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Durace chain ring trueness(4 posts)

Durace chain ring truenessbiker
Feb 3, 2002 5:34 PM
Just curious how many are noticing some trueness issues with
newer Durace chain ring /crank arms. I have about 1/16" deviation outward when crankarm is at it's highest point of stroke.
re: Durace chain ring truenessDave Hickey
Feb 3, 2002 7:08 PM
It's probably an illusion. The ring ramps make the rings look like they are out of true. When I first bought nine speed D/A rings, I thought the same thing.
re: Durace chain ring truenessmosovich
Feb 3, 2002 8:01 PM
Mine look like they are out of whack as well. I keep cking my crankbolts, but their tight. Has to be the rings.
I've never seen a perfect chainringAlex-in-Evanston
Feb 4, 2002 6:58 AM
When you try chainrings on a single speed with a tightly bolted rear wheel, you'll see just how out of round most chainrings are.

The differences in chain tension at all points of the stroke can be quite large. I've used a half dozen differnet chainrings on ss/fixies/track bikes, and most will alternately bind and slap at opposite points of the rotation.

Incidentally, the best I've used is my 50 tooth Dura-Ace track ring.

Alex