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Since you have 15 inch wheels it leads me to believe you got 80-90s pick up. After that 16s bad and standard
The difference in sidewall 70 to 75 is very minimal. Are your tires a P205-70-15 ? What is the truck S10 pick up truck? Or 1/2 ton pick up?
If its a s10 then max tire size on a 2wd is 235-70-15 with possible rub on the frame on full steering wheel lock but it's very very slight ( depending on the wheels you have)
If its a 4x4 s10 you can go to a 235-75-15.
ZR2 31-10.5-15
If its a full size c1500 you can go to a 235-75-15 with no issues and 32x11.5x15 as max biggest size with no rubbing. 33x12.5x15 will also fit but in the front will require trimming the front air dam.
I don't suggest going over a 31x10.5x15 on a c1500 or a 235-70-15 on a s10.
I had both trucks and this has been my experience.
This is a bad idea. Conventional passenger car tires are not going to have the same weight carrying capacity as tires designed for use on a light truck. Don't be cheap with your tires.
Oh and rule of thumb you usually can safely go up two tire sizes from factory. You can also find out the factory option tires for your car and go to those. Probably a 235/70 or 235/75 Some SUVs come with P rated tires from the factory. So do a lot of 1/2 ton trucks. LT rated just have a thicker sidewall for higher load capacity.
Our Chevy pickup uses 205-75-15 inch tires. We want to remove all 4 and replace with 205-70-15 inch tires from a Chevy car. Any issues since the "difference" is 3% and according to this warning you do want to stay within 3% and 205-75-15 is 3% smaller in diameter than 205-70-15.
Also, when this site says there could be braking issues, what braking issues for a tire more than 3% larger or smaller than the originals?
The difference between the height of the rim and tire is roughly 3/4 inch.... Not a big difference and certainly not enough to affect the braking or handling if the components are functioning properly...
Most of the GM vehicles have a tire size adjustment built into the computer. There are a number of sizes that can be chosen. Dealer can do it, not sure if any of the cheapie code readers will do it or not.
The shop manager that mounts our tires has a Ford pickup and he uses 70''s vs. 75's.
We don't have access to the load range, speed range on the Chevy car that has 205-70-R15 tires.
The shop manager that mounts our tires has a Ford pickup and he uses 70''s vs. 75's.
This doesn't mean much without the width. For instance, the difference in the outside diameter between a 235-70R15 and a 215-75R15 is about a quarter inch.
Quote:
We don't have access to the load range, speed range on the Chevy car that has 205-70-R15 tires.
These are on the tire itself. The load index (load range is different, it corresponds to the ply rating) is identified by a two-digit number which should be right after the size. The speed rating is identified by a single letter either tucked in the tire size or after the load range (or both). The higher the number/letter the higher the range. Wikipedia has a writeup on tire codes that includes the load index and speed rating charts.
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