Flyer Uproc Evo:X: Bored up! New Bosch CX, more downhill power for the Swiss E-Enduro

The last Flyer Uproc Evo:X was already a sporty challenge to the dignified image of the Swiss e-bike pioneer. The E-Enduro convinced us in the test with its downhill strength and sporty character traits (Flyer Uproc Evo:X 8.70 in the test). Now Flyer is putting the successor on the chunky Onza tyres: In addition to the obvious update to the latest generation of the Bosch Performance Line CX, the engineers have also tweaked the suspension, geometry and overall design. The result: the e-bike has become even more powerful in many aspects! And it has also been given useful everyday features.

Visually, however, the successor is initially more straightforward. This is because Flyer has done away with the "slider solution" for battery removal, where the battery slips downwards out of the closed down tube. Instead, the new Powertube 800 is permanently installed in the down tube. This saves the chassis a few corners and edges - a point of discussion with the predecessor, as a look at the comment columns on social media shows. The lines are now much more classic.

However, the rest of the chassis is anything but average. The Flyer Uproc Evo:X has been upgraded with 180/170 millimetres of suspension travel. A centimetre has been added at the front and rear. And the geometry of the newcomer is even more extreme. In particular, the long reach of 465 mm (size S/M) to 540 mm (size XXL) stands out. With this, Flyer explicitly wants to appeal to particularly tall riders who have previously struggled to find a suitable bike.

The facts about the Flyer Uproc Evo:X

• Motor: Bosch Performance Line CX (Gen5, MY 2025)
• Battery: Bosch Powertube 800 (permanently installed)
• Optional: Range Extender Power More 250
• Suspension travel: 180/170 mm
• Wheel size: 29/27.5 inch
• Full carbon frame
• Two models 4.10 and 8.50 for 7399 and 8999 euros respectively
• Weight: from approx. 24 kilos (manufacturer's specification)
• Rear light integrated in rear triangle, Monkeylink adapter for front light

Motor and battery in the Flyer E-Enduro

A maximum of 85 Newton metres and 600 watts with an assistance level of 340 percent. The pure data of the new Bosch motor is identical to that of its predecessor. Why is the update still worthwhile? The new CX comes with a patented freewheel that eliminates clattering from the gearbox. The new motor is also significantly quieter than its predecessor when travelling uphill, and the software tuning has become even smoother.

The next important update: the new batteries. The Powertube 800, as fitted in the new Flyer, weighs a good 3900 grams, around 400 grams less than the old Powertube 750. So: less weight, more range! This was confirmed by our extensive range test. Flyer has permanently installed the large battery in the down tube. It can therefore not be removed for charging or changing. If you want to increase the range even further, you can click an additional 250 watt hours onto the down tube with the Power More 250.

>> Click here for the detailed test of the new Bosch Performance Line CX!

>> New E-MTBs 2025: The bikes with the new Bosch Performance Line CX motor

The geometry of the Flyer Uproc Evo:X

This is a big thing! Flyer has reorganised its sizing for the new Flyer Uproc Evo:X. The bike comes in four sizes from S/M to XXL. Whereby the smallest size corresponds more to a classic (to large) M. Small riders will be left out in the cold. The All Mountain Uproc:X is still also available in size S. What does that mean in figures? The reach ranges from 465 to 540 millimetres. This makes the bike one of the longest E-MTBs ever. Really tall riders around or over two metres should be delighted. And Flyer has also designed the extra-large frames precisely for them.

The steering angle is slack at 63.8 degrees, while the chainstay length is a moderate 445 millimetres. The stack, i.e. the relative height of the front, has been significantly increased compared to its predecessor. In size L it is 650 millimetres.

Models and prices

The new Flyer Uproc Evo:X is initially only available in two equipment variants, which should be available from dealers from January 2025. Similar to the Flyer Uproc:X, the top model 8.50 still has room for improvement. This applies to the Fox Performance suspension as well as the mid-range H1900 aluminium wheels from DT Swiss and the powerful XT brake system. The price for this is 8999 euros.

Let's start with the Flyer Uproc Evo:X 4.10 for 7399 euros. A tidy sum for an entry-level model! Here, too, it makes sense to take a look at the All Mountain in the Flyer range. Because the Uproc:X 2.10 is available for 5999 and was fully convincing in this setup in our large comparison test.