Hey Bicycle Mechanics!: Sprockets forum: Grassroots Motorsports Magazine

Jan. 5, 2011 7:33 p.m. Woody SuperDork

I'm part way through a rebuild of my Cannondale mountain bike and I'm trying to attach a new rear derailleur hanger. Is there a special tool to hold the back side of this fastener while I tighten the allen screw from the other side? I can't get it tight enough to keep the hanger from moving. I've tried to use a screwdriver, but I don't have one that's wide enough.

Or, does it even need to be super tight? Will the rear wheel quick release tighten it down and keep the hanger from moving?

Forgive the crappy photo.
Jan. 5, 2011 8:15 p.m. Grtechguy SuperDork

Can't really tell, show us the other side?

But it looks like the axle goes through the derailler and holds it tight.
Jan. 5, 2011 8:22 p.m. Marty! Dork

Park chainring bolt wrench. CNW-2
Jan. 5, 2011 8:43 p.m. Woody SuperDork

That's what I need. Thanks.
Jan. 5, 2011 9:21 p.m. Keith SuperDork

Why do I love Park tools more than Snap-On?
Jan. 6, 2011 4:31 a.m. thatsnowinnebago Dork

Mine are usually caked with enough gunk to hold themselves in place so I've never needed that Park tool
Jan. 6, 2011 12:19 p.m. PHeller Dork

by the way you can make that tool with a grinder and dremel and old butter knife