Tire Problems
12-17-07, 11:15 PM
#26
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WHAT CAN YOU TELL THIS GUY??????
hmm...............2 tires? Im a mechanic everyday to pay bills. If I see lumps in tires??? You could have a blow out. Or gimme money to fix it? When is your state inspection due? IDK LOL GRRR What to do? 
hmm...............2 tires? Im a mechanic everyday to pay bills. If I see lumps in tires??? You could have a blow out. Or gimme money to fix it? When is your state inspection due? IDK LOL GRRR What to do?
12-18-07, 03:51 AM
#27
Smoke moar
Thread Starter
but yeah the tires gonna go anyday and its raining now so were getting a new one
NO I didn't mean a pic of the buldges, you can hardly see them unless you go eye level to the tire, I ment of the side of the tire where you can see the rubber, it does look like its pretty old but I haven't a clue thus I was asking if I should take a picture, you guys could leme know if the rest of the tires are close to gone too
1 new tire for sure, most likely two, 4 isnt possible at all.
Also why is 40psi too high, I love the way it feels (No these arnt stock tires) they say like 30-50 on them or something similar so if its at 40 why is that bad? Its not exceeding the cold air pressure that their rated for.
12-18-07, 07:56 AM
#28
No maan, 40 is too much for the street. I only ran 40PSI autocrossing. Don't look at the max. #'s on the tire sidewall. Look at the sticker in your door jamb or owner's manual. Add 2 psi for a bit more feel or up to four for high speed driving. Measure tire pressures before driving for the day (tires cold). Start with 35psi on all four, then go from there.
Also, in case it hasn't been mentioned, get two rear tires.
j.k. Did you buy the tires yet?
Also, in case it hasn't been mentioned, get two rear tires.
j.k. Did you buy the tires yet?
12-18-07, 11:47 AM
#30
Former Moderator. RIP Icemark.
Fill a balloon with as much air as you can. then sit it on the floor and try and balance a med sized dictionary on it. What happens??? The book rolls off, it won't balance. Why? Because the balloon can not level around enough to support the book. In fact the contact patch of the balloon is pretty small.
Now fill a 2nd balloon with 3/4 full of air. Lay the dictionary on it. Look the book lies on the balloon and the balloon levels with a lot of contact to the ground.
So, too much air, and the balloon only touches the ground in the very middle. Just right amount of air the balloon touches a lot of ground. Your tire works the same way. Too much air and it only touches in the middle (this shows as wear only in the middle of the tread) and you have a smaller contact patch with the ground (resulting in reduced grip). And then you will also get the tire wearing unevenly, with the middle of the tire's tread wearing out faster than the sides, as the middle section is bowed out due to too much air.
Like this:
Now too little air and the tire wears on both the side walls. This is equally bad as then the middle section of the tread actually bows up, and you only grip in the sides of the tread.
It wears looking like this:
and finally from tire rack on over inflation:
Originally Posted by Tire Rack
Advantages of Correct Tire Inflation
Maintaining correct tire inflation pressure helps optimize tire performance and fuel economy. Correct tire inflation pressure allows drivers to experience tire comfort, durability and performance designed to match the needs of their vehicles. Tire deflection (the tread and sidewall flexing where the tread comes into contact with the road) will remain as originally designed and excessive sidewall flexing and tread squirm will be avoided. Heat buildup will be managed and rolling resistance will be appropriate. Proper tire inflation pressure also stabilizes the tire's structure, blending the tire's responsiveness, traction and handling.
Disadvantages of Overinflation
An overinflated tire is stiff and unyielding and the size of its footprint in contact with the road is reduced. If a vehicle's tires are overinflated by 6 psi, they could be damaged more easily when encountering potholes or debris in the road, as well as experience irregular tread wear. Higher inflated tires cannot isolate road irregularities as well causing the vehicle to ride harsher and transmit more noise into its interior. However, higher inflation pressures reduce rolling resistance slightly and typically provide a slight improvement in steering response and cornering stability. This is why participants who use street tires in autocrosses, track events and road races run higher than normal inflation pressures.
Maintaining correct tire inflation pressure helps optimize tire performance and fuel economy. Correct tire inflation pressure allows drivers to experience tire comfort, durability and performance designed to match the needs of their vehicles. Tire deflection (the tread and sidewall flexing where the tread comes into contact with the road) will remain as originally designed and excessive sidewall flexing and tread squirm will be avoided. Heat buildup will be managed and rolling resistance will be appropriate. Proper tire inflation pressure also stabilizes the tire's structure, blending the tire's responsiveness, traction and handling.
Disadvantages of Overinflation
An overinflated tire is stiff and unyielding and the size of its footprint in contact with the road is reduced. If a vehicle's tires are overinflated by 6 psi, they could be damaged more easily when encountering potholes or debris in the road, as well as experience irregular tread wear. Higher inflated tires cannot isolate road irregularities as well causing the vehicle to ride harsher and transmit more noise into its interior. However, higher inflation pressures reduce rolling resistance slightly and typically provide a slight improvement in steering response and cornering stability. This is why participants who use street tires in autocrosses, track events and road races run higher than normal inflation pressures.
12-18-07, 01:02 PM
#33
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You should never put just one tire on the drive wheels.
Unless your new tire is within a certain amount of wear to the old one (usually 1/32 to 2/32) you run a very serious risk of causing drive line chatter or differential damage. Your diff will think that one side of the car is going slower than the other side and try to correct the issue. Same problem with doing one front tire on a Civic or some other FWD vehicle.
If a new tire has 11/32 and your old tires are worn down to 5/32, your asking for trouble. If you can't afford two new rear tires you shouldn't drive the car until you can.
Unless your new tire is within a certain amount of wear to the old one (usually 1/32 to 2/32) you run a very serious risk of causing drive line chatter or differential damage. Your diff will think that one side of the car is going slower than the other side and try to correct the issue. Same problem with doing one front tire on a Civic or some other FWD vehicle.
If a new tire has 11/32 and your old tires are worn down to 5/32, your asking for trouble. If you can't afford two new rear tires you shouldn't drive the car until you can.
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