Shimano boosts ebike energy 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 growing it in Eco mode.
The brand new motor is lighter than the outdated one, too.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 quantity and due to this fact the width of the brand new motor by 10 per cent, too.
5 issues you could learn about Shimano’s new DU-EP800 motor
- Boosted to 85Nm torque
- Discount in weight to a claimed 2.6kg
- Narrower 177mm Q-factor
- Claimed 36 per cent lower in pedalling drag
- Identical vary because the outdated mannequin in Path mode, enhance in vary in Eco mode
Shimano has additionally tweaked the EP8’s software program to supply a “extra pure feeling e-mountain bike”. It’s performed this by adjusting how the three help modes work and providing user-customisability of these modes by way of itsE-Tube Experience and E-Tube Undertaking apps.
Shimano DU-EP800 electrical bike motor particulars
Extra torque, much less weight
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.
Similtaneously growing torque, Shimano’s managed to cut back claimed weight to 2.6kg from 2.9kg for the outdated E8000 system.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 offers it a “best-in-class” energy to weight ratio.
Diminished friction, greater vary
Battery effectivity, and due to this fact vary, has been improved, too. Shimano’s performed this by lowering 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 individuals have likened pedalling an electrical bike with out help to using by glue. These sensations needs to be lowered 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, although torque has elevated general, battery vary in Path mode stays the identical.
Higher thermal administration, decrease quantity
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 raised warmth management because of their smaller dimension. They will additionally transmit extra knowledge, 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 lowered, 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.
Regardless of its discount in dimension, it makes use of the identical body mounting sample because the E8000 and E7000 items, which suggests bike manufactures can spec any three of these motors on their frames.
It additionally opens up the opportunity of retrospective upgrades to current E8000 and E7000 homeowners, nevertheless Shimano’s press launch doesn’t point out whether or not that is or isn’t attainable.
The brand new DU-EP800 can 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 fundamental FC-EM600 crank – that appears suspiciously much like Shimano’s new Deore M6100 crankset – can also 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 includes 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
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 also be I-spec appropriate which suggests it needs to be attainable to connect appropriate dropper post levers to it, comparable to Shimano’s SL-MT800-IL.
The pc show appears to be like unchanged and works in the identical method because the outdated one. It does now have the choice to alter between customisable rider profiles (extra on that shortly) and might hook up with the smartphone-based E-Tube Undertaking app by way of Bluetooth and appropriate third-party bike computer systems to share gear and battery data.
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 utility particulars
A software program re-design
In addition to the bodily modifications to extend torque, Shimano’s re-written its electrical mountain bike software program to regulate the best way the motor’s torque is delivered. It hopes it will 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 complete 85Nm of help.
Equally, Path mode now delivers peak energy sooner, requiring solely 60Nm of rider enter as an alternative of 100Nm for the E8000 collection 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 utility updates
When related to the E-Tube Undertaking app, it’s attainable 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 suggests the bike may be rapidly reworked from an endurance, battery-saving bias to an outright energy rig.
The on-board show permits profile switching on the fly.
Shimano E-Tube Experience app updates
The E-Tube Experience app – the second Shimano electrical bike companion app used to show on-the-hoof data on a smartphone’s display – has been up to date, too.
New options embrace journey 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 restricted and makes us ponder whether Shimano plans to supply a extra feature-rich show and onboard pc like Bosch’s Nyon and Kiox systems.
Shimano DU-Ep800 electrical bike motor preliminary journey 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.
I used to be fortunate sufficient to pay money for the up to date Merida eONE-SIXTY forward of the EP8’s launch, to be able to get some journey 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 journey impressions of the brand new motor to share.
First up, it’s value noting that the accompanying E-Tube Undertaking and Experience apps from Shimano haven’t been obtainable forward of launch, so the performance to regulate the facility settings, energy supply and create my very own profiles has not been examined but.
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’s some background motor whine, it’s very quiet general, one thing that many riders will respect.
Energy on and on…
The preliminary energy supply, in each of the pre-set profiles, could be very clean.
In Eco mode the motor’s help could be very delicate and can seemingly work properly for riders searching for that little serving to hand on hills and away from site visitors lights, relatively than these searching for the ‘full’ ebike expertise.
If the reported vary extension is appropriate, the EP8 could possibly be nice for riders on bike excursions searching for help for his or her loaded bikes over longer distances.
In each Path and Enhance modes the EP8 gives a really clean supply of its energy all through its energy band.
On the high finish, when the help drops off, there’s no cliff-edge in help, in order that switch to fully-human powered using isn’t fairly as demoralising.
Whereas this works properly 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 best way to the top of its help. I think, although, that with the app’s adjustability, that is one thing that ought to be capable to be programmed in.
Path mode is probably going the place mountain bikers will spend most of their time. Right here, the motor’s help stage appears to simply complement the hassle put by the pedals.
This implies there’s loads of torque management when manoeuvring up steep, unfastened or technical climbs, with out a lot in the best way of uncontrolled wheel spin.
Whereas the earlier era E8000 motor was very properly mannered, the EP8 feels simply that little extra refined on this respect.
As talked about, I wish to spend extra time on the Merida eONE-SIXTY to get a greater grip of each the bike and the motor.
Nonetheless, if I used to be to attract any early criticisms, it will be that I struggled to get the motor to supply its full stage 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.
This might be a results of the facility supply tailing off to offer 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 complete 85Nm of energy to be simply delivered on this state of affairs.
As ever, extra time, and entry to the app, could negate this preliminary criticism.