Cube Kathmandu Hybrid Comfort SLX

If your riding is the commute, a leisure loop and a luggage-carrying tour, the 2026 Comfort SLX 800 is set up to make that straightforward. Automatic hub gears and a clean belt take care of the transmission, and the bike is equipped for roads and less-smooth routes with luggage on board. You then choose a high top tube or a low step, which comes down to how you get on and how willing you are to lift the bike.

Gears that look after themselves

Classic and Easy Entry both use an automatic Enviolo hub and a Gates belt. On the Classic frame the hub is the Enviolo Trekking Automatiq, a stepless unit with a 380% ratio range, running a Gates CDX belt of 128 teeth. You leave the shifts to the hub, which suits stop-start traffic and a loaded bike. The ratio spread is wide, and there are no fixed steps to click through as the gradient or the load changes.

A clean, low-mess belt is a large part of living with this bike through rain, shopping and overnight stops. The Kathmandu Hybrid SLX is the one with XT Di2 derailleur gears, if that is the shifting you want. A newer Deluxe SLX listing is the one that advertises ABS. This Comfort SLX is the automatic, belt-drive bike, and those other names are not interchangeable with it.

The automatic step up from the Comfort Pro

Pick the Comfort SLX when you want the bike to change gear for you. It pairs the automatic Enviolo hub with a Bosch Kiox 500 display, an LED Remote and Shimano XT brakes. The 2026 Comfort Pro also uses a belt and an Enviolo hub, and you shift that one yourself with a twist shifter, alongside a Purion 200 display and MT200 brakes. It's the same broad idea of a belt-drive Kathmandu, with the SLX taking care of the gear changes and stepping up the display and the brakes.

Cube's official UK RRP is £4,499 for the Comfort SLX Classic and Easy Entry frames, and £3,499 for the Comfort Pro. Those are list prices. A current offer can close the gap, and it can also make the Pro the dearer bike on the day, so the RRPs show how Cube positioned the two rather than what you will pay.

High top tube or low step

The Classic frame is Aluminium Superlite with a high top tube, in 50, 54, 58, 62 and 64cm, quoted at 28.2kg. Easy Entry is the low-step Aluminium Superlite, in 46, 50, 54, 58 and 62cm, quoted at 30.3kg. Each figure is the quoted weight for that frame record, so use it for the shape rather than as a weight for every size. Both have an official UK RRP of £4,499. Easy Entry makes sense when you want to step through the frame, or when 46cm is the size you need. Classic makes sense when you want the high top tube, the 64cm size, or the lower quoted weight.

Keep each size with its frame. At 54cm the Classic reach is 410mm and the stack is 654mm, while the Easy Entry reach is 390mm and the stack is 685mm. The other overlapping sizes have their own reach and stack too, so the frame shape belongs in the fit decision as much as the centimetre label. Cube publishes that geometry without a rider-height or inseam band for either 2026 frame, so reach and stack are the comparison you have. A third official frame record for this generation carries an 800Wh battery and belt-driven automatic Enviolo hub gearing. Frame shape, official UK price, complete build and sizes for that record are not established, so a Classic or Easy Entry offer is covered by the specification for the frame it names.

Assistance, luggage and the kilos you lift

Both documented frames use a Bosch Performance Line CX motor, the BDU38, rated to a maximum 90Nm, with a PowerTube of 800Wh. Treat the 90Nm as the maximum torque rating and the 800Wh as battery capacity. Neither figure is a promised mileage, so they will not tell you how far a particular commute or tour will go.

On the Classic frame the PowerTube is removable, a Bosch 4A charger is specified, and Cube says you can charge the battery on the bike or take it off. That helps when the only socket is indoors.

Bags go on the Integrated Carrier 3.0 with its spring clamp, fitted to both frames. Cube describes the carrier as RiLink-adaptor-ready for compatible bags or baskets. That is an upgrade route: the adaptor is not supplied simply because the carrier can take one. Lights, mudguards and an adjustable stem are fitted on both frames, and the stem gives you some room to set the bar position once the size is chosen. The 2026 Comfort SLX has published limits of 125kg for the rider, 25kg for the carrier and 160kg for the whole system. They apply together. A heavy rider and a full rack can meet the system limit while each separate allowance still looks comfortable, so count the bike, the rider and the luggage as one load.

You'll notice the weight as soon as the bike has to be moved off the ride. Cube quotes 28.2kg for the Classic record and 30.3kg for Easy Entry, before any luggage. That mass includes a 100mm Fox 34 Float AWL fork and a suspension seatpost on both frames, plus Shimano XT hydraulic discs. It's a lot of bike to lift onto a rack, into a car or up a flight of stairs. For the commuting and loaded tours it is built for, that's the trade for assistance, suspension and a carrier already on board. If you carry the bike as often as you ride it, the quoted weight is the thing that can tip the decision.