CUBE Stereo Hybrid ONE77 HPC SLX 800 review

Where the Stereo Hybrid ONE77 HPC SLX 800 fits

The clearest match is experienced e-MTB riders tackling steep, rough enduro trails and bike-park terrain who understand the handling and maintenance demands of a 170mm full-power machine. This review is based on the Evans specification, manufacturer information and clearly identified independent coverage; it is not presented as a RideIn hands-on test.

Motor, controls and UK legality

Evans lists Bosch Performance Line CX, Up to 120 Nm.. The controls are described as Bosch Kiox 400C Integrated Display.

The Performance Line CX system is listed at up to 120Nm and pairs with a Shimano XT twelve-speed 10–51T transmission. That combination gives strong climbing assistance, but on technical ground the controllability of the selected mode is more valuable than maximum output alone.

The integrated Kiox 400C keeps information protected and visible, while Bosch diagnostics and software support require an authorised workshop. Riders should practise low-traction starts because the mullet rear tyre can spin if torque is applied abruptly.

For use as an electrically assisted pedal cycle in Great Britain, the maximum continuous rated motor power must not exceed 250W, assistance must cut out by 15.5mph and the pedals must be able to propel the bike. Check the label and delivered configuration rather than relying on a category name.

Battery, charging and realistic range

The listed battery is Bosch PowerTube 800 Wh. No numerical range is stated in the accessible listing; route, rider, weather and assistance level materially affect distance

An 800Wh PowerTube is appropriate for a heavy, high-grip bike expected to repeat steep climbs. Range still falls quickly in maximum assistance on soft ground, and the capacity should be viewed as elevation budget rather than a fixed mileage promise.

Charging information in the Evans specification is incomplete, so refill time should be confirmed with the supplied charger. Battery removal procedure, transport security and storage temperature are also worth learning before the first remote trail day.

Use only the approved compatible charger, charge away from escape routes and stop using a battery that is damaged, swollen, leaking or unusually hot. Ask for the replacement-pack price and warranty conditions before the original battery becomes a problem.

Frame, fit and ride character

The frame specification is C:62® Carbon Front Triangle, Aluminium 6061 T6 Rear Triangle, FSP 4-Link Suspension, Agile Trail Geometry, Boost148, UDH™, Integrated Battery, Internal Cable Routing. Fork and suspension details are Fox 38 Float Rhythm GRIP, 170mm Travel. The tyres are Front: Continental Argotal 29x2.4; Rear: Continental Kryptotal 27.5x2.4.

A Fox 38 Rhythm fork and Float X Performance shock provide 170mm front and rear, while the 29-inch front wheel rolls through holes and the 27.5-inch rear improves clearance and agility. The geometry is designed for speed and steep terrain, not gentle urban manoeuvrability.

Shimano XT hydraulic brakes with 203mm rotors and aggressive Continental Argotal/Kryptotal tyres match the intended use. Independent ONE77 family testing finds exceptional downhill capability and value, but also a narrow audience: the bike rewards riders who can actively manage its long-travel handling.

Brakes, transmission and everyday equipment

The accessible listing does not identify the brakes precisely. Transmission is Shimano XT 12-Speed; Shimano XT Shadow Plus 12-Speed; Shimano XT 10-51T. Evans does not provide a complete equipment list in the accessible listing.

A remote dropper, tubeless-ready Newmen wheels and angle-adjustable chassis details make it ready for serious trail setup. Suspension pressure, rebound, tyre pressure and cockpit position should be professionally established rather than left at delivery defaults.

For commuting or easy leisure routes, its weight, rolling resistance, travel and specialised tyres are disadvantages rather than benefits. Carbon inspection, suspension servicing, brake pads and rear tyres all add to the running-cost profile.

What the published evidence tells us

Evans listed this build at £4,499 when RideIn checked it on 29 August 2026. Prices can differ by colour or size, and stock can change; a discount against a reference price does not by itself establish value.

The Evans listing and CUBE’s official exact page establish the SLX build’s motor, battery, mixed wheels and Fox/Shimano equipment. Independent reviews may test the related TM specification, so conclusions about the ONE77 chassis are separated from component claims unique to the SLX.

Velomotion’s family test supports the themes of formidable descending ability, strong value and a focused target rider. It does not justify claiming that every rider will find the bike easy or that it replaces a downhill bike in competition settings.

Advantages and disadvantages

The useful comparison is whether the complete build suits the regular route, storage and service plan. A premium motor cannot compensate for poor fit, while a modest component can be entirely sensible on the right type of bike.

• Advantage: Serious 170mm Fox suspension
• Advantage: Strong XT brakes and drivetrain
• Advantage: Mullet wheels and enduro-focused tyres
• Advantage: Bosch CX drive with 800Wh capacity
• Disadvantage: Over-specialised for commuting and easy trails
• Disadvantage: High weight and rolling resistance
• Disadvantage: Greater suspension and tyre running costs
• Disadvantage: Demands experienced setup and handling

Buying checks and RideIn verdict

Confirm the exact product code, frame size, colour, battery capacity, assistance configuration and included equipment before paying. Ask which Evans branch or authorised dealer will handle electrical diagnosis, warranty labour and replacement components, then test the brakes, controls and fit before committing to regular use.

The ONE77 HPC SLX is the right CUBE only when the terrain genuinely justifies it. For committed enduro riders it offers credible control and climbing support at a competitive specification; for everyone else the ONE44 is more balanced and easier to live with.