Rotwild have introduced their new Aggressive Series e-MTBs that intentionally sacrifice range for more nimble, natural feeling enduro and all-mountain bikes. This makes a notable change from the big mountain RX.750 model Rotwild are best known for, swapping that 750Wh battery for a much smaller 375Wh battery. Shimano EP8 motors drive both; let’s take a closer look.

Rotwild Aggressive Series

2021 rotwild e-mtb enduro all-mountain 29er

The all-new 29″ full suspension e-MTBs from Rotwild run full carbon frames with a carbon linkage. Appropriately named, their geometry can certainly be described as aggressive with slack head angles, steep seat tube angles and generous reach figures.

This time, it’s not all about how far you can go with the assistance of a motor. It’s more about how a little assistance can be integrated into a bike that still rides like a mountain bike. The Orbea Rise is a recent good example of a bike with similar intentions. Weight was considered carefully for the new frames, shaving up to 4 kg off the big mountain R.X750.

2021 Rotwild R.E375

new lightweight emtb rotwild r.e375 enduro ebike 160mm rear wheel travel

This is Rotwild’s all-new enduro e-MTB. With a 170mm fork sat at a head angle of 63.5°, there’s no doubt about what this bike is intended for; aggressive trail riding. It gets 160mm of rear wheel travel. The suspension platform is progressive offering a 14% progressive load deflection curve at the limit of travel in comparison with the Rotwild R.E750.

2021 rotwild emtb enduro bike 170mm fork shimano ep8 drive unit

We note that the seat tubes on the Rotwild R.E375 are fairly long, starting at 440mm in medium. Reach is generous at 460mm, stretching up to 510mm in XL. A frame size-consistent chainstay length of 440mm, coupled with boost rear hub spacing leaves sufficient clearance for 2.4″ tires.

rotwild r.e375 enduro e-mtb 375wh battery quick release

The Rotwild R.E375 gets a modern 21700 cell type (20 units) at 5000 mAh weighing a claimed 1.9 kg

A 375Wh battery integrates seamlessly into the downtube, with a neat button-mediated quick release system for easy removal and installation. It powers a Shimano EP8 drive unit offering its full 85 Nm torque with up to 400% assistance. 

rotwild e-mtb clean cockpit wire free integration

Adjustments to power output in the Eco, Trail and Boost modes can be made in the E-TUBE app

The Rotwild R.E375 features their new proprietary cockpit. Specially designed for the Aggressive series, it gets a weight-optimised steering and stem unit with wires invisibly
installed around the user interface and MonkeyLink upgrade option.

rotwild e-mtb chainstay protector molded rubber quietens the ride

New undulating chain stay protection keeps noise levels down when going downhill

The 2021 Rotwild R.E375 is available at Pro and Core price points, starting from €7,499.00 for the entry-level Core. That money gets you a FOX 36 Performance E-Tuned fork, a FOX DPX2 Performance shock, Magura MT5 4-piston brakes, DT SWISS H1900 SPLINE wheel set and Shimano XT 12 speed drivetrain.

Geometry

Fork Travel [mm] 170
Fork Offset [mm] 44
Fork Axle Standard [mm] 15×110
Shock Size [mm x mm] 230×60
Rear Wheel Travel [mm] 160
Max Tire Size [inch (mm)] 29×2.4 (755×62)
[inch (mm)] 29×2.4 (755×62)
     
Frame Size   M L XL
Seat Tube length [mm] 440 470 506
Top Tube length (incl. 25 mm Offset / Setback) [mm] 604 632 655
Head Tube Length [mm] 110 125 130
Chainstay Length [mm] 445
Bottom Bracket Height [mm] 350
BB Drop [mm] 25
Head Tube Angle [ ° ] 63.5
Seat Tube Angle [ ° ] 77
Reach [mm] 460 485 510
Stack [mm] 625 636 641
Wheelbase [mm] 1253 1284 1311
Standover [mm] 730

2021 Rotwild R.X375

2021 rotwild all-mountain ebike r.x375 lightweight build

The Rotwild R.X375 all-mountain e-MTB Pro build comes in at €8,499.00

This is the all-new all-mountain e-bike from Rotwild. Running a 29″ wheelset, the R.X375 gets a 150mm travel fork paired with a 140mm rear end. And, it’s the only one available in small, with a a S-XL size range. 

shimano ep8 motor offers 85 nm torque

The Rotwild R.X375 shares a lot of similarities with the burlier R.E375; the 375Wh quick release battery that can be charged both on and off the bike; the Aggressive Series integrated cockpit setup, the high modulus carbon frame and rocker, for example. 

However, this shorter travel e-MTB differs significantly in geometry to its enduro sibling. A steeper 66.5° head tube angle is paired with a slacker 75.5° seat tube angle. Seat tubes are equivalent, starting at 410mm in small. This bike will likely feel more compact due to slightly shorter reach figures spanning a 430mm to 500mm range.

all-new carbon fiber all mountain ebike rotwild r.x375 140mm travel geometry

That shorter reach may be accounted for a little by the more pronounced 30mm BB drop. Chainstays are a little longer, measuring up at 450mm across the size range. It will accommodate a maximum tire width of 2.4″. 

The 2021 Rotwild R.X375 all-mountain e-MTB is available at Ultra, Pro and Core price points. The entry-level Core model will set you back €6,999.00, built up with a FOX 36 Performance E-Tuned fork, a FOX DPX2 Performance shock, Shimano XT drivetrain and Magura MT5 4-piston brakes.

Geometry

Fork Travel [mm] 150
Fork Offset [mm] 44
Fork Axle Standard [mm] 15×110
Shock Size [mm x mm] 210×50
Rear Wheel Travel [mm] 140
Max Tire Size [inch (mm)] 29×2.4 (755×62)
[inch (mm)] 29×2.4 (755×62)
           
Frame Size   S M L XL
Seat Tube length [mm] 410 440 470 506
Top Tube length (incl. 25 mm Offset / Setback) [mm] 590 610 640 667
Head Tube Length [mm] 110 110 130 140
Chainstay Length [mm] 450
Bottom Bracket Height [mm] 345
BB Drop [mm] 30
Head Tube Angle [ ° ] 66.5
Seat Tube Angle [ ° ] 75.5
Reach [mm] 430 450 475 500
Stack [mm] 618 620 636 645
Wheelbase [mm] 1184 1205 1237 1266
Standover [mm] 730

 

Rotwild.com

3 comments

  1. nooner on

    Rotwild always produces a nice looking bike and this one is no exception. However, a 375Wh battery is tiny, about 25% less capacity than the 504Wh Shimano i have. ( and wish it was Larger…)

    Reply
  2. Mikey on

    So they shaved off “up to 4 kg” compared to something else. That tells us nothing about how much these bikes actually weigh. No info on the Rotwild website either. Bikes do look really good though.

    Reply

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