Yeah, just had a quick look. Unless they measure electrical power into the drive unit and mechanical power out of the motor at the crank with the same external load conditions across the different bikes, they are mostly measuring whole bike drivetrain efficiency intertwined into the result... not a pure motor efficiency number.
I can see lots of cables and wires. Its hard to tell their exact methodology though. Its not disclosed as far as I can see.
DEKRA are legit for sure. But Dekra testing does still not turn a complete bike bench test into a motor only efficiency test. If the device under test is a whole bike, then the result is system efficiency, not purely motor efficiency. The moment mechanical output is measured downstream of the motor, everything after the motor contaminates the number.
Do they show / explain how?
Well you can see it on the Amflow in your picture. They have a flywheel coming right off the crankshaft of the motor going back to a pulley on the measurement dynometer.
My take on that was that is the input - the machine is putting in ~150w (or whatever) into the motor, and they are measuring the output at the rear wheel?
Agree with Rob, hence the road tire and you can make out a drum with mechanism (with round lightening holes) within that 80/20 extrusion below the rear tire. There inputing power via that splined coupling (where the crank arm would be) and measuring the output at the wheel. There also tapping the battery to measure consumption.
ebike-mtb.com
| Avinox | 250 W rider – max support | ~960 | ~755 | ≈ 78–79% |
Efficiency ranking (most → least)
so is that a full retration of the bosch 600wh = 800wh avinox nonsense?Well, at least when it comes to this particular example of the Avinox motor, I have to eat my words, as it's one of the MOST efficient.
Avinox M1 – In Our big e-Bike Motor Group Test
In Our 2026 Motor Group Test, the Avinox M1 Motor Goes Head-to-Head With 10 Strong Rivals – Read The Full Review To Find Out How It Fares Against The Competition!
Avinox 250 W rider – max support ~960 ~755 ≈ 78–79%
It's a great review that cuts through some of the unknowns, imo.
In this test, the M1 was both quiet AND efficient while providing best in class traction. Strong praise indeed.
- Mahle M40 — ≈ 80%
- Fazua Ride 60 — ≈ 79%
- Avinox — ≈ 78%
- Bosch CX-Race (CXR) — ≈ 78%
- maxon — ≈ 77%
- Bosch CX — ≈ 75%
- Pinion MGU — ≈ 75%
- Bosch SX — ≈ 73%
Yeah, I dont need the avinox either.I rushed into my last e-bike purchase and regretted it. Since I already had an e-bike I decided to take my time and pick the right one that will last 3-4 years; maybe until the internal transmission era is upon us!
As you know I picked the Antidote first but I'm pretty sure they went under. I placed a deposit at the beginning of September and haven't heard from them since October. They've been radio silence on social media as well. My credit card company only gave me my money back last month and I lost hundreds of dollars in reselling parts I didn't need after all.
I'm very content with my decision overall with the Wild. The bike commonly wins bike of the year and now I have what I consider to be the best motor (currently) too. Now I just wish it would get here.
Of course I'm curious if the M2 Avinox will be much improved over the M1 and maybe I would have preferred that. Even though we will see the M2 in the next 60 days, it could be another year till we really know it's true overall performance and reliability. I'm not very price sensitive, but I did get a solid deal on the Wild and that feels good as I really just wanted the frame and motor anyways as the rest is irrelevant to me. I would have had to pay full price for the new Avinox Wild.
Plus there is the reliability/ serviceability component. There are quite a few reports coming out now about the M1 having significant failures and part shortages. That's unheard of with the Gen 5 Bosch. That matters to me long term.
As I've mentioned a few times before, the extra power of the avinox is totally meaningless where I'm at and to me. Sure we have some proper steep bits but they're also windy single track trails for the most part. I have friends running full power Boschs and they turn them down a bit even on the steepest bits as they mostly say it's just too much.
ebike-mtb.com
| Motor | Efficiency | Mechanical Wh from 800 Wh |
|---|---|---|
| Mahle M40 | 80% | 640 Wh |
| Fazua Ride 60 | 79% | 632 Wh |
| Avinox | 78.5% | 628 Wh |
| Bosch CX-R | 78% | 624 Wh |
| maxon | 77% | 616 Wh |
| Bosch CX | 75.5% | 604 Wh |
| Pinion MGU | 75% | 600 Wh |
| Bosch SX | 73% | 584 Wh |
| S-Works 3.1 | 71% | 568 Wh |
Absolute (percentage point) difference
Relative (percent) difference
Important: Compare power losses too
SummaryWas this in reply to me? If so it seems a somewhat rude way of phrasing it.
max power, fixed rider input. how else do you want to compare different motors? every other mode is not comparable, as they all mean different things in different motors. therefore, max power as it is the only setting that means the same thing on every motor so you have base line
"Trail" mode, ie the mode that the manufacturer has the bike start at by default and assumes you will spend most of your time in. The max power modes are all different too, we aren't looking for a "range" figure here, but efficiency. The motor will have a relatively narrow band in which it is most efficient so the manufacturer ought to tailor their main general purpose mode to this band.
