Hi all,
I have two XTR M952 BB's with different spindle lengths, one is 112.5 and another is 116:
The left one (112.5) is definitely OK and I used it for some time. As for the right one, I grabbed it yesterday and there are two things which seem quite strange to me. First of all, it pobably has a wrong left cup: it is marked "112.5" and manual says there are different cups for 112.5 and 116. Am I right?
OK, suppose I simply got bb with a wrong cup. But another thing is much more strange. When you compare right sides you can see that spindle segments on the right are absolutely equal:
But how that's possible? 112.5 bb is for 47.5mm chainline, and 116 bb should give 50mm chainline by adding only one 1mm spacer. 50-47.5=2.5 is not equal to 1! I'm really confused.
Any ideas?
I have two XTR M952 BB's with different spindle lengths, one is 112.5 and another is 116:
The left one (112.5) is definitely OK and I used it for some time. As for the right one, I grabbed it yesterday and there are two things which seem quite strange to me. First of all, it pobably has a wrong left cup: it is marked "112.5" and manual says there are different cups for 112.5 and 116. Am I right?
OK, suppose I simply got bb with a wrong cup. But another thing is much more strange. When you compare right sides you can see that spindle segments on the right are absolutely equal:
But how that's possible? 112.5 bb is for 47.5mm chainline, and 116 bb should give 50mm chainline by adding only one 1mm spacer. 50-47.5=2.5 is not equal to 1! I'm really confused.
Any ideas?