ColinJ
Puzzle game procrastinator!
- Location
- Todmorden - Yorks/Lancs border
I have a triple chainset on my Basso. I have just stripped the transmission down to clean it and to replace the bottom bracket.
In doing so. I noticed that the middle and little rings are starting to show visual signs of wear. (The chain is not slipping so the wear is not yet too bad, but I don't want to wait that long before tackling the problem.)
The chain is ok (only about 1/32" wear over 12 pairs of links). I think there is scope for spreading the wear on the rings by turning the middle ring through (say) 2/5 of a revolution i.e. 2 fixing bolts worth. My thinking is that most of the drive from the ring comes through the downstroke of the pedal and the corresponding teeth on the ring.
The middle ring is a TA replacement for the original Campagnolo ring. It does not have any ramps or pins on it so it should not matter if I rotate it and reattach it. (I can't flip it because there are recessed holes for the mounting bolts on only one side of the ring.) If this trick works, I should be able to do it another few times to spread the wear out round the ring before it finally needs replacing.
The little ring is another non-Campag ring. That one does not have ramps or pins either so I can rotate it. I also have the option of flipping it because the two sides of the ring are identical. That would spread the wear out round the ring and also allow me to wear both edges of its teeth.
The big ring has a pin on it to stop a shipped chain getting trapped between the ring and the crank so that one's orientation is fixed. There is not much wear on the big ring anyway, so that doesn't bother me.
I will give this a go. I was just wondering if anybody else does this, and if so, what the results are? In theory, it ought to significantly extend the lifetime of the rings?
In doing so. I noticed that the middle and little rings are starting to show visual signs of wear. (The chain is not slipping so the wear is not yet too bad, but I don't want to wait that long before tackling the problem.)
The chain is ok (only about 1/32" wear over 12 pairs of links). I think there is scope for spreading the wear on the rings by turning the middle ring through (say) 2/5 of a revolution i.e. 2 fixing bolts worth. My thinking is that most of the drive from the ring comes through the downstroke of the pedal and the corresponding teeth on the ring.
The middle ring is a TA replacement for the original Campagnolo ring. It does not have any ramps or pins on it so it should not matter if I rotate it and reattach it. (I can't flip it because there are recessed holes for the mounting bolts on only one side of the ring.) If this trick works, I should be able to do it another few times to spread the wear out round the ring before it finally needs replacing.
The little ring is another non-Campag ring. That one does not have ramps or pins either so I can rotate it. I also have the option of flipping it because the two sides of the ring are identical. That would spread the wear out round the ring and also allow me to wear both edges of its teeth.
The big ring has a pin on it to stop a shipped chain getting trapped between the ring and the crank so that one's orientation is fixed. There is not much wear on the big ring anyway, so that doesn't bother me.
I will give this a go. I was just wondering if anybody else does this, and if so, what the results are? In theory, it ought to significantly extend the lifetime of the rings?
