Ok so I bought some rims last week 18"x7.5 offset 42. I was planning on putting some 215/35 tires on them. So I was at the local dealership the other day and I saw in their showroom an xb with 18" with 215/40 tires. Does anyone out there have this size? Cause I was thinking with a little bit more meat it might be a softer ride.

thanks
scion619

you will get a little better ride. i had a 35 series tire and i plan to go with a 40 next time

so 40 series should fit right? Just wondering if there is going to be any rubbing issues?

you should be fine even with being lowered 2". are you lowered?

I'm running 225/40/18 and it still fits :P

35's looks too skinny to me... 215/40/18 should be fine

-THE DON

right now im not lowered but I was planning on just lowering maybe 2 inches but not sure though cause I don't want to sacrifice the comfort. maybe 1" to 1.5?

so 40 series should fit right? Just wondering if there is going to be any rubbing issues?

no problemos

I ran the df210 springs thats like a 2.5 drop and the same tire size with no problems

the ride is nice. my offset is much lower than yours so i have a tiny bit of rubbing. +42 should be fine on a 7.5 wheel for 215/40s. IMO 215/35 is too thin. On my next set of tires, I might try 205/40/18s to avoid the rub and git some stretch.

I'm running 225/40/18 and it still fits :P

35's looks too skinny to me... 215/40/18 should be fine

-THE DON
?
hey the don what wheels are you running and what offset? Any pics
-Ryan

the 215/35/18 will out handle the 205/40/18 due to the shorter tire which is close to OE overall diameter the 205/40 is taller

Ok so Im confused :shock: I thought that I have read in other post that a 40 series tire and 18's are asking for rubbing. If this is not the case I got to get some 18"s :D

i am running 18 x 8" with 215/40/18"s ,lowered almost 2"s. only problem i have is that the tire rubes just a little on the lower inner raised part of the fender well in front.and thats only when i turn the wheel almost full radius. very minor issue. overall i'm happy with the ride. you can see the differance from my lava and my thunder cloud.

http://img187.exs.cx/img187/8553/p10100099tu.th.jpg (http://img187.exs.cx/my.php?loc=img187&image=p10100099tu.jpg)



http://img187.exs.cx/img187/3393/p10100229vr.th.jpg (http://img187.exs.cx/my.php?loc=img187&image=p10100229vr.jpg)

http://img187.exs.cx/img187/2613/p10100130uj.th.jpg (http://img187.exs.cx/my.php?loc=img187&image=p10100130uj.jpg)

a 40 series 215 is about 1" in total diameter bigger than a 35 series 205

the rolling diameter of the 215/40-18 is 24.771"
the rolling diameter of the 205/35-18 is 23.649"


I covered the formulas for this last July at http://www.scionlife.com/forums/viewtopic.php?t=19301&highlight=rolling+diameter+formula if you need to review it shopping for tires.

I am rolling on Falken Ziex ZE-512 tires in size 215/40zr/18 (thanks to toast3r). The wheels are 18x7.5". It rides pretty good and fills in the gap slightly more than 215/35s. My ride is dropped on Tanabe DF-210s.

http://www.scionlife.com/gallery/data/500/9796127_2741.JPG

http://www.scionlife.com/gallery/data/500/9796127_2742.JPG

Ok looks as though Im going for 215/40 tires!!! Does anyone recommend a particular brand? Im on a tight budget but don't want anything cheap or to expensive...


thanks
scion619

bump

Ok going with 215/40 18x7.5 42 offset with trd springs..... anybody out there got this set up? if so please post some pics!!!

thnks
scion619

Won't 40s throw of your speedo. I have 215/35's on my xA, and was told by the tire guys not to go with the 40's cuz they will rub and throw off the spedo.

a 215 40 will set off the speedo by 2.3% too slow meaning when your speedo reads 60 you will be going 61.4.

I got it here
http://www.miata.net/garage/tirecalc.html

Won't 40s throw of your speedo. I have 215/35's on my xA, and was told by the tire guys not to go with the 40's cuz they will rub and throw off the spedo.

I have 215/40s and they don't rub at all even with my Tanabe DF210 drop.

I knew it! Those bastards!
Next time I'm getting 40's for sure. Thanks guys.

I hear a lot of peeps with damaged rims running on 35's how come we don't hear to much people running on 215/40's. Is it just cause the size is rare?
Or they think they will rub?




lates
scion619

selection or lack there of in tires. They list 4 or 5 tires on tire rack for that size. But i am deffinately running a 215/40 to save my wheels.

bump

I've got 18x7.5's with 215/35 and now wish I had gone to 40's as well - I'll change them eventually. Go to: http://www.discounttiredirect.com/direct/brochure/info/tmpInfoTireMath.jsp
and you can calculate any differences in speedo, size, etc.. in a snap!

Cheers!

David - :clap:

just got my 215/40 18"s yesterday... very smooth ride im so glade i got this size....

Good choice! Let's see some pics.