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Well I,d tend to agree, that,s exactly how I,d imagine it to be looking at torque curve of yam motor. Trex's explanation is the theoretical efficiency as far as power transmission is concerned and makes no allowance for real situation ( ie bike won't do 20 mph in 2nd and won't climb hills in...

I realise that and crank efficiency/ motor efficency is different to overall efficiency. For example if you had a diesel engine producing max torque at 1500 rpm , it would always give better mpg to change at say 1600 rpm. ( but lower performance)Motor efficiency ( ie power produced per unit...

Seems torque peaks around 1500 rpm on electric motors in yam ( and Bosch??) mid drive..after that it drops till motor reaches peak rpm.. Was wondering how this relates to cadence rate for two reasons. A) Could be its more efficient in terms of mileage/ power use to use higher mode but higher...

I agree, cant see 2kw ( under 3bhp) getting to 38 mph..but my little enduro bike ( a 125 four stroke/ around 11bhp but 110kg) rarely ( never) gets over 20 mph on trails.. Not sure Brinco would cope with climb where I use 125 tho...its a long steep one. ( uphill 40 mins or so!!) hence questions...

Well yes ...would replace my AJP PR4 , and stop annoying walkers. Both probably !

Crack cocaine camera ?

Well all us car drivers are just working out how to get away with doubling speed limit and getting authorities to ignore it...reckon its something to do with Lycra and arses...( big smiley icon)

Nope, just loads of dongles... And he,s currently posting about his exploits in the illegal petrol field bike section..

It was Soundwave ( smiling emoticon)

Cant disagree with that...

But that bike is not illegal, looking at figures it gives between 35 and 120 Watts dependent on cadence. ???

Well that's even more reason to get us all banned ! If authorities cant identify illegal bikes they just put then all in next class up. Police have neither the time or inclination to start examining bikes, ( unless involved in accidents) so they,ll just ask for reclassification. Being able to...

And there are problems off road...lots of areas only allow pushbikes ( all National Park areas) and as we all know some areas banned to mountain bikes..Worries me that either NP will cotton on and simply ban all ebikes because some fool has fitted a pulse modifying dongle and ridden into...

That's fantastic, for you and bike.

Nice one..

I have, that's why I,ve gone for Haibike. The cadence delay was felt on Bosch but not on Yam. The technician explained it to me as I have on here. Perhaps its a little simplistic and torque comes in gradually with Bosch but its certainly a noticeable difference, and it is that. A difference ...

No apparently its designed to do it that way, not sure why. Somebody will tell us, somebody in an earlier post mentioned about avoiding traction problems but I cant see that myself but ??

Fantastic review. Bought same bike .

I,ve had a similar but much less severe issue. Basically my right knee was almost beyond repair, combination of snapped cruciates and worsening arthritis. NHS said new knee with addition of curtailing many activities...Instead opted for stem cell and graft with 5 months rehab...just about...

Its great you are getting biking again. Well done. You must have put some effort in.