Cube Stereo Hybrid One44 SLT test: Lightweight luxury all-rounder - best e-bike for mountain tours?

The Stereo e-MTBs from Cube have been completely redesigned for 2025. New Bosch motor, new 800 battery, new frame design. What has remained is the 29er set-up, the 150/140 mm travel and the material mix of carbon main frame and aluminium rear triangle. In this test, we took a close look at the top model Stereo Hybrid One44 SLT. Here, too, Cube remains true to its maxims: You can get an absolutely high-end spec for a comparably fair 8499 euros (e.g. currently available at a reduced price here).

The sophisticated set-up is also noticeable in the weight. Despite the large battery, which can be easily folded out of the down tube, the scales remain at 23 kilos. With the Powertube 600, which also fits into the mount, the Cube would even be the lightest bike in the test at 22.1 kilos. This is despite the fact that the rear triangle is made of aluminium and the battery is easily removable.

In the video: BIKE checks out the Cube Stereo Hybrid One44 SLT

The facts about the Cube Stereo Hybrid One44 SLT

• Motor: Bosch Performance CX, 85 Nm max. torque
• Battery: 800 Wh (removable)
• Frame material: carbon / aluminium
• Suspension travel: 150 / 140
• Wheel size: 29 inch
• Frame sizes: S, M, L, XL
• Price: 8499 Euro >> available here at a reduced price
• Weight: 23.0 kg (test bike in size L, EMTB measurement)
• Max. System weight: 144 kg
• Warranty: 2 years

The e-bike drive

E-mountain bikes from Cube traditionally rely on Bosch motors. It goes without saying that the relaunched all-mountain classic also comes with the newly refreshed Bosch Performance CX. Read on to find out what has changed with the popular Bosch unit in our detailed practical and laboratory test of the Bosch Performance CX here in the link.

In terms of battery technology, Cube relies on the large Powertube with 800 watt hours. This can be removed quickly and easily. Optionally, the smaller and lighter (-900 grams) Powertube 600 also fits in the bike. However, all models come from the factory with the full 800 watt hours. The battery is secured with a key and sat absolutely rattle-free on our test bike. This was not always the case with previous Cube generations.

The geometry

The geometry of the Stereo Hybrid is rather moderate. The steering angle is moderate and the chainstays are quite long. This should make the bike neutral and easy to control. The rather slack seat angle, which stretches the rider slightly longer over the bike, is striking. For more freedom of movement, Cube has shortened the seat tube on the new edition. This means that longer dropper posts now also fit in the One44 models.

BIKE measurements at a glance (frame size L)

• Seat tube length: 413 mm
• Wheelbase: 1265 mm
• Reach: 474 mm
• Stack: 638 mm
• Steering angle: 64.8 degrees
• Seat angle: 75.8 degrees
• Chainstay length: 456 mm

The features of the Cube Stereo Hybrid One44 SLT

This is how we know the bikes from Cube: In a market comparison, the equipment sets highlights! Super light Impellers made of carbon, Fox FactoryChassis and Sram-XX1-Radio control. Plus carbon handlebars and cranks - that's as good as it gets. No other bike in our large comparison test of high-end e-mountainbikes delivers so much glamour, and the One44 is still one of the more affordable candidates.

• Fork / Shock: Fox 36 Factory Grip X2 / Float X Factory
• Gear system: Sram XX1 Eagle Transmission
• Brakes: Magura Gustav Pro / 203/203 mm
• Wheels: Newmen Phase 30 Carbon
• Tyres: Schwalbe Magic Mary/Nobby Nic SuperTrail Soft, 29 x 2.40
• Seatpost / Stroke: Fox Transfer Factory / 180 mm
• Special features: integrated smart light connection, adjustable steering angle

Practical test: How the Cube Stereo Hybrid One44 SLT rides

The One44 has inherited the high level of riding comfort from its predecessor, the Stereo 140. Both the fluffy suspension and the touring riding position with a high front and rather flat seat angle are pleasant on long rides covering many kilometres. The fast-rolling rear tyre and the long range of the Bosch system also score points here.

The One44 is nimble on the trail. The extremely light wheels provide lively handling and make the bike feel lively. Even at slow speeds, it never feels cumbersome. This stands out in the test comparison.

However, really sporty trail manoeuvres such as bunny hops over rock gardens or even manuals are not among the bike's strengths. The long chainstays make it too difficult to take the weight off the front.

The Cube Stereo Hybrid One44 is more of a powerful tourer than a racy supersports bike. It can't keep up with the best in the test on rough descents, as it doesn't sit as firmly on the trail. However, the suspension, especially the high-end fork, defuses even the roughest bumps with ease.

Pleasantly, the bike not only remains the master of the situation, but also quite quiet. Here the new edition is a big step forwards! Only the brake pads of the Magura stoppers jingle quietly.

Even uphill, the Stereo One44 is not easily rattled. The rear works with great traction, the motor pushes powerfully and with good control. Thanks to the longer chainstays, you don't have to perform any acrobatics on the bike on steep sections to keep the front wheel on the ground.

For even better climbing performance, however, we would have liked a grippier rear tyre and a steeper seat angle and thus a more active riding position.

BIKE review of the Cube Stereo Hybrid One44 SLT

Strengths

• Lightweight, despite 800-cell removable battery
• Outstanding equipment
• Convenient and uncomplicated

Weaknesses

• Flat seat angle
• narrow rear tyre limited off-road

The BIKE conclusion from editor Florentin Vesenbeckh

The new Cube Stereo Hybrid One44 is the epitome of a classic all mountain bike. Good weight, long range, high riding comfort - making long tours fun. On the trail, the bike performs confidently and is easy to manoeuvre. However, the SLT version is a long way from the riding power of an enduro bike. - Florentin Vesenbeckh, BIKE Editor