The new ebikes Flyer has unveiled so far for the 2025 season make for a remarkably long list. Just in time for Eurobike in the summer, these included the Flyer Upstreet TR:CF, the Flyer Goroc TR, the Flyer Gotour EL and the anniversary model Flyer G1 Gotour. The Flyer Gotour 2025 and the Flyer Goroc X 2025 were added recently. From trekking ebikes to a crossover ebike, ebikes for commuting in the city to touring ebikes, everything was there. The only thing missing was an e-mountainbike. Today, the manufacturer is rectifying this flaw and presenting the second generation of the Flyer Uproc Evo:X featuring a Bosch Performance Line CX motor.
The Flyer nerds among you will know – the Flyer Uproc Evo:X has been leading the manufacturer’s e-MTB range in terms of suspension travel for several years. Typical for an e-enduro bike, it offers significantly more than 150 millimetres at both the front and rear. This has not changed in the model for the 2025 season. But before we go into these values in detail, let’s take a look at the centrepiece of the e-mountainbike: its frame.
Controlled attack
It is still made from carbon fibre. This means you benefit from a fairly light frame with a very high level of stiffness. But that’s almost all the similarities with its predecessor. Flyer has done a lot of work on the geometry. For example, it is noticeable that the distance between the ground and the centre of the bottom bracket has shrunk by seven millimetres. At the same time, the vertical distance between the bottom bracket and the imaginary line between the front and rear wheel axle has increased. This results in a position in which you sit more ‘in’ the bike. The positive aspect of this is that it gives you more control when riding. But be careful. On the other hand, the pedals also touch down more quickly when leaning.
With a difference of 0.2 degrees, the head angle is only just a wee bit flatter than before. In practice, however, the slightly steeper seat angle should be more noticeable. Across all four frame sizes S/M, L, XL and XXL, it is on average around one degree steeper. The reason for this is probably an attempt to further increase pedalling efficiency and make it easier for you to ride uphill. The wheelbase has also increased – by several centimetres in each case. As a result, the Flyer Uproc Evo:X 2025 gains stability at high speeds and is very track-adherent. Conversely, however, it loses a little of its manoeuvrability.
Rear triangle with a different concept
In terms of the rear triangle, Flyer has retained the design with four pivot points. However, the shock now docks close to the bottom bracket. On the 2024 model, it ran underneath the top tube. This decision opens the way to a straight seat tube. This in turn offers more space for longer dropper seat posts, allowing you to lower the saddle further if required. An important plus point, especially on an e-enduro bike.
We don’t know whether this is because the frame no longer provides a flip chip. In any case, the option to change the frame geometry slightly and orientate it more towards the downhill or the way up to the summit is no longer available. However, the sadness about this is limited, at least for us. After all, Flyer has upped the suspension travel. The 170 millimetres on the fork become 180 millimetres. For the shock, the value increases from 165 millimetres to 170 millimetres.
Flagship Bosch drive unit
Inside the frame is the latest version of the Bosch Performance Liebe CX motor. Quieter and lighter than ever before, it scores points on the Flyer Uproc Evo:X 2025 above all with its Hill Start Assist and Extended Boost. After all, you don’t ride downhill all the time, even with an e-enduro bike like this. Flyer has integrated the new large Bosch PowerTube with its 800 watt hours of capacity in the down tube. If you want even more, you can get a Bosch PowerMore 250. Depending on the conditions, this will ideally provide you with motor support for a further 50 kilometres. However, you can only track this using the Bosch eBike Flow app. There is no dedicated display on the bike. You can access the ebike system via the Bosch System Controller control unit integrated in the top tube together with the Bosch Mini Remote on the handlebars.
Display – yes or no?
If you prefer to keep a permanent eye on some of your riding data from the handlebars, you could retrofit a display from the Bosch Smart System. With the new Purion 400, there is a variant that fits in quite well with the simple operating concept of the Uproc Evo:X 2025 due to its small screen diagonal of 1.6 inches. If you shy away from the installation, you can simply opt for the wireless Bosch Intuvia 100. Its range of functions is limited. However, you can fit it within five minutes.
Instead of a display, you could theoretically also use your smartphone. The MonkeyLink 2.0 interface installed on the handlebars is compatible with the SP Connect system. It is factory-fitted so that its mount points directly in the direction of travel so that a suitable headlight can be attached directly to it. However, you can also turn the interface horizontally and place a smartphone on it. Provided you put it in a suitable case, of course.
Forward-facing lighting is therefore provided. The tail light is installed as standard at the transition from the chainstay to the seatstay.
A tricky decision: Old or new?
Flyer is launching two versions of the second generation of the Uproc Evo:X with the Bosch Performance Line CX. As the first generation of the ebike is also still available, there will once again be a coexistence of old and new, as with the Flyer Goroc X. This raises the exciting question of which one to choose? The new Flyer Uproc Evo:X 8.50 for the 2025 season matches the Flyer Uproc Evo:X 8.70 from the previous year. Both cost 8,999 euros. Some details such as the suspension system with suspension fork and shock as well as the brakes are identical. We talked about the differences in terms of frame geometry and rear triangle in the course of this article. In terms of shifting comfort, the Flyer Uproc Evo:X 8.50 with its electronic shifting from Sram has the edge over the Flyer Uproc Evo:X 8.70.
From our point of view, there is a lot in favour of the 2025 models. The better motor and the larger battery are two aspects that you will benefit from on every ride. What’s more, the newcomers each weigh around two kilograms less than their predecessors. This definitely pays off as a small plus in terms of range. How heavy things like the new tail light or the omission of the flip chip weigh depends on your personal requirements for such a bike.
In the end, the price could be the deciding factor. For example, the Flyer Uproc Evo:X 4.10 for 2025 is exactly the same at 7,399 euros as the Flyer Uproc Evo:X 4.10 from 2024. Perhaps the manufacturer will soon respond to this stalemate situation with a discount for the previous year’s model.
Flyer Uproc Evo:X for the 2025 season at a glance
- Variants: Flyer Uproc Evo:X 8.50, Flyer Uproc Evo:X 4.10
- Frame: Carbon
- Suspension fork: Fox 38 Float Performance E-Optimised, RockShox Domain R
- Motor: Bosch Smart System Performance Line CX
- Battery: Bosch PowerTube 800
- Control unit: Bosch System Controller + Bosch Mini Remote
- Drivetrain: Sram GX Eagle Transmission, Shimano Deore
- Brakes: Shimano XT BR-M8120, Shimano BR-MT520
- Weight: approx. 24 kg
- Maximum permitted system weight: 140 kg
- Colour: Pearl Black Gloss
- Price: from 7,399 euros
