car is rocky / bumpy at low speeds

[osiriskidd]

any ideas.
i think it might be a bent rim.
was reading up and it could possible be lots of other things.
gonna see tomorrow. >.<

or maybe just inbalance of tires due to the front two balding.

[Schugg]

probably little chance of this being it but i seen a guy riding with loose lug nuts on one tire once, when he was going slow it was bouncing around alot, like it was going to fall off, then when he sped up it smoothed out. i tried to pull up beside him and tell him but he was old and foreign and just looked at me like i was a retard or i was assaulting him and rolled his window up.

[chip P.]

wow..somebody who finally did some hw on their own. reps for u.
research ftw

[jcs]

the inner chord on the tire could have snapped

[osiriskidd]

the inner chord on the tire could have snapped

that's interesting. never heard of that. care to explain?

[Kaiser]

The steel/polyester/nylon/rayon plies of the radial belt can break, causing them to separate. This causes lumps in the tire and eventually spreads across the whole tire as the stress from the separated belts cause other belts to break.

Anyways, a brief and simple rule of thumb is: Most Vibrations between 40-55 are caused by imbalance that has to do with the weights of the tire being off, and can be fixed by a balancing machine. Vibrations that are more severe above 55 than in the 45-55 range are caused by Road Force, which is the tire assembly being overall out of round. This can be because of a bad tire or a bent wheel, or both. This can be measured by a newer balance with road force measuring and can sometimes be fixed by Indexing the tire to the wheel, so that they make a better assembly overall. Doesn't always work. Low-speed vibrations are often caused by something being loose in the suspension.

My suggestion? As soon as possible check every bolt for tightness, could be a number of things, not the least of which is the already suggested loose lugnuts. Could be a bad tire too though.

[jcs]

that's interesting. never heard of that. care to explain?

^^he just did.lol

[osiriskidd]

The steel/polyester/nylon/rayon plies of the radial belt can break, causing them to separate. This causes lumps in the tire and eventually spreads across the whole tire as the stress from the separated belts cause other belts to break.

Anyways, a brief and simple rule of thumb is: Most Vibrations between 40-55 are caused by imbalance that has to do with the weights of the tire being off, and can be fixed by a balancing machine. Vibrations that are more severe above 55 than in the 45-55 range are caused by Road Force, which is the tire assembly being overall out of round. This can be because of a bad tire or a bent wheel, or both. This can be measured by a newer balance with road force measuring and can sometimes be fixed by Indexing the tire to the wheel, so that they make a better assembly overall. Doesn't always work. Low-speed vibrations are often caused by something being loose in the suspension.

My suggestion? As soon as possible check every bolt for tightness, could be a number of things, not the least of which is the already suggested loose lugnuts. Could be a bad tire too though.

awesome thanks.

[yunglaosta]

tie bar?