Best Tire Size on 18' for comfortable Ride?
07-09-16, 07:42 AM
#2
My suggestion is that you go to www.tirerack.com to review tire sizes with manufacturer marketing descriptions along with customer comments for those tires. You have to take into compensation if you want to + or - size your tires for different characteristics as well. If you're just looking for a standard size 18 tire Bridgestone and Michelin have models at the top of the touring class but others (brands) have notable benefits as well.
...this is what I have running until i blew a tire out so I went back to my 19s (245/35-19). No rubbing.
07-11-16, 01:54 PM
#6
Instructor
I'm running 235/40-18 Michelin's (25.7"dia.) with a bit of a drop.
I choose that size for my 18's because it was the closest to the stock diameter of 25.4"
245/40-18 diameter will be 26.7" and your speedometer will be off by 5%
Incorrect, 245/40-18 diameter should be 25.7"
I choose that size for my 18's because it was the closest to the stock diameter of 25.4"
245/40-18 diameter will be 26.7" and your speedometer will be off by 5%
Incorrect, 245/40-18 diameter should be 25.7"
Last edited by FrankT; 07-12-16 at 11:08 AM.
07-11-16, 03:44 PM
#7
Code:
Specification Sidewall Radius Diameter Circumference Revs/Mile Difference 225/55-16 (OEM) 4.9in 12.9in 25.7in 80.9in 783 0.0% 235/45-17 (OEM) 4.2in 12.7in 25.3in 79.6in 796 -1.6% 245/40-18 3.9in 12.9in 25.7in 80.8in 784 -0.1%
Code:
Specification Sidewall Radius Diameter Circumference Revs/Mile Difference 235/45-18 4.2in 13.2in 26.3in 82.7in 766 2.3%
Code:
Specification Sidewall Radius Diameter Circumference Revs/Mile Difference 235/40-18 3.7in 12.7in 25.4in 79.8in 794 -1.3%
Also, there's a difference between a comfortable ride and a proper fit. The ride won't be as comfortable. You'll have more wheel and less sidewall. It's going to be harsher no matter what fitting tire size you get. However, you might also find that it's not a big enough difference for you to notice, especially if you're coming up from 17" instead of 16".
Last edited by 8M6; 07-11-16 at 04:14 PM.
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07-11-16, 04:42 PM
#8
Instructor
Tire size calculator https://www.rimsntires.com/specspro.jsp
Comfort wise 45 series tire would defiantly be better for comfort I do feel the road with those 40's.
Comfort wise 45 series tire would defiantly be better for comfort I do feel the road with those 40's.
Last edited by FrankT; 07-11-16 at 04:47 PM.
07-11-16, 11:03 PM
#9
Tire size calculator https://www.rimsntires.com/specspro.jsp
Comfort wise 45 series tire would defiantly be better for comfort I do feel the road with those 40's.
Comfort wise 45 series tire would defiantly be better for comfort I do feel the road with those 40's.
Just want to make sure the OP has the correct info to make a decision.
Last edited by 8M6; 07-11-16 at 11:37 PM.
07-12-16, 11:31 AM
#10
Instructor
Thanks for catching that; corrected. It makes the forums much better.
Well my 235/40-18 Michelin's are at 7/32 after almost two years, and I can tell you that's a great tire, very sporty feel. My GS is my commuter and a lively feel to the road is what I wanted. Will see if that changes after a 1,500 mile road trip, I leave tomorrow.
Well my 235/40-18 Michelin's are at 7/32 after almost two years, and I can tell you that's a great tire, very sporty feel. My GS is my commuter and a lively feel to the road is what I wanted. Will see if that changes after a 1,500 mile road trip, I leave tomorrow.
07-12-16, 04:05 PM
#11
I also chose 235/40 for my own car, the Bridgestone Potenza RE760. I don't find the ride to be harsher in a disruptive way. You will notice it, the first few times after changing over from stock, then it will be the new normal, with the benefit of better handling if you chose a decent tire. 245/40 is still an acceptable overall diameter, and will offer a ride closer to stock. This is what Tire Rack recommends and what a lot of tuners chose in Hyper Rev No.34. Many members here who have milder builds have also chosen 245/40.
07-13-16, 07:12 AM
#12
I am running 255/40/18 rears and 225/45/18 fronts on OEM IS350 10-spoke staggered rims.
I get compliments on the looks and I find the ride very comfortable. I am using older Michelin Sport A/S plus tires. I also have KYB shocks, L-tuned lowering springs and TRD sways.
I get compliments on the looks and I find the ride very comfortable. I am using older Michelin Sport A/S plus tires. I also have KYB shocks, L-tuned lowering springs and TRD sways.
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