BB with TS motors to suit modern 32-34t chain ring bicycles?

[RiverRat]

I've been trying to match up a torque sensing bottom bracket motor to various modern FS bikes but 100% of the bikes I'm interested in only accept smaller chainrings. It seems that all the BB with TS kits I can find will mate up but they're only geared for speed with a 46t. Drop a 32t on it and forget about hitting 60kph anymore.

TBH I've just about given up looking for now and this is bit of a last ditch attempt looking for suggestions.

Ta.

 

[glennb]

I suspect you’ll find they’ll fit, even with 46t, because their chainlines are likely >55mm.

The limitation is right chainstay clearance.

All you need to do is measure 97mm (46t ring radius) back from the centre of the bottom bracket, and out from the rear triangle centreline by 55mm, to see if the ring will clear the chainstay at this point.

Also, there are “adapters”, for rings smaller than the stock configuration. You could add that to your search terms to get an idea of what’s possible.