Join Date: Apr 2007
Location: Syracuse, NY
Bikes: 2008 Novara Randonee - love it. Would have more bikes if I had time to ride them all. Previous bikes: 1968 Motobecane Mirage, 1972 Moto Grand Jubilee (my fav), Jackson Rake 16, 1983 C'dale ST500.
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Originally Posted by JeffThompson
I have a rim i'm about to build and its "true" by the fact that it doesn't move from side to side at all.
BUT, it is A LITTLE ?un-round?(horrible grammar)
Is there any simple way to fix this?
I really like this rim and I dont think i'm gonna find another pair anytime soon.
It's a Mavic g40 Module E 27" 1 and 1/4 rim.
Before we all take off into the yonder with suggestions, I need to clarify some things. "..rim I'm about to build.." sounds like it is not laced currently, but then how would you know "...it doesn't move side to side.."? Do you mean rebuild?
If it's not laced how do you know it's out of round? Did you measure the diameter at multiple points? If so 2-3 mm out of round is only a variation of 1-1.5 mm from center, which I don't like but is not terrible.
If it is laced we know nothing of the actual condition of the bare rim, and thus whether it is worth rebuilding, unless you manage to get all the spokes to equal tension, which is a bit of a challenge.
In either case you did not specify in which direction it is out of round. If a flat spot and not caused by too much spoke tension you would indeed need to physically move it, but you must do so carefully or you may create high spots on either side. If a high spot then odds are extremely high that spoke tension is incorrect. On a laced wheel I would not consider a deviation of 2-3mm in round "minor."
Last edited by cny-bikeman; 06-23-10 at 09:02 AM.