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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Tire falls off the rim...
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[QUOTE="rmc_olderthandirt, post: 1078065, member: 68872"] If the bead was and still is in place then there isn't a problem! Like others have said, we have a terminology problem here...... And what was that air pressure? If the tire comes off the rim, it must be coming off at the bead. The tire sidewall can't be more than 4 or 5 inches tall so I don't know where you are measuring 7 or 8 inches. When you say "bead" are you referring to the valve stem (where you put air in) ??? Does it start peeling off the rim 7 inches radially measured from the valve stem? Is there a bend in the flange of the rim at that spot? If you can show us a picture with the tire in the bad condition then we will at least get the terminology figured out. A bit of glossery: Bead: the inner most diameter of the tire. The bead is heavily reinforced with steel wires so that it doesn't stretch and holds tight against the seat. flange: The largest diameter of the rim. To install the tire the tire must be pryed over the flange. The flange keeps the tire from slipping off the seat to the outside. (air pressure and a slight "bump" keep the bead from slipping off on the inside). Note that the flange can be easily damaged from hitting rocks, curbs, etc. seat: The part of the rim that is in contact with the tire bead. When measuring the size of the wheel it is the diameter of the seat that matters, not the flange. Rim: what the tire mounts to. Generaly used to describe the collective parts of the flange, seat, etc. valve stem: Where you put air in. Part of the tube on a tube type installation, or mounted in the rim on a tubeless installatation. Wheel: the assembly of the hub, spokes, rim etc. I suspect that the problem is that the flange is bent and/or broken. Hitting a sharp corner hard, such as a curb, can bend the flange even when the air pressure is proper. Riding on low air pressure is asking for a bent flange. Riding on a flat tire will almost assure a bent flange. Send a picture if you can, then we can stop guessing. [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Tire falls off the rim...
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