Acid 240 Hybrid Rookie Pro 400X brings together adult-inspired mountain bike technology and carefully selected child-specific dimensions.

With a compact Bosch motor, 400 Wh battery, Shimano CUES gearing, hydraulic disc brakes and 24-inch wheels, it offers a capable introduction to assisted recreational mountain biking for appropriately sized younger riders.