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Chainring bolt tightening?(10 posts)

Chainring bolt tightening?Slip Stream
Sep 19, 2002 4:20 AM
What is a good tool or gadget to use on the backside of a chainring bolt?
Shimano makes one...TJeanloz
Sep 19, 2002 4:30 AM
Shimano has a tool specifically for this application that you should be able to pick up for less than $5. Worst case scenario is to use a slotted screwdriver.
Tried the slotted screwdriver.Slip Stream
Sep 19, 2002 4:47 AM
can not get leverage with it. I was hoping for a jimmy-rig so I could tighten it this morning.
Chainring Nut WrenchCalvin
Sep 19, 2002 5:16 AM
See http://www.parktool.com/tools/CNW_1.shtml
Big problem with this toolAlex-in-Evanston
Sep 19, 2002 7:12 AM
As the bolt threads into the nut, it strikes the center prong on the tool. As the bolt gets tighter and deeper into the nut, it pushes the tool out of the grooves.

How can this be overcome? I've got this park tool, and a shimano one with just two teeth - but the two toother is weak and doesn't hold.

I wish they would use a beefier design on the nut.

Alex
File down the centre prong to get deep bite nmSpunout
Sep 19, 2002 7:14 AM
You sure you got the right chainring bolts?Spoke Wrench
Sep 19, 2002 10:09 AM
There's a bunch of different sizes that range from about 6mm to 16mm.
The only thing I'm sure of is that I'm a hack. (nm)Alex-in-Evanston
Sep 19, 2002 11:55 AM
re: Chainring bolt tightening?kilimanjaro
Sep 19, 2002 11:32 AM
I replaced my chainrings recently using hex wrenches if I recall.
re: Chainring bolt tightening?frankamo
Sep 19, 2002 12:04 PM
Just bought one from Branford Bike that had teeth on the other end that fit the crank bolt dust cover as well. Nice combination tool.