100MM BBSHD, BBS02, TDSZ2 on a 68 MM BB? consequences?

[jackarneson]

I have a Norco Torrent 2023. I would like to put either a TDSZ2, BBS02, or BBSHD on this bike. This bike has a 30T front chainring & chainstays (29er) that are flared out quite a bit. I assume, maybe wrongly, that I will probably have to shim out the above motors on the drive side quite a bit to clear the chainstays. This will most likely leave little or no threads left on the non-drive side of the motor axle?

My question is, If I use the 100MM motor version on this 68/73MM BSA BB, then... What will the consequences be? Is this standard practice? I know this will push the chainline to the outside of the 11 speed cassette. Is there any way to fiddle with the cassette or replace it to get the chainline good? Interested to know a little more.

Thanks

 

[Nomadstealth]

Even if you only need 10mm of spacers on the drive side it will make 3 or more of your gears nearly unusable and there’s nothing that can be done about it .

A 68/73 motor on a 68/73 bottom bracket is always best .

It looks like the chain stay flare could be far enough back to not be a problem , a test fit would be the only way to know for sure .

The lower ISGC would have to be cut off of the frame .

 

[Nomadstealth]

You might get it in there :-

32T chainring diameter 136.1mm diameter

BBS02 - 117.5mm diameter (58.75mm clearance needed from BB to chain stay)

BBSHD - 133mm diameter (68mm needed to clear chain stay)

 

[jackarneson]

You might get it in there :-

32T chainring diameter 136.1mm diameter

BBS02 - 117.5mm diameter (58.75mm clearance needed from BB to chain stay)

BBSHD - 133mm diameter (68mm needed to clear chain stay)

So, the BBS02 requires less room?

 

[Nomadstealth]

Yes .

Try this:-

BBS02 & BBSHD Motor Fitment Templates | BafangUSAdirect Help Center

BBS02 & BBSHD Motor Fitment Templates

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