Chainring clearance

[dg01]

OK. So had the BB threads chased and new Shimano BB installed. Popped on the chain rings this a.m. and was surprised at how little clearance there is between chain stay and teeth on inner chainring.

What do we think - good to go? Or get a BB with a longer square taper shaft?

 

[pigman]

Re:

And bear in mind, the front mech might not move in as far as required.

If it has no chance of touching the stay even with a bit of twisting action (to mimick you putting power through the chainset), then you could try it

 

[legrandefromage]

That will flex an hit the stays - either another long BB or the tapers have flared or they're JIS/ Campagnolo/ something else taper that doesnt quite fit as expected

 

[Nob]

That will flex an hit the stays - either another long BB or the tapers have flared or they're JIS/ Campagnolo/ something else taper that doesnt quite fit as expected

Agreed looking at that photo

 

[dg01]

That will flex an hit the stays - either another long BB or the tapers have flared or they're JIS/ Campagnolo/ something else taper that doesnt quite fit as expected

It's a Shimano BB, and an SR Custom chainset.

 

[legrandefromage]

The Sr taper might have flared a bit. A longer axle will help

 

[dyna-ti]

STW thread with piccy's
http://singletrackworld.com/forum/topic ... -do-i-need

It looks like you have less clearance :?

 

[Midlife]

Oooops, by slim chance is it an asymetric axle in the wrong way?

Shaun

 

[dg01]

Oooops, by slim chance is it an asymetric axle in the wrong way?

Shaun

Don't think it could be Shaun - it's a Shimano UN55 BB http://www.chainreactioncycles.com/shim ... -prod71369 that has a fixed threaded section on one end - so I believe it can only be screwed in from the correct direction....

Fitted by the local bike store too....

 

[Midlife]

Ah well, wild stab in the dark . New BB needed. Which chainset is it? Apex?

Shaun