18x7 & 18x9
09-14-2006, 04:44 PM
#1
I don't buy Kool-Aid
Thread Starter
18x7 & 18x9
OK on tirerack.com I'm looking at getting tires for 18x7 and 18x9's it shows Front: 225/45-18 and Rear: 245/40-18 but when I called the guy said for the back get Bridgestone Potenza 275/40/18's is that right?
Thanks,
-Gilbert
Thanks,
-Gilbert
09-14-2006, 06:23 PM
#4
Originally Posted by DOMINION
All show no go. Its a AT 8. So I should be ok with 275/40/18 ok cool.
Hey whats with the spedo?
Hey whats with the spedo?
well if you change the overall diameter of your tires your speedo wont be accurate anymore and you will need to get it recalibrated. or you could just get correctly sized tires?
and i think i read somwhere that a different diameter on the front and rear wheels will make the computer go nuts.
09-14-2006, 06:26 PM
#5
I don't buy Kool-Aid
Thread Starter
Also I was told by the rep that he can sell me after market tpms in stalled wheels and tires mounted and balanced
or
I can just have the ones in my stock wheels swaped out.
My question here is I have 16in wheels, will the tpm work in the 18in wheel and tires?
or
I can just have the ones in my stock wheels swaped out.
My question here is I have 16in wheels, will the tpm work in the 18in wheel and tires?
09-14-2006, 06:29 PM
#6
Originally Posted by DOMINION
Also I was told by the rep that he can sell me after market tpms in stalled wheels and tires mounted and balanced
or
I can just have the ones in my stock wheels swaped out.
My question here is I have 16in wheels, will the tpm work in the 18in wheel and tires?
or
I can just have the ones in my stock wheels swaped out.
My question here is I have 16in wheels, will the tpm work in the 18in wheel and tires?
dont know why it wouldnt. its just a pressure monitor that is stuck to the inside of the wheels right?
only think i could think of is if it is preformed to the diameter and not flexible? I would think if the guy at tire rack said they could be swapped out you probably shouldnt have much of a problem. I, however, have seen a few threads where people said their tpm's got damaged when they had new tires mounted.
How much extra do they want for the TPM's/mount/balance?
09-14-2006, 07:12 PM
#8
Originally Posted by DOMINION
OK on tirerack.com I'm looking at getting tires for 18x7 and 18x9's it shows Front: 225/45-18 and Rear: 245/40-18 but when I called the guy said for the back get Bridgestone Potenza 275/40/18's is that right?
Thanks,
-Gilbert
Thanks,
-Gilbert
18x7 225/40
18x9 255/35
09-18-2006, 04:18 PM
#13
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I have aftermaket wheels and didn't get TPMS installed. You'll have the light (unless you perform Mazda Maniac's DIY) but it doesn't really both me.
09-18-2006, 09:32 PM
#14
I don't buy Kool-Aid
Thread Starter
Thanks again guys. I asked my boy BigO, heres what I got:
OK on tirerack.com I'm looking at tires for 18x7 and 18x9's
It shows Front: 225/45-18 and Rear: 245/40-18 but when I called the guy told me: "For the back get Bridgestone Potenza 275/40/18's"
Is that right?
If anyone is running a after-market set-up please let me know what I can run on with out throwing my speed-odom off?
Thank you,
-Gilbert
People who work at tires shops... usually dont knowshit. That being said, when chosing tires for a rim,2 things...
1 - you want to tire to be wide enough for the rim
2 - you want to ensure that the side profile is pretty similar.
To address number 1 -
Anything from 255 to 285 will fit that rim. The wider you go the more grip you get, the more expensive the tire.
To address number 2 -
You need to learn how to calculate the side profile size.
Example...
255/40/18
Look at the first two numbers. In this case its 255/40. That means the side profile is 255 X .40 = 102mm
So on your proposed tire setup...
Your front profile is 225 X .45 = 101.25mm
Your rear profile is 245 X .40 = 98mm
A difference of 3.25mm... so not a big difference
The guy at TireRack.com suggested your rear profile be...
275 X .40 = 110mm
A difference of 8.75mm. Which is worse than what you suggested, and coincently 275/40 is a ver expensive tire.
HERES MY SUGGESTION:
on the rear get... 255/40/18. That is 102mm
Its also a cheap tire, and also a safe profile, and 255 will fit fine on your 9" rim.
Oh, and also... don't buy from tire rack. Edge racing is a much better site.
-hS
It shows Front: 225/45-18 and Rear: 245/40-18 but when I called the guy told me: "For the back get Bridgestone Potenza 275/40/18's"
Is that right?
If anyone is running a after-market set-up please let me know what I can run on with out throwing my speed-odom off?
Thank you,
-Gilbert
People who work at tires shops... usually dont knowshit. That being said, when chosing tires for a rim,2 things...
1 - you want to tire to be wide enough for the rim
2 - you want to ensure that the side profile is pretty similar.
To address number 1 -
Anything from 255 to 285 will fit that rim. The wider you go the more grip you get, the more expensive the tire.
To address number 2 -
You need to learn how to calculate the side profile size.
Example...
255/40/18
Look at the first two numbers. In this case its 255/40. That means the side profile is 255 X .40 = 102mm
So on your proposed tire setup...
Your front profile is 225 X .45 = 101.25mm
Your rear profile is 245 X .40 = 98mm
A difference of 3.25mm... so not a big difference
The guy at TireRack.com suggested your rear profile be...
275 X .40 = 110mm
A difference of 8.75mm. Which is worse than what you suggested, and coincently 275/40 is a ver expensive tire.
HERES MY SUGGESTION:
on the rear get... 255/40/18. That is 102mm
Its also a cheap tire, and also a safe profile, and 255 will fit fine on your 9" rim.
Oh, and also... don't buy from tire rack. Edge racing is a much better site.
-hS
09-18-2006, 10:30 PM
#15
i dont know about edge racing but there is nothing wrong with tire rack. they just dont ALWAYS have the absolute lowest price. But they do offer you the mounting and balancing of your wheels/tires and if it is free that is a GREAT deal and worth 80-100$ that you will have to spend to get them mounted and balanced. Factor that in to total cost if you are buying one of the components elsewhere. They are also a very reputable company that I havent heard much negative about their custom services. and finally, they offer a road hazard warranty which can be a pretty big deal to some people.
09-18-2006, 11:14 PM
#16
I don't buy Kool-Aid
Thread Starter
Oh dont get me wrong. But discounttire.com offers free mount and balancing with all wheel and tire bundles and edgracing along with a warranty for a small price.
I'm going after price and how fast they can ship to me before SS9. So I'm going with edgracing.
I'm going after price and how fast they can ship to me before SS9. So I'm going with edgracing.
09-19-2006, 08:59 AM
#17
I didnt check out edge so i didnt know they sold nor you were buying your entire package there. Yea if they give you the same services cheaper and can get it to you faster I would go there myself. I will have to keep them in mind next time I am in the market.
09-19-2006, 10:06 AM
#18
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Edge has a pretty good reputation on this board. A lot of members seem to have purchased from them and been happy with the results.
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