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wheelset questions(7 posts)

wheelset questionsDaveG
Aug 30, 2003 1:07 PM
While out riding today I noticed my rear wheel was wobbling. After stopping, I saw that one of the drive side spokes had ripped out of the rim. This rim was an Ambrosio Balance with 32 14g spokes on a Campy hub. This is the 3rd time this has happened to me, the other two were with a Mavic Reflex and another with a Matrix Aurora. Strangely, I have never broken a spoke. So now I'm looking for new wheels. My question is am I better off with straight gauge or DB spokes? Straight gauge on drive side? More spokes? I seem to recall reading that DB spokes actually reduce stress on the wheel. I weight 170-175lbs. Please don't recommend any chi-chi low spoke count wheels - I'm cheap and like things durable. Thanks in advance for any advice
Can't go wrong....the bull
Aug 30, 2003 1:17 PM
Chorus hubs
dt swiss spokes
open pro

colorado cyclist
old age or too much tension...C-40
Aug 30, 2003 2:59 PM
A spoke pulling out of the rim is generally due to too many trueings, where the spoke tension is increased at each trueing or simply old age. If you're doing the trueing, remember that spokes can also be loosened a small amount during the process. A spoke tension gage might be a good investment.

As others recommended, it's hard to beat a good Mavic rim with 14/15 DB spokes and 3-cross lacing. You might also consider the CXP-33 rim instead of the Open Pro. Excel Sports or Colorado Cyclist both build good wheels.
never truedDaveG
Aug 30, 2003 3:50 PM
This problem surprised me because the Balance rims are pretty hefty, have never been trued or even slightly out of true, and only have 7K miles on them. I'm running CC-built Open Pro's with 14/15 and Chorus on my other bike but I don't have enough miles to judge them durable yet
Who built the wheels where you've pulled the spokeboneman
Aug 31, 2003 12:47 AM
C-40 makes a good point about getting a tensionometer if you're building your own. I'll also assume that you've checked the dish on the wheel and haven't trued them up too far towards the drive side?

I'm surprised that you pulled one through on the Balance. Despite the lack of ferrules, there's a lot of rim material where the nipple comes out.
original equipmentDaveG
Aug 31, 2003 4:17 AM
These wheels came with the bike, a Marin Vicenza. Up until this point I would have said these wheels were bombproof. I carefully inspected the wheel and did not see any cracks at any other spoke junctions. I can't recall hitting anything hard or anything else that would have damaged them. I guess I just have bad luck with wheels!
Proper Truing?bimini
Sep 2, 2003 10:29 AM
I ruined a couple of rims "truing them". I only tightened spokes until the wheels was true. Now I check for any single spoke that may have rattled loose. If I find one I tighten up only that one. Otherwise I always ballance the two sides of the wheel. If I give one side a 1/4 turn tight I give the tightest adjacent spoke on the opposite side a 1/4 turn looser. No more rim problems.