First ride: Thömus Lightrider E_MAX 2026

With the new Lightrider E_MAX, Thömus are blurring the lines between traditional mountain bikes and eMTBs. The clean, minimalist look of a light-support bike is paired with the full power and natural ride feel of the brand-new maxon BIKEDRIVE AIR S motor. The aim? Seamless integration and minimal weight. But does the concept work as a trail and cross-country machine?

The Thömus Lightrider E_MAX combines a sleek, minimalist aesthetic with serious performance. The model variant we tested tips the scales at just 17.01 kg, and if you go for the Cross-Country version, you can shave off a few more hundred grams.

At the heart of the bike is the brand-new maxon BIKEDRIVE AIR S system, which marks a real breakthrough in the eMTB world. It delivers full support power while the motor itself weighs just 2 kilograms. Paired with a 400 Wh battery, a punchy 90 Nm of torque and peak output of 620 watts, the Lightrider E_MAX offers the kind of performance you’d normally only get from significantly heavier bikes – all wrapped in a clean, stripped-back design.

Thömus offer a comprehensive configurator so you can tailor the E_MAX to your personal preferences, but they also provide three baseline builds to suit different types of riders. The XC-Light version generates 120 mm of travel front and rear and is aimed at sporty cross-country riders who put a premium on light weight and efficiency. If you’re after more confidence on technical trails, the TRAIL-Light version we tested strikes an ideal balance. With 140 mm up front and 130 mm at the rear, it offers a great mix of low weight and capable descending performance. And for those looking for maximum control and stability in rough terrain, there’s the TRAIL model. It keeps the same suspension travel but ups the game with a burlier fork and more robust tyres, making it perfect for riders who want to push the bike to its limits on the trail. Prices for the Thömus Lightrider E_MAX start at CHF 5,990 for the BASE model.

New Thömus Lightrider E_MAX in Detail – all Strengths and Weaknesses at a Glance

The Thömus E_MAX stands out right away with a number of high-quality features. One of the highlights is the aluminium motor remote lever, which offers excellent tactile feedback and a precise, solid feel. Even in rough conditions, it’s easy to operate intuitively – something very few systems can match at the moment. Paired with the dropper remote, the cockpit feels cohesive and strikes a great balance between functionality and ergonomics.

The compact aluminium chain guide is equally impressive. It feels solid and well-made, and visually it blends in perfectly with the overall design. The bike also features a bright, premium tail light that can be conveniently switched on and off using the power button on the display – another thoughtful detail that rounds off the positive impression. The frame meets category 4 standards and is rated for a maximum system weight of 140 kilograms, which makes the bike suitable for demanding trails. Another welcome feature: when ordering, customers can choose whether the cables are routed externally in the traditional way or internally through the headset. The protectors on the downtube, chainstay and seatstay are made from a soft material that noticeably reduces noise compared to hard plastic alternatives.

One standout feature is the space for a bottle cage: there’s plenty of room on the downtube, even on a size M frame, so you can easily fit a large water bottle. Alternatively, the mount can be used to carry the 250 Wh range extender. There’s also a now-standard tool mount on the underside of the top tube, ideal for a multitool or CO₂ cartridges.

Despite the many well-executed details, there’s still room for improvement ina few areas. The chainstay and seatstay protectors offer good coverage, but on our test bike, parts of them started to peel off. The charging port cover is a bit fiddly to close, and over the course of the test, a crack appeared. The downtube protector doesn’t fit quite flush either, and the flap cover between the main frame and chainstay can come loose when cleaning the bike with a pressure washer. A countersunk bolt with a washer would likely be a more durable solution here.

The mount for the magnet sensor also leaves a less-than-premium impression, as the thin plastic flexes easily. In terms of functionally, however, it works flawlessly, and we experienced no issues with the sensor throughout the entire test period. The SAG indicator on the rear end isn’t convincing either: it’s too small, barely visible from the saddle, and overall too imprecise to be truly useful in everyday riding. Additionally, the segment display looks rather outdated and is attached with cross-head screws – a definite no-go on a bike of this calibre. A full-graphic display would offer a much more premium touch, and according to Thömus, it’s coming soon.

The maxon BIKEDRIVE AIR S motor system of the Thömus Lightrider E_MAX

At the heart of the bike is a maxon BIKEDRIVE AIR S motor system, which sets a new benchmark. The motor delivers 620 watts of peak power and 90 Nm of torque, yet weighs just 2 kilograms – an exceptional combination for an eMTB in this class. For comparison’s sake, the only light-support motor currently lighter is the TQ-HPR60, but it doesn’t come close in terms of power output. On paper, the maxon system offers up to 400% assistance, putting it on par with most current full-power systems. Power is supplied by a 400 Wh battery weighing 1.8 kilograms. An optional 250 Wh range extender (1.6 kg) is also available. There are two charging options: a compact 2A charger for use on the go, and a 6A charger that bumps up to 80% in around three hours. That’s not record-breaking for this category, but still within an acceptable range.

Thömus have integrated the motor mount into the frame design so cleanly that it’s barely noticeable – a visually seamless solution. On the drive side, the lower motor mount is covered by the motor guard but remains accessible. However, if you plan to work on it yourself, be warned: removing the motor is more complicated than it might seem at first glance. In the extended suspension position, the upper mounts are hidden behind the chainstays on both sides. To remove the motor, you’ll also have to take out the shock, which requires compressing the swingarm – a task made trickier by the flex stays. The chainring also partially covers the motor mounts, though depending on its position, access is possible. One area of concern is the lower bolt on the drive side, which uses just a 3 mm hex bolt. That’s not exactly confidence-inspiring for such a critical component.

The digital features are still fairly modest at this stage, but they provide a solid foundation. All the essential basic functions are there: the BIKEDRIVE Connect app displays battery status, lets you control the lights, and allows you to select the support level – just to name a few examples. A big plus: connecting the app to the bike during our test was effortless and the connection remained stable throughout, ensuring a hassle-free experience. While the app already includes a menu suggesting future motor customisation options, this feature wasn’t available in the version we tested.

The Spec of the new Thömus Lightrider E_MAX

The TRAIL-Light version we tested is a custom-built, and features top-tier components. Instead of the standard SRAM XX Transmission drivetrain, our bike came equipped with a Shimano XTR groupset. The drivetrain ensures quick, precise shifting and includes Shimano’s best shifter to date in terms of ergonomics, tactile feedback and overall performance. Unfortunately, the maxon system currently doesn’t support Shimano’s Free Shift function, which automatically selects the optimal gear even when you’re not pedalling. In real-world use, that’s proven to be a very handy feature. A small drawback: the latest generation of Shimano drivetrains can’t quite match their American rivals when it comes to ultra-smooth shifting and noise levels. When the suspension compresses deeply, the system gets noticeably louder, slightly detracting from an otherwise excellent impression.

There are no compromises when it comes to braking performance. Up front, a Shimano XTR four-piston brake is paired with a 200 mm rotor, while the rear calliper is combined with a smaller 180 mm disc. Braking power is outstanding and suits the bike’s category perfectly – no fading, great modulation. However, the front brake hose sits a little too close to the handlebar, which can cause scratches and some noise on rough terrain.

For the suspension, Thömus rely on premium FOX components that suit the bike’s character perfectly. Up front, a FOX 36 SL Factory delivers a firm yet supportive ride. Thanks to the GRIP X damper, it offers full adjustability for high- and low-speed compression, plus a simple rebound setting – and it’s around 200 grams lighter than the standard FOX 36 Factory. At the rear, the FOX FLOAT X is fitted, which is especially easy to set up. With tuning options for low-speed compression and rebound, it offers plenty of adjustability for different riding styles. The shock can also be locked out when needed.

The EightPins H01 dropper post stands out with its unique design: instead of using a traditional seat clamp, it’s bolted directly to the bottom of the seat tube. This allows it to integrate cleanly into the frame and makes it easy to slide in with minimal force. The result is smooth operation and precise modulation. A key factor here is the extended bushing overlap, which virtually eliminates the risk of sticking.

A handy feature is the quick adjustment of maximum drop via a small lever on the seatpost head. With a rider height of 176 cm and an inseam of 82 cm, we achieved a drop of 170 mm – decent, though fairly average for a size M frame. However, the design does come with some drawbacks. The tall stack height, combined with the long seat tube, noticeably limits freedom of movement – especially when jumping. There’s also a slight side-to-side play in the post, which can be distracting on climbs, although you do get used to it over time.

For this version, Thömus picked a DT Swiss EXC 1200 wheelset – a top-tier carbon enduro model that can be upgraded with the DF system (anti-pedal kickback), although that’s not necessarily essential for a bike in this category. The wheels are rated for ASTM category 5 use and approved for a system weight of up to 130 kg, which speaks volumes for their durability.

The wheels are combined with Schwalbe Wicked Will tires in the Super Race casing and ADDIX Soft compound. This setup aims to strike a balance between low rolling resistance and reliable grip. However, in wet conditions, the tires quickly reach their limits.

Race Face supply the cockpit, which consists exclusively of high-end components. The 50 mm, CNC-machined Turbine SL stem looks refined and premium, and is paired with Race Face Era handlebars. These are designed to reduce arm fatigue and improve comfort on long rides. Unfortunately, the otherwise solid overall impression is dampened by the narrow Thömus VLG 884 tec grips, which feel quite firm and provide little cushioning. If you’re putting together your own build, choosing ESI grips would be the smarter option.

Tuning tips:
– Grips with better damping
– A more aggressive front tire

Individuality is a top priority at Thömus

The Thömus Lightrider E_MAX can be configured to your exact preferences using the online configurator. Alongside three base colours, there are over 20 custom colours to choose from, each available in either a matte or glossy finish, making every bike a true one-off. Most major components – such as suspension, wheels, brakes, drivetrain and other details – can also be individually selected from a limited range of options.

The BASE version retails from 5,999 Swiss francs. At the top end of the standard builds is the TRAIL-Light version, priced at 12,700 francs. While the configurator allows the price to climb even higher, this variant already comes superbly equipped and essentially offers the very best.

The geometry of the new Thömus Lightrider E_MAX

The bike’s sporty riding position is largely shaped by the combination of a low front end and a well-chosen seat angle, allowing for efficient power transfer through the pedals. With a reach of 454 mm in size M, the fit feels pleasantly moderate – not too stretched, keeping the bike agile and playful, especially when paired with the short 437 mm chainstays, which remain consistent across all sizes. The head angle is also well-suited to this category. While relatively slack, it doesn’t make the bike feel sluggish; instead, it remains responsive and easy to control.

One thing that stands out is the relatively high bottom bracket in relation to travel. This gives the bike a slightly tall stance on descents, which can make it feel a bit awkward and leaves some potential untapped. On the other hand, if your riding style is more measured or you’re focused on technical climbs, you’ll appreciate the added ground clearance.

Sizing follows a standard approach. Four frame sizes with reach increments of 25 to 30 mm cover the typical range. With reach values 430 mm, the smallest size makes this bike a great option for very small riders too. Less ideal, however, is the seat tube length. At 458 mm in size M, it’s already comparable to what some brands offer in size XXL. Combined with the relatively tall stack height of the dropper post, this can cause clearance issues when jumping, with the saddle getting in the way.

Size	S	M	L	XL
Seat Tube	416 mm	458 mm	488 mm	524 mm
Top Tube	564 mm	594 mm	623 mm	656 mm
Head Tube	90 mm	110 mm	125 mm	140 mm
Head Angle	65.4°	65.4°	65.4°	65.4°
Seat Angle	73.2°	73.6°	73.9°	74.1°
Chainstay	437 mm	437 mm	437 mm	437 mm
BB Drop	31 mm	31 mm	31 mm	31 mm
Wheelbase	1169 mm	1207 mm	1238 mm	1274 mm
Reach	424 mm	454 mm	479 mm	509 mm
Stack	600 mm	619 mm	632 mm	646 mm

The new Thömus Lightrider E_MAX on the trail

Right from the first ride, it’s clear how easy the suspension is to set up. The FOX fork impresses with excellent support. The full travel is used without harsh bottom-outs, and both the low- and high-speed compression were set to a medium position for a rider weight of 75 kg. This leaves plenty of adjustment range for both lighter and heavier riders. The shock is equally impressive: with 30% SAG and a fairly open compression setting, it works in perfect harmony with the fork. The travel is fully utilised without the suspension blowing through its stroke, and the overall setup delivers a firm yet controlled ride feel – both on technical trails and fast descents.

Riding downhill, the bike doesn’t fully show its potential. It takes an experienced rider to handle challenging terrain with confidence. The high bottom bracket gives the bike a slightly awkward stance, making weight distribution more demanding. The low front end requires a very active riding style to stay in control on steep sections and affects the overall sense of security. Too much pressure on the front wheel, combined with the tyre choice, can quickly lead to the front washing out. It becomes clear that the tyres are limiting the bike’s potential. With more aggressive, grippier tires, the Lightrider could unlock significantly greater downhill performance. Even so, the ride feel was a pleasant surprise: the Thömus Lightrider E_MAX doesn’t behave like a typical eMTB, but rather like a nimble enduro bike. It carries speed effortlessly, and the fast-rolling tyres amplify the bike’s sense of pace on flowy trails.

And that same efficient character continues on the climbs, which is where the bike really plays to its strengths. The steep seat angle and low front end put plenty of pressure on the pedals, creating a highly efficient climbing position. Long ascents are easy to manage without feeling like the bike is working against you – and that applies even without full motor support. In fact, the lower assistance modes perform exceptionally well, which isn’t always the case with other systems. While the motor’s performance figures aren’t the highest on the market, the bike still gives the impression of flying uphill – not quite at Avinox level, but noticeably quicker than most full-support systems. On technical uphill trails, the climbing performance is excellent. The motor is highly responsive and easy to modulate, making precise line choices much easier. That said, tyre choice once again limits performance. With more grip, the Lightrider’s uphill potential could be pushed even further.

When it comes to noise levels, the motor is nothing short of a sensation: extremely quiet, and while audible under full load, it’s far less high-pitched than most of its competitors. In terms of sound, it currently tops our list among full-power motors. The ride feel fits seamlessly into this positive picture. The transition past the 25 km/h threshold is buttery smooth, with support fading in and out gently. No sudden surges, no twitchy behaviour – everything feels pleasantly natural. Even without assistance, the bike pedals surprisingly well – almost like a traditional, non-motorised bike. The only minor quirk is a slight twitch in the pedals when stationary, especially noticeable when braking hard to a stop, like at a traffic light. This is somewhat reminiscent of a Bosch motor, though it’s far less pronounced and hardly bothersome.

The motor also shows a controlled character when setting off. Unlike some systems that surge forward immediately, this one requires a touch more pressure on the pedals. What might seem like a drawback at first actually proves to be an advantage on the trail: the bike pulls away smoothly and predictably, without any sudden bursts of power.

Despite the relatively small battery, the bike delivers solid real-world performance. Our lab tests confirm what we experienced on the trail (75 kg rider weight including gear):

• Full Power: 810 vertical metres / 32 km at 15 °C
• Mid Power: 980 vertical metres / 41 km at 8 °C
• Low Power: 1,150 vertical metres / 50 km at 11 °C

Who should take a closer look at the new Thömus Lightrider E_MAX?– and who should look elsewhere?

This bike is aimed at riders who prefer minimal assistance but still want the option to unleash full power when needed. It appeals to tourers who value efficiency but like the freedom to dive into a trail at any moment. With grippier tires and a slightly higher cockpit setup, the bike’s trail performance can be significantly boosted, making it a great choice for those who prioritise trail riding. At the same time, it’s ideal for riders who appreciate the look and feel of a classic mountain bike but don’t want to give up the benefits of a full-power motor system. This makes the E_MAX especially appealing to those who want a one-bike solution – a bike that feels natural both uphill and down, and can, when desired, ride almost like a regular analogue bike. And thanks to the neatly integrated rear light, it even works brilliantly as a commuter.

Conclusions about the new Thömus Lightrider E_MAX

The Thömus Lightrider E_MAX pulls off an impressive balancing act between a minimalist look and true full-power performance. The new maxon BIKEDRIVE AIR S motor stands out with strong, natural-feeling support, an incredibly quiet ride and an exceptionally low weight for this power level. The bike shows its greatest strengths on the climbs: it climbs efficiently and performs well in all assistance modes. On descents, it remains fast and lively, but due to the high bottom bracket, low front end and tyre choice, it demands an active and experienced rider. Aside from a few minor details, Thömus deliver a top-tier eMTB that, thanks to its customisability, has the potential to offer even more downhill performance than our test bike did. If you’re looking for a light, quiet and naturally riding full-power eMTB, the E_MAX is one of the most exciting options currently available.

For more info, visit the official Thömus website.

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Words: Reynaldo Ilagan Photos: Lars Engmann