Join Date: Dec 2005
Bikes: Bike Friday Crusoe and Pocket Tourist. Dahon Curve D3 and Speed P8. Raleigh Twenty. Bianchi Eros. Highly modified Mongoose Dynametric (hybrid)
Originally Posted by Chop!
that is NOT a chain tensioner! That is a piece of angled steel that helps stop the chain from falling off!
Quite right, but as far as I can see, nobody called it a chain tensioner.
What was said was that the tension on the chain loosens when the bike folds, and that the retainer picks up the slack.
I've got these retainers on both my Bike Fridays. When I fold the bike the chain loosens, and could fall off. However, with the chain retainer on the bike, the chain presses against the retainer as it folds. It's not just a guard to keep the chain from falling off to the inside. The angled part actually pushes against the bottom of the chain. That keeps enough tension on the chain to keep it on the chain ring. It only touches the chain when the bike is folded.
Last edited by DaFriMon; 02-19-06 at 06:11 PM.