While content with my motor and I have yet to ask more than it can deliver i have been speculating as to what would be the torque-iest motor available.. and 'legal'
Especially with the talk of allowing 500w rated motors recently too
Those Heinzmann 250w offerings however negate the need for any changes tho, but my google-foo failed when browsing for a uk distributor to us minions..
The £420 200w hub(£1200 kit) with 53Nm of torque and pedal free climbing of a 15% slope available here
https://www.electricmountainbikes.com/ is also pretty impressive!! a Heinzmann pedelec motor/kit.
circa 55% down
this page..
is all i found .. ;(
not needed at all but would be nice to know where to source the good stuff