Thanks so much John. I've often wondered about the especially pointy tooth profile. We'll give it a go. I've got some family commitments this weekend so it may be the weekend of 2/21-22. Can I be sure that I understand you correctly. Will I be filing 4 teeth altogether (2 in one location and two in a second location)? And will all the filed teeth be within the 180-degree arc that represents the recovery rather than the power part of the stroke with the right leg?
Many thanks for your interest. It's good to find someone who knows.
Originally posted by John
To improve the change file off the tops of two teeth at two points on the middle ring - not in the middle of the power stroke. Don't go to far or be tempted to do three teeth as the change will become automatic on the biggest sprockets due to the chain line.
The escapade which replaced the 80 has a slightly wider Q on the advised 118mm BB and check the right hand pedals don't wobble before you pay. The change is as bad as ever unless you file the middle ring.