I took Flecc's advise - and created a monster...

[jbond]

Interesting. I've been considering a Bafang SWXH rear or Cute-100 designed for a 20" but fitted in a 26" rim and driven by either 36v or 48v (probably 36). Same kind of idea of trying to push the max assist speed up to 25 or so but with the smallest possible motor. I don't necessarily expect the motor to drive at that speed on the flat on it's own. I just don't want the assist to just disappear at 20.

 

[flecc]

This is what I liked about the eZee system on the old Torq 1 and Quando, and apparently on the modern kit. No
cut off, just running to the maximum revs the voltage supplied supports so with gentle power phase-down.
.

 

[NeilP]

The other consideration I had was that the frame was only really designed for 44T max being a mountain bike, and 48T was the largest I could squeeze in before it hit the stays.

Andrew

OK,

I had the same issue with my (non electric) MTB, I also found that 48T was the max I could get on, so I adjusted the BB out slightly to one side, and that enabled me to put on a 53, although I have gone back to a 50, with a homemade 11-21 rear speed block.

 

[Lloyd]

That's an impressive build and certainly value for money.

One question though, that looks to me more like a 4-bar suspension link as opposed to a virtual pivot. If so, did the original rear chainstay incorporate the Horst link? I think it would perform even better if you incorporated Horst within that rear dropout, I am interested to hear if you tried it.

Also what rear shock are you running (Being a mountain biker myself I get very nosey when something like this arises )?

I am currently building a 'Project X' off road specific Raleigh Leeds Tour, with the idea to take it to Wales once I get a spare day.

Keep up the good work, the battery box looks very impressive.

 

[am001]

That's an impressive build and certainly value for money.

One question though, that looks to me more like a 4-bar suspension link as opposed to a virtual pivot. If so, did the original rear chainstay incorporate the Horst link? I think it would perform even better if you incorporated Horst within that rear dropout, I am interested to hear if you tried it.

Also what rear shock are you running (Being a mountain biker myself I get very nosey when something like this arises )?

I am currently building a 'Project X' off road specific Raleigh Leeds Tour, with the idea to take it to Wales once I get a spare day.

Keep up the good work, the battery box looks very impressive.

Hi Lloyd,
Yes it is really a 4 bar link, but its not a parallel motion, it has been tweaked so as it has a virtual pivot forward of the chainring, hence my use of this description. forgive me if my use of the terminology isn't right...
The shock is a RockShox Ario 2.1, which seems good so far.

Regards
Andy