Bikeforums.net is a forum about nothing but bikes. Our community can help you find information about hard-to-find and localized information like bicycle tours, specialties like where in your area to have your recumbent bike serviced, or what are the best bicycle tires and seats for the activities you use your bike for.jgedwa
12-29-06, 07:57 AM
When playing with the chainline (in setting up a fixed gear bike), I often will shift the chainring from one side of the spider to the other. A couple of questions:
-when the ring is on hte outside, there is a little shoulder at the end of each arm that helps locate the ring on each arm. When I move the ring to the inside, there is no such shoulder. I think that 5 tightened bolts will do enough to keep the ring in place. Opinions?
-Usually spacers have a little shoulder on them that fits snugly into the spider arms. If I switch the ring to the other side and use those spacers they will slop around until each bolt is tightened. This one makes me a tad more worried, but an experienced mechanic I know says that even this is not relevant once the bolts are tightened.
-How long of a spacer(s) can I use between the arm and the ring before the whole thing is just not strong enough to trust? If I need to bring the chainline way in (say, if there is a long BB spindle that I do not feel like changing out) can i just use a couple of spacers on each bolt on the wrong side of the arms?
jim
-when the ring is on hte outside, there is a little shoulder at the end of each arm that helps locate the ring on each arm. When I move the ring to the inside, there is no such shoulder. I think that 5 tightened bolts will do enough to keep the ring in place. Opinions?
-Usually spacers have a little shoulder on them that fits snugly into the spider arms. If I switch the ring to the other side and use those spacers they will slop around until each bolt is tightened. This one makes me a tad more worried, but an experienced mechanic I know says that even this is not relevant once the bolts are tightened.
-How long of a spacer(s) can I use between the arm and the ring before the whole thing is just not strong enough to trust? If I need to bring the chainline way in (say, if there is a long BB spindle that I do not feel like changing out) can i just use a couple of spacers on each bolt on the wrong side of the arms?
jim