TallRider

I was looking for a 130mm inner chainring to use on a friend's bike with 6-speed Shimano drivetrain (and fat early Uniglide chain). All of the 9- or 10-speed inner rings in my bin sit too close to the outer chainring. So I used a very worn-out 10-speed chainring (that someone had run with a chain that should have been replaced), and flipped it around. Clean side of the chainring teeth now pulling the chain, and the proper width away from the large ring. Nice when stuff like this works.

blamester

Nice one.How often have you stripped everything down only to find it won't work no matter what you try?

TallRider

do you mean "put stuff together and then find it won't work"?
I've done that a few times, but mostly I figure the issue before putting everything back together (like when I mounted a 9spd 39t ring on this crank and realized the wider 6-speed chain would rub against the outer 53t chainring)

gitarzan

Necessity is the mother of invention. Huh?

TallRider

Yup. No reason to pay for a 39t 8-speed era chainring for a $150 mid-1980s road bike.

TallRider

well, I need to take this back. The flipped 10-speed chainring sits too far away from the outer ring, so even a wide (external) 6-speed chain "skates" when shifting from the big ring back to the small ring. Tossing it.