FLYER Uproc4 4.10 Review

The FLYER Uproc4 4.10 represents the Swiss ebike manufacturer’s entry into the full-suspension market. Is it also the door to unbridled off-road fun? We found out in this group test.

For an overview of the test fleet head to the group test: The best eMTB around € 4,500 – 11 exciting and affordable bikes go head to head

FLYER Uproc4 4.10 Review — **FLYER** Uproc4 4.10 | 24.92 kg | € 4,399

The FLYER Uproc4 4.10 has a unique selling point: its motor. FLYER is currently the only eMTB manufacturer to use Panasonic motors, offering either an integrated two-speed transmission or, as in the case of the Uproc4 4.10, the 1.3 kg-lighter version without an integrated transmission. The motor puts out a maximum of 250 W, 68 Nm torque, and is powered either by a 430-Wh or (for an additional € 400) a 630-Wh battery.

The basis (the frame) is good – with some upgrades to the spec you can get a lot more out of the Flyer.

FLYER will also exchange the Uproc4 4.10’s standard rigid seatpost with a dropper post for € 200 – an upgrade that makes perfect sense! The remaining componentry of the Uproc4 4.10 is entry-level but functional. However, the Schwalbe Performance tyres performed poorly in off-road use, where we found them lacking grip. The MAGURA MT Trail brakes score with their good modulation, but we would also have liked a large four-piston brake caliper on the rear wheel for a little more reliability.

The FLYER Uproc4 4.10 in detail

Fork Manitou Mattoc Comp 140 mm
Rear shock RockShox Monarch RT 140 mm
Motor/Battery Panasonic 630 Wh
Drivetrain Shimano Deore XT/SLX
Brakes Magura MT Trail Sport 200/180 mm
Seatpost Kind Shock EI30 125 mm^*
Stem Flyer Ahead 50 mm
Handlebar Answer Pro Tape 780 mm
Wheels Sunringlé Düroc 40
Tires Schwalbe Rocket Ron Perf. 2.8″

The FLYER Uproc4 4.10 represents the Swiss ebike manufacturer's entry into the full-suspension market. — **Excellent**
The Manitou Mattoc suspension fork convinces with its defined feedback, sensitive response, and lots of comfort

**Clattering**
The cables are not clamped in the frame and rattle loudly when the trail starts getting bumpy. Annoying!

**High-quality**
The illuminated remote lever is comfortable to operate, but is bound to get damaged in a crash

**Upgrade**
The Uproc4 4.10 comes with a 430 Wh battery as standard. When buying, you should therefore take into account the additional € 400 for the 630 Wh model.

The geometry of the FLYER Uproc4 4.10

**Helmet** Endura MT500 | **Shirt** Fox Indicator Jersey | **Shorts** Mavic Crossride | **Backpack** XLC E-Bike-Backpack BA-S82

As modern as the bike looks with its azure-yellow paint finish, its geometry lives up to that promise. The riding position is slightly stretched but very comfortable. Even at a low cadence, the Panasonic motor assists powerfully and delivers good propulsion. However, when you stop pedalling, it carries on going a little longer than other motors. The display and the remote lever make a high-quality impression and are easy to operate, but they are very exposed on the handlebars and bound to get damaged in a crash. Downhill, the FLYER Uproc4 4.10 convinces with a high degree of agility, which is the result not only of its dialled, balanced geometry, but also of its suspension. It responds sensitively and only uses as much travel as is really needed – the rider always gets enough feedback from the ground to ride with a lot of precision. The bike responds very directly when steering. As the rocks and roots get bigger, however, the low profile tyres with their hard rubber compound and the loudly clattering cables start to distract from the fun you might otherwise have. It’s a shame, as the geometry and the suspension is actually capable of a lot more.

Conclusion

The basis of the FLYER Uproc4 4.10 is good. The frame scores with very balanced geometry and a good rear linkage. Riders who ride mainly on gravel roads will get along well with the bike. In rougher terrain, however, the components limit the potential of the bike.