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Tires keep bolwing off my Vector Pro's(8 posts)

Tires keep bolwing off my Vector Pro'sAndy
May 5, 2001 4:00 PM
I have a problem where my Conti GP 3000's keep blowing off my rear wheel, Rolf Vector Pro, when inflated to 120 psi. This is the rated pressure for the tire. It always blows off opposite the valve stem where the rim weld is located. If you look closely, the weld is uneven and the arc of the rim is not smooth. The rim curvature actually dips slightly at the weld area.

The wheel set is about two month old. Until recently, I was inflating to 105 psi but I'm doing longer, faster rides and I want the higher pressure.

The LBS where I purchased the wheels said the warranty guy won't be in until Monday so I took my wheel back and made arrangements to see him on Monday. I still have to get in two rides this weekend.

Has anyone else seen this problem with Rolf wheels? I'm going to demand they replace the rim or the entire wheel. After that I'm getting rid of 'em.
I guess I need a spell checker above (nm)Andy
May 5, 2001 4:11 PM
re: Tires keep bolwing off my Vector Pro'sDrD
May 5, 2001 4:36 PM
Two riding partners of mine use them with no problems - one is using michelins now (axial supercomps, I think), but previously had the purple Vred's on there (at 140psi). The other runs axial pro's at 120psi with no problems. I suppose it could be either the tire or the rim - try rotating the tire a quarter of the way around and see if it blows off at the same point on the tire - if so it could be the bead of the tire is messed up - could also be the tube getting stuck under the bead (that is the classic cause for blowing off the tire - cure is to pump the tire up a little bit, then rock the tire back and forth over the rim to make sure the tube isn't under the bead)

If after trying that, it still blows off at the weld seam, I would suspect the rim - if the warranty guy thinks that, too, I imagine they will get you a new rear wheel.

In any event, in the limited set of 2 examples I have seen, this doesn't seem to be a common problem...
I run Vector Comps for training, and have had a similar problemLargo
May 5, 2001 4:46 PM
Once or twice. The Vectors are not as big a rim as some (Mavics) and unless, as the above post mentions, you make sure the tube is "set" properly under the tube(Talcum powder helps), the tire can pop off.
I agreeDave Hickey
May 5, 2001 7:12 PM
If the area that you having problems with is directly across for the valve stem, that the last part of the tire to go on the rim. Make sure you tube is seated properly underneath the tire. I use Velocity rims(someone told me Rolf uses Velocity) and they don't have as wide of lip. If the tube is not seated underneath the tire, its very difficult to get the tire to take.
No problem here with Rolf Vector Comp'sDINOSAUR
May 5, 2001 5:55 PM
I use Conti GP 3000 inflated to 120-125 psi on my '99 Klein QR. I have never had a problem....sounds like a defective rim.
re: Tires keep bolwing off my Vector Pro'sSamu
May 6, 2001 12:04 AM
2700 miles, GP 3000, never trued & no problems.
More info . . .Andy
May 8, 2001 10:55 PM
I put a different set of brand new Conti GP 3000's on (both front and rear)

I lightly dusted the NEW tubes with talcum power and carefully installed by hand only. I pumped the tires up to 60 psi and completey deflated them. I then pumped up to 80 psi and completely deflated. Again to 100 psi, deflated and then 120 psi. There is no way either tube could be binding inside the tire.

This time the front blew as I was walking into the shop. I'm going to start wearing ear plugs as part of my regular cycling experience.

They said everything looked OK with the rims. I don't believe it. The only other thing I can think of is that my floor pump has a bad pressure gauge. I think it's a Topeak Air Hammer pump. Maybe I'm really pumping them up to 160+ psi? I'll have to figure out a way to test the pump.