2 Different kinds of tires

[Doity]

I went to go check what the maximum psi on my tires were and noticed that I have two different tire types on there. Kitty corner from each other. I have two Toyo brand with a maximum of 46psi and another brand that has a max of 36psi. All of the tires are at 30psi right now. Which tires should I put on the front and back? or should i just leave it be?

Thanks for your time

[carsrus]

If you have the same kinds of tires on one axle your fine. aka front tires the same and back tires the same.

Tires with best thread should technically be on the front.

[Doity]

Well that's good to know, because i have one of each on both axles. :S

I wonder why the previous owner would have done that.

Also, should i inflate both tires to the same psi, or proportionally to each tires maximum tolerance?

[islandboy57]

Originally Posted by carsrus

If you have the same kinds of tires on one axle your fine. aka front tires the same and back tires the same.

Tires with best thread should technically be on the front.

Yes, you should have matching tires on each axle at the very least.

However, the best tires should be on the rear, not the front.

http://www.tirerack.com/tires/tirete....jsp?techid=52

Intuition suggests that since the front tires wore out first and because there is still about half of the tread remaining on the rear tires, the new tires should be installed on the front axle. This will provide more wet and wintry traction; and by the time the front tires have worn out for the second time, the rear tires will be worn out, too. However in this case, intuition isn't right...and following it can be downright dangerous.

When tires are replaced in pairs in situations like these, the new tires should always be installed on the rear axle and the partially worn tires moved to the front. The reason is because new tires on the rear axle help the driver more easily maintain control on wet roads since deeper treaded tires are better at resisting hydroplaning.

Having the more worn tires up front can lead to understeer, while having them in back can lead to oversteer; the latter being more dangerous and hard to control. My local tire shop and Costco will NOT install new tires on the front axle if the rears are significantly more worn. They will always be moved to the front and the new tires put on the rear.

[islandboy57]

Originally Posted by Doity

Also, should i inflate both tires to the same psi, or proportionally to each tires maximum tolerance?

Keep your tires inflated at the same PSI all around. Personally, I keep my tires at 34 PSI. All a matter of personal preference really so long as you don't stray too far and under or over inflate your tires.

[bigbird]

between 30 and 40 psi is where ya want them, reguardless of brand.

[flyeri]

Read the sticker on the door or door post for proper tire pressure. Probably in the 31-34 psi range when checked cold. the max tire pressure on the tire is not the correct pressure for your car for normal driving.

[WISHYWASHY]

Originally Posted by islandboy57

Yes, you should have matching tires on each axle at the very least.

However, the best tires should be on the rear, not the front.

http://www.tirerack.com/tires/tiretech/techpage.jsp?techid=52



Having the more worn tires up front can lead to understeer, while having them in back can lead to oversteer; the latter being more dangerous and hard to control. My local tire shop and Costco will NOT install new tires on the front axle if the rears are significantly more worn. They will always be moved to the front and the new tires put on the rear.

I just had a pair of new tires put on my car, the guy who installed them
put the new ones in the front for me and left my old rear tires in the back.

will go back to get the other two this weekend.

[Doity]

Originally Posted by flyeri

Read the sticker on the door or door post for proper tire pressure. Probably in the 31-34 psi range when checked cold. the max tire pressure on the tire is not the correct pressure for your car for normal driving.

Is this relevant if they are not the stock tires? I am only assuming that toyota put 4 tires of the same brand on the car off the floor.

Thanks

[Chris Crash]

It should be relevant. I always put my tires up to 36 no matter what they say.
If you can visibly see it's too low or too high, then you need to make some adjustments.