Moustache Xroad FS 6 review: A month in the Swiss Alps convinced me this is the ultimate family e-bike

Each summer, my family and I swap London life for a month in the Swiss mountain resort of Klosters. We usually choose to drive, allowing us to load the car with all the gear we need for our adventures, not least our bikes. With two children's bikes in the roof box and another three on the towbar-mounted rack, we make the 1,000km journey and settle in.

As a keen road cyclist, I've spent years exploring the surrounding mountain passes, but electric bikes have transformed what we're able to do together as a family, opening up a whole new world of adventures.

This summer, my wife and I shared the Moustache Xroad FS 6, using it extensively, often several times a day, for everything from half-mile supermarket dashes to family excursions deep into the mountains.

At times, that meant transporting four of us on a single bike: one adult pedalling, our one-year-old in a rear-mounted child seat and our four- and six-year-olds in a double trailer behind, with picnic supplies squeezed in alongside them.

It's quite a load for one bicycle, and I occasionally wondered whether we were asking too much of it. But the Moustache took it all in its stride, the powerful Bosch motor making remarkably light work of the mountain climbs. By the end of our stay, it had become an indispensable part of our holiday.

Moustache Xroad FS 6 review

Price and availability

French manufacturer Moustache was founded in 2011, with its electric bikes designed and assembled in the Vosges region of eastern France.

The brand’s extensive range spans everything from longtail cargo bikes to sporty road machines, but the Xroad is its do-it-all electric hybrid, designed to be equally at home on the daily commute, country lanes or gravel trails.

There are seven models to choose from: four front-suspension versions, from the entry-level ES to the progressively better-equipped 2, 4 and 6, plus three full-suspension (FS) models, which add a rear shock absorber for greater comfort and control on rougher terrain.

The FS 6 sits at the top, starting at £4,199 with a 600Wh battery, or £4,499 with the larger 800Wh option, compared with £3,499 for the FS 2 and £3,899 for the FS 4. The additional outlay brings Bosch's more powerful Performance Line CX motor, a larger Kiox 500 display and upgraded Magura hydraulic disc brakes.

I borrowed the bike from the excellent team at Fully Charged (https://www.fullycharged.com/moustache-samedi-27-xroad-6-fs-2026/) whose cavernous showroom near London Bridge is a hive of activity. If you’re considering a Moustache, it’s well worth a visit to get hands-on with the different models and work out which best suits your needs.

Another contender is Haibike's ADVENTR 6, which costs £3,699 and offers full suspension and an 800Wh battery, albeit with a less powerful Bosch Performance Line PX motor. The top-spec FS 6 isn't the cheapest option, then, but its extra muscle proved particularly valuable in the mountains.

Design and build quality

At first glance, the Xroad FS 6 has something of a mountain bike about it, with chunky tyres, a substantial aluminium frame and suspension at both ends. Yet its more upright riding position, low step-through design and generous array of practical accessories make it ready for much more than weekend trail riding.

It's a good-looking bike, too, with a smart matt finish and clean frame lines that disguise its considerable bulk.

The step-through frame was an immediate winner with both my wife and me, particularly with a child seat mounted behind the saddle. Swinging a leg over the rear simply wasn't an option, so being able to step through the frame made mounting and dismounting with a child aboard considerably easier.

Another brilliant feature is the dropper seatpost, operated by a thumb lever on the handlebars. Press it and the saddle rises; apply your body weight and another press lowers it again. At 167cm, my wife was comfortably accommodated by our medium-sized test bike, while at 188cm I'm better suited to a large.

Nevertheless, this quick and easy adjustment meant we could swap throughout the day without tools. For our relatively short excursions, it worked perfectly, although I would want the larger frame for several hours in the saddle.

I'd initially feared the full suspension would do little more than add unnecessary weight, but it proved a revelation. With 120mm of travel up front and 115mm at the rear, it might sound excessive for family cycling, but even the riverside gravel trails were peppered with potholes, cattle grids and rocky sections.

The suspension soaked up substantial jolts, particularly on faster descents, making for a noticeably smoother ride than a conventional hardtail. I'm sure my one-year-old appreciated it too, frequently dozing off in the child seat behind me, seemingly oblivious to the bumps beneath us.

We also had Moustache's optional £200 suspended luggage carrier, with MIK HD and QL3 mounting systems for compatible child seats, panniers and other accessories. It's an upgrade I'd wholeheartedly recommend.

Our Thule Yepp 2 Maxi child seat attached easily, and I switched out the standard rear thru-axle with a trailer-compatible version (172mm long with a 1.5mm thread pitch; I purchased this one), allowing us to hitch up a Thule Chariot Cross 2 double trailer. This made for an extraordinarily versatile setup, allowing us to transport all three children or use the trailer for larger supermarket shops.

Elsewhere, mudguards, integrated lights, a sturdy kickstand and built-in frame lock make the Xroad an impressively practical everyday machine.

The only real downside is its weight, at around 27–29kg depending on battery and frame size. Lifting it onto our towbar-mounted bike rack was manageable, but I certainly wouldn't fancy hoisting it onto a roof rack without someone else to help.

Performance and ride quality

Power comes courtesy of Bosch's Performance Line CX motor, rated at up to 120Nm of torque in its current specification. That's significantly more than the 75Nm and 90Nm available from the FS 2 and FS 4 respectively, and a difference I was grateful for with three children in tow and some particularly steep gradients to tackle.

Our regular family excursion followed the river from Klosters to Garfiun, an 18km round trip involving approximately 300m of climbing. Even fully loaded with children, trailer and picnic supplies, the Moustache made wonderfully light work of the ascent.

The assistance feels remarkably natural, building smoothly as you pedal rather than arriving in an abrupt surge. I generally favoured the lower Eco or Tour settings, while my wife preferred a little more help, particularly on the steeper sections.

We only discovered the motor's limits once, after taking a wrong turn beneath the Gotschnabahn gondola towards the main ski area. Suddenly faced with a narrow trail exceeding 15 per cent gradient, it became difficult to maintain sufficient momentum to balance comfortably with the trailer attached. A little extra power would have been welcome, although this was an extreme scenario for any family e-bike.

Elsewhere, the Xroad felt impressively planted. The Schwalbe Smart Sam tyres provided ample traction on loose gravel, while the upgraded Magura brakes delivered reassuring stopping power on long Alpine descents.

Even on smooth tarmac the suspension made its presence felt, quietly absorbing unexpected drain covers and potholes. Unhitch the trailer and remove the child seat, however, and the bike transformed into something altogether more playful, encouraging a spirited blast along the gravel trails.

The Bosch Kiox 500 2.8” colour display was another highlight. Centrally mounted on the handlebars, it's considerably larger and easier to read than the smaller Purion 200 fitted to the lower-spec models, displaying speed, battery status and assistance level, along with useful prompts suggesting when to change gear.

There's additional functionality through Bosch's eBike Flow app, although I never felt the need to explore it. Everything I wanted was already available on the screen.

Battery life and range

The FS 6 is available with a 600Wh Bosch PowerTube battery or a larger 800Wh option, neatly integrated into the frame. Moustache quotes maximum ranges of 135km and 172km respectively under ideal conditions, although real-world results depend heavily on terrain, load and assistance level.

Our Swiss mountain riding provided a demanding test, with long climbs and a bicycle frequently carrying considerably more than a typical solo rider would.

Nevertheless, range was never a concern. A typical outing involved around 40 minutes climbing up the valley followed by a much quicker 20-minute descent, with shorter supermarket runs in between.

We generally charged the bike every other evening, plugging it directly into a socket in our garage without needing to remove the battery.

Rather than relying on the estimated remaining range, which inevitably fluctuated with the terrain, load and assistance level, I simply kept an eye on the battery percentage.

My one small criticism concerned the charging socket cover. Positioned facing upwards beside the motor housing, its flap was rather too easily dislodged, potentially exposing the connection to rain and dirt. It's a minor irritation on an otherwise thoughtfully designed bike, but one that could become troublesome over time.

Verdict

Having spent five weeks with the Moustache Xroad FS 6, I'm convinced it's about as versatile an electric bike as you could hope to own.

A dedicated cargo bike might make more sense for families whose main priority is transporting children, while those who rarely venture beyond tarmac could save money with a simpler Xroad.

But for anyone wanting one bike for everything from everyday errands to ambitious mountain adventures, with children and all their gear in tow, or simply the solo blasts along gravel trails, the FS 6 makes a very compelling case. It's expensive and on the heavy side, yet the freedom it offers makes those compromises surprisingly easy to overlook.

For us, it didn't just make getting around easier. It opened up more of the mountains to the whole family, creating shared experiences and memories that will stay with us long after the summer is over.