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Rim Flat Spots - Are they toast?(3 posts)

Rim Flat Spots - Are they toast?bimini
Oct 27, 2003 5:41 AM
I Hit a curb hard last week. I ended up with some nasty flat spots in both of my Open Pro Rims.

I am fairly good at truing up wheels and have rebuilt a couple of sets but I cannot bring these wheels in. Radially there is still a low spot. There are no creases in the rim just a low spot that is off by 1/16" to 1/8". I have loosened up the low spot to the point that the nipples don't hold and tightened the high spots but there is still too much play to my liking. (I like dead on wheels and can feel the difference).

Will tightening all the spokes but the low spot help? Does an LBS or pro wheelbuilder have any special equipment or technics for pulling out the low spot?

It is a nice set of wheels, Red OPs, DT spokes, Chorus hubs. I would like to repair these wheels and rims. Worse case is I will have to buy a new set of rims and toss the old ones.
I can't pull them outpitt83
Oct 27, 2003 6:13 AM
And my LBS can't either. I'd buy new rims and re-build.

PS: The Velocity's I hit a curb with didn't flat out. The CXP33's flatted on a stick and were trash.
Shade tree mechanic methodKerry Irons
Oct 27, 2003 6:08 PM
Totally loosen the spokes in the flatted area, tie a strap or rope around the rim at the center of the flat spot and tie the other end of the strap to something very solid (tree, light pole, etc.). Brace yourself with the wheel held in both hands and give a yank. Check to see if things sorted out. If not, yank harder. Repeat until you get it or give up in disgust. You'll never get the rim back to perfectly round, but you may get rid of noticeable bumps when riding. You must do it this way rather than relying on tightening all the rest of the spokes - if you just tighten spokes, then those at the flat spot would remain loose and you'd have an unstable wheel.