Shimano boosts ebike power with brand-new DU-EP800 motor

Shimano’s brand-new electrical bike DU-EP800 motor system boosts torque to 85Nm from the older E8000’s 75Nm torque motor, whereas sustaining the identical battery vary in Path mode and rising it in Eco mode.

The brand new motor is lighter than the previous one, too.

It weighs a claimed 2.6kg, which is a 300g saving on the earlier motor, because of its all-new magnesium casing. Shimano’s managed to cut back the amount and subsequently the width of the brand new motor by 10 per cent, too.

5 issues it is advisable to find out about Shimano’s new DU-EP800 motor

  1. Boosted to 85Nm torque
  2. Discount in weight to a claimed 2.6kg
  3. Narrower 177mm Q-factor
  4. Claimed 36 per cent lower in pedalling drag
  5. Identical vary because the previous mannequin in Path mode, enhance in vary in Eco mode

Shimano has additionally tweaked the EP8’s software program to provide a “extra pure feeling e-mountain bike”. It’s performed this by adjusting how the three assist modes work and providing user-customisability of these modes through itsE-Tube Trip and E-Tube Undertaking apps.

Shimano DU-EP800 electrical bike motor particulars

Extra torque, much less weight

Shimano EP8 electric mountain bike motor and groupset

The DU-EP800 motor is smaller and lighter than the E8000.

On the centre of Shimano’s new DU-EP800 motor is a rise in most torque from 75Nm for the E8000 system to 85Nm, now rivalling Bosch’s recently updated Performance Line CX motor’s output.

Concurrently rising torque, Shimano’s managed to cut back claimed weight to 2.6kg from 2.9kg for the previous E8000 system. This 10 per cent discount is because of a magnesium drive unit casing and Hollowtech crank spindle, which additionally claims to spice up stiffness.

Shimano claims this provides it a “best-in-class” energy to weight ratio.

Decreased friction, larger vary

Shimano EP8 electric mountain bike motor and groupset

The EP8’s internals have been redesigned to cut back weight, enhance vary and reduce drag.

Battery effectivity, and subsequently vary, has been improved, too. Shimano’s performed this by reducing pedalling drag from contained in the motor by 36 per cent in comparison with the E8000 system.

Pedal drag is most noticeable when the motor system is turned off – some folks have likened pedalling an electrical bike with out help to using by glue. These sensations needs to be diminished with the EP8 system.

The reductions have been achieved by altering the motor’s seals, altering its three-stage gear design and utilizing a brand new one-way clutch, which additionally provides the motor faster engagement when the rider begins pedalling and smoother disengagement as soon as the rider stops.

Its vary has elevated by 20 per cent in Eco mode in comparison with the E8000 unit and, regardless that torque has elevated general, battery vary in Path mode stays the identical.

Higher thermal administration, decrease quantity

Shimano EP8 electric mountain bike motor and groupset

The fins have been modified to enhance cooling.

The brand new magnesium drive unit’s physique has higher warmth administration and improved cooling fins in comparison with the earlier system. New EW-SD300 wires additionally contribute to higher warmth management because of their smaller dimension. They’ll additionally transmit extra information, opening up the potential to develop Di2 and different accent compatibility and performance.

Improved warmth administration means the motor can function at most torque for longer with out reductions in efficiency or different reliability points.

Shimano has additionally managed to cut back its decibel output, claiming it makes the identical quantity of noise because the E7000 unit.

Not solely has its audible quantity been diminished, however its dimension has been minimize by 10 per cent over the E8000. This, Shimano claims, improves floor clearance, makes the motor look sleeker and leads to a narrower 177mm Q-factor.

Shimano EP8 electric mountain bike motor and groupset

The Q-factor is now 177mm.

Regardless of its discount in dimension, it makes use of the identical body mounting sample because the E8000 and E7000 items, which implies bike manufactures can spec any three of these motors on their frames.

It additionally opens up the opportunity of retrospective upgrades to present E8000 and E7000 house owners, nevertheless Shimano’s press launch doesn’t point out whether or not that is or isn’t doable.

Upgraded equipment

The brand new DU-EP800 may have its personal XT-level FC-M8150 crank arms that don’t require any axle spacers and can be found in 160mm, 165mm, 170mm and 175mm lengths.

A extra primary FC-EM600 crank – that appears suspiciously just like Shimano’s new Deore M6100 crankset – can be obtainable with the identical size choices because the XT model.

A brand new DU-EP800-specific CD-EM800 chain system is on the market and encompasses a mud-shedding design. Due to adjustability, it’s appropriate with 56.5mm and 53mm chain traces.

There’s additionally a 12-speed chainring that’s solely appropriate with 56.5mm chain traces or Super Boost 157mm rear axle bikes with out chain units.

New remotes and shows

Shimano EP8 electric mountain bike motor and groupset

The distant’s buttons are actually extra concave for simpler operation.

The distant management unit has additionally been up to date with extra concave buttons, which Shimano says improves operational consolation and management whereas making it simpler to make use of the buttons.

The brand new distant – SW-EM800L – can be I-spec appropriate which implies it needs to be doable to connect appropriate dropper post levers to it, corresponding to Shimano’s SL-MT800-IL.

Shimano EP8 electric mountain bike motor and groupset

The mode selector distant has been redesigned and is now I-spec dropper publish lever appropriate.

The pc show seems to be unchanged and works in the identical approach because the previous one. It does now have the choice to vary between customisable rider profiles (extra on that shortly) and may hook up with the smartphone-based E-Tube Undertaking app through Bluetooth and appropriate third-party bike computer systems to share gear and battery data.

Larger batteries

Shimano EP8 electric mountain bike motor and groupset

The EP8 system is appropriate with Shimano’s larger 630Wh batteries.

The brand new DU-EP800 motor system is appropriate with Shimano’s electrical mountain bike batteries together with its latest and largest BT-E8016 and BT-E8063 630Wh items or smaller, however sooner charging 504Wh BT0E8035-L battery.

Shimano DU-EP800 electrical bike motor software program and software particulars

A software program re-design

Shimano EP8 electric mountain bike motor and groupset

EP8 connects to smartphones utilizing Bluetooth.

In addition to the bodily adjustments to extend torque, Shimano’s re-written its electrical mountain bike software program to regulate the way in which the motor’s torque is delivered. It hopes this can make its help really feel extra pure.

The quantity of pedalling enter torque wanted to entry help has decreased throughout the modes. Enhance mode now solely wants 20Nm of rider torque for the total 85Nm of help.

Equally, Path mode now delivers peak energy sooner, requiring solely 60Nm of rider enter as a substitute of 100Nm for the E8000 sequence motor and is claimed to be extra responsive than earlier than.

Eco mode solely delivers 30Nm of most torque and that determine is reached utilizing the same quantity of effort to the E8000 system.

Deep mode customisation and software updates

Shimano EP8 electric mountain bike motor and groupset

Energy ranges are customisable on the E-Tube app.

When linked to the E-Tube Undertaking app, it’s doable to customize the torque ranges of the three using modes between 20 and 85Nm.

Shimano’s launched rider profiles, too. Help ranges may be set for various rider profiles which implies the bike may be rapidly remodeled from an endurance, battery-saving bias to an outright energy rig.

The on-board show permits profile switching on the fly.

Shimano E-Tube Trip app updates

The E-Tube Trip app – the second Shimano electrical bike companion app used to show on-the-hoof data on a smartphone’s display screen – has been up to date, too.

New options embrace experience historical past and dwell maps plus updates to the consumer interface. The app will now mechanically sync rides with Strava, too.

The navigation characteristic makes use of a Mapbox base map that Shimano claims has “street-level element and high-level path element in forests and trails,” though details about how the system works is proscribed and makes us wonder if Shimano plans to provide a extra feature-rich show and onboard laptop like Bosch’s Nyon and Kiox systems.

Shimano DU-Ep800 electrical bike motor preliminary experience impressions

Technical editor Tom Marvin has managed to spend a while on the EP8 system forward of the launch, however hasn’t spent sufficient time on the bike but for a full evaluate.

Merida eOne-Sixty electric mountain bike with Shimano DU-EP800 motor

Tom struggled to achieve most help even when nicely beneath the 25kph restrict.
Russell Burton

I used to be fortunate sufficient to pay money for the up to date Merida eONE-SIXTY forward of the EP8’s launch, as a way to get some experience impressions on the brand new motor.

Whereas I’ve not had as a lot time as I’d like on Merida’s enduro-focused electrical mountain bike to date, I do have some transient experience impressions of the brand new motor to share.

First up, it’s price noting that the accompanying E-Tube Undertaking and Trip apps from Shimano haven’t been obtainable forward of launch, so the performance to regulate the ability settings, energy supply and create my very own profiles has not been examined but.


Merida eOne-Sixty electric mountain bike with Shimano DU-EP800 motor

The EP8 is impressively quiet.
Russell Burton

What is instantly noticeable is that the motor is considerably quieter than the E8000 motor that preceded it and people on supply from Bosch. Whereas there may be some background motor whine, it’s very quiet general, one thing that many riders will admire.

Energy on and on…

The preliminary energy supply, in each of the pre-set profiles, could be very easy.

In Eco mode the motor’s assist could be very delicate and can probably work nicely for riders on the lookout for that little serving to hand on hills and away from site visitors lights, reasonably than these on the lookout for the ‘full’ ebike expertise.

Merida eOne-Sixty electric mountain bike with Shimano DU-EP800 motor

The cost port is positioned above the underside bracket.
Russell Burton

If the reported vary extension is appropriate, the EP8 may very well be nice for riders on bike excursions on the lookout for help for his or her loaded bikes over longer distances.

In each Path and Enhance modes the EP8 gives a really easy supply of its energy all through its energy band.

On the high finish, when the help drops off, there’s no cliff-edge in assist, in order that switch to fully-human powered using isn’t fairly as demoralising.

Whereas this works nicely in Path mode, I did really feel that in Enhance mode I wished to have the ability to exploit the motor’s energy all the way in which to the top of its help. I believe, although, that with the app’s adjustability, that is one thing that ought to be capable of be programmed in.

Merida eOne-Sixty electric mountain bike with Shimano DU-EP800 motor

My Merida take a look at bike has the built-in Shimano BT-E8036 battery.
Russell Burton

Path mode is probably going the place mountain bikers will spend most of their time. Right here, the motor’s help degree appears to simply complement the hassle put by the pedals.

This implies there’s loads of torque management when manoeuvring up steep, free or technical climbs, with out a lot in the way in which of uncontrolled wheel spin.

Merida eOne-Sixty electric mountain bike with Shimano DU-EP800 motor

There’s extra floor clearance as a result of the motor’s dimension has been diminished.
Russell Burton

Whereas the earlier technology E8000 motor was very nicely mannered, the EP8 feels simply that little extra refined on this respect.

As talked about, I want to spend extra time on the Merida eONE-SIXTY to get a greater grip of each the bike and the motor.

Some niggles

Nevertheless, if I used to be to attract any early criticisms, it might be that I struggled to get the motor to supply its full degree of help (as indicated by the sliding scale on the motor’s show unit) even when tackling steep climbs and placing in as a lot guide effort as I may.

Merida eOne-Sixty electric mountain bike with Shimano DU-EP800 motor

The motor’s energy cut-off too rapidly.
Russell Burton

This might be a results of the ability supply tailing off to provide a smoother transition to non-powered using, however on steep pitches I used to be to date off the 25kph restrict that, actually, I’d like the total 85Nm of energy to be simply delivered on this state of affairs.

As ever, extra time, and entry to the app, might negate this preliminary criticism.