Tires, tires, tires

7006 messages, Last post on Oct 29, 2009 at 11:24 AM

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What is this discussion about? Tires, Wheels, Steering

Edmund's Feature Article: Tire Safety: Don't Ignore the Rubber on the Road

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Outline

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#6937 of 7006 Re: shifted belts = free tires from "Discount tire" [spdrplnt] by kiawah Jun 28, 2009 (2:32 am)
Replying to: spdrplnt (Jun 27, 2009 10:45 pm) You don't mention the manufacturer of the tire, but it is rare to have a shifted belt on a tire from a reputable company. So the odds that you would statistically end up with 4 out of 4 tires all having a shifting belt would be very low. To end up with 4 of 4, they'd have to have some major wrong with the manufacturing process which would effect all of their tires, and you'd hear about it in the newspapers or internet. So on the surface, I would find it hard to accept your mechanics assessment. What is the symptom of the problem that is causing you to take it to the mechanic in the first place? How old is the vehicle, how many total miles on the vehicle, how many miles on these tires, has the vehicle been recently aligned, has the vehicle had any suspension parts replaced, vehicle ever been in a major accident, are you the original owner of this vehicle so that you understand it's history, etc? Now could you have 4 tires which are causing vibrations at 60 mph, yes. But this symptom could be caused by vehicle out of alignment or worn suspension parts, which cause unusual wear on the tire, which makes the tire go out of balance or out of round. Could you also have a damaged wheel, yes. Replies to this message: spdrplnt (Jun 28, 2009 7:40 am) kyfdx (Jun 28, 2009 8:24 am) kiawah (Jun 28, 2009 8:26 am) imidazol97 (Jun 28, 2009 9:19 am)
#6938 of 7006 Re: Shifted belts? dicount tire - free tires? [spdrplnt] by capriracer Jun 28, 2009 (2:58 am)
Replying to: spdrplnt (Jun 27, 2009 10:22 pm) First, belts do not shift. There's a long story behind this, and it took place a long time ago. It is no longer valid. Some folks use the term when they see tires with irregular wear - and some use the term to mean tires with separated belts. What is most likely is that you have irregular wear. Irregular wear is caused by misalignment and aggravated by insufficient inflation pressure and insufficient rotation practices. My experience says that the published alignment tolerances are too wide. Not the target value, but the allowable deviation from that value. I think it ought to be half of what is published. Put another way, the alignment should be within the inner half of the spec. You should be aware that even vehicles that do not have a pull can be out of alignment. There are settings where one out of spec condition is offset by another out of spec condition – typically camber vs toe. So I think both are wrong.
#6939 of 7006 Re: shifted belts = free tires from "Discount tire" [kiawah] by spdrplnt Jun 28, 2009 (7:40 am)
Replying to: kiawah (Jun 28, 2009 2:32 am) 3 tires are Douglas, 1 is Dominator. they're about 3 years old, I'va has the care for about 5 years, I bought at 35,000, it now has 75000. Discount tires free replacemet guarentee is supposed to cover any defect of the tire that is not normal wear.. Brought to mechanic b/c of shaking when hitting breaks at high speed. brakes are fine, though since he resurfaced the rotar that doesn't happen anymore, but he did note that the tires are egg shaped Replies to this message: kyfdx (Jun 28, 2009 8:24 am) kiawah (Jun 28, 2009 8:26 am) imidazol97 (Jun 28, 2009 9:19 am)
#6940 of 7006 Re: shifted belts = free tires from "Discount tire" [spdrplnt] by kyfdx HOST Jun 28, 2009 (8:24 am)
Replying to: spdrplnt (Jun 28, 2009 7:40 am) I'd guess that the cheap tires are just worn out... Since your mechanic doesn't do tires, I'd guess that he doesn't balance tires, either? An unbalanced tire/wheel will look like it's out of round, if you spin it.. If resurfacing the rotors stopped the high-speed braking vibration, then the rotor was definitely the problem.. You probably need new tires, but I'd have someone look over the rest of your suspension/alignment... If you have suspension problems that are creating early tire wear, then getting new tires will just mask the problem, until the new tires start wearing abnormally..
#6941 of 7006 Re: shifted belts = free tires from "Discount tire" [spdrplnt] by kiawah Jun 28, 2009 (8:26 am)
Replying to: spdrplnt (Jun 28, 2009 7:40 am) The symptom you mention of vibration when braking, would typically be warped rotors. Sometimes you can cut the rotor down, but the better fix is to replace the rotor. I would not be surprised if this vibration came back, as the thinner metal makes it even easier to warp. You are better off with matched tires on the same axle. Not sure how you ended up with one odd ball. Replies to this message: imidazol97 (Jun 28, 2009 9:19 am)
#6942 of 7006 Re: shifted belts = free tires from "Discount tire" [kiawah] by imidazol97 Jun 28, 2009 (9:19 am)
Replying to: kiawah (Jun 28, 2009 8:26 am) >Sometimes you can cut the rotor down, but the better fix is to replace the rotor. Also it's better to find if an exterior problem caused the rotor to warp, such as dragging slides on the caliper that had rusted or tightened up in some way or the piston not pulling back as it should or even a defective brake hose to that caliper.
#6943 of 7006 PS2 ZP experience? by prema1 Jul 02, 2009 (10:21 am)
Does anyone have experience with michelin PS2 ZP tires? I am curious how they compare with regular non run flat tires? Also are they much less harsh than Bridgestone runflats (which I find to be very harsh)? Debating whether to to get the regular or the ZP model. Thoughts?
#6944 of 7006 ??? by krzyss Jul 02, 2009 (7:51 pm)
Do you have TMPS? Krzys Replies to this message: prema1 (Jul 03, 2009 7:29 pm) kiawah (Jul 04, 2009 6:20 am) krzyss (Jul 04, 2009 2:41 pm)
#6945 of 7006 Re: ??? [krzyss] by prema1 Jul 03, 2009 (7:29 pm)
Replying to: krzyss (Jul 02, 2009 7:51 pm) Yes I have TMPS Replies to this message: kiawah (Jul 04, 2009 6:20 am) krzyss (Jul 04, 2009 2:41 pm)
#6946 of 7006 Re: ??? [prema1] by kiawah Jul 04, 2009 (6:20 am)
Replying to: prema1 (Jul 03, 2009 7:29 pm) or TPMS (Tire Pressure Monitoring System) Replies to this message: krzyss (Jul 04, 2009 2:41 pm)