IS - 2nd Gen (2006-2013) Discussion about the 2006+ model IS models

20 inch rim tire recommendation

Old 07-09-14, 08:48 PM
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PawnStar23
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Default 20 inch rim tire recommendation

I've been searching for hours and hopefully someone can help me. I plan on to purchase some rims this weekend. They are 20x9 +38 in the front and 20x10.5 +45 in the rear. The current tires on them are 245/30/20 and 275/30/20. I have a is350 and will be lowered on H&R springs: 1.4 front and 1.3 rear drop. I'm trying to avoid cutting or rolling my fenders. I know the rear tires will be ok. I just want to know will I be ok with 245 in the front. Ive read some threads that some cars were running that size. So what are my options?

245/30/20

235/30/20

225/35/20

225/30/20: Im not sure if I want to run this size because the roads here in NY suck
Old 07-09-14, 09:00 PM
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Sffd103
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I ran 20's and had 225/30/20 and 255/30/20. When I had 19's I had 235/35/19 and 275/30/19. I had my fronts and rears rolled and fender tab relocated (after 20's). I was really low on coils though. Not sure how the rears will fit without and wok in the back and I really don't think the 245 will work at all. Hope this helps.

Last edited by Sffd103; 07-10-14 at 02:37 PM.
Old 07-10-14, 12:14 PM
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jay90011
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Unless you roll the fenders in the rear you will be rubbing the tire against the inner fender closer to the rear doors.I was running similar set-up in the rear with an offset of +30 and ended up going with a 255/30/20 which eliminated the tire rubbing on the fender. Though i had already rolled my fenders before changing the tire size.

For the fronts my offset is closer to yours which is +35 and i am on a 235/30/20 tire with no rubbing issues against the fender. I did have to heat the fender liner and relocate the fender tab.

Hope it helps
Old 07-11-14, 03:17 PM
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PawnStar23
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thanks for the replies. any thoughts 225/35/20 vs. 235/30/20 ?
Old 07-12-14, 12:05 PM
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Sffd103
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Originally Posted by PawnStar23
thanks for the replies. any thoughts 225/35/20 vs. 235/30/20 ?
If recommend the 225/30/20. You're gone need the most room in there as you can. Especially if you go low. You'll have to trust me on this one.
Old 07-13-14, 02:14 AM
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For sure stick with a 30 series tire. Depending on how low you are planning to go stick with a 225/30/20 for max clearence. If you are planing a one finger gap in the front you should be able to run 235/30/20 with no problems.
Old 07-13-14, 08:31 AM
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Sffd103
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Here is a link to the cars with 20's. I'm in there somewhere and was the lowest on 20's. go with the 225/30/20.
https://www.clublexus.com/forums/is-...s-allowed.html
Old 07-16-14, 07:13 AM
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ok I ended up ordering 225/30/20 and they should be here tomorrow. Or was I better off getting 235/30/20? since Im running 275/30/20 ? in the rear. I wanted a thicker sidewall for the roads but I guess I'll have to be careful when driving. btw my front rim is 20x9 + 38
Old 04-24-17, 06:24 PM
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Originally Posted by PawnStar23
ok I ended up ordering 225/30/20 and they should be here tomorrow. Or was I better off getting 235/30/20? since Im running 275/30/20 ? in the rear. I wanted a thicker sidewall for the roads but I guess I'll have to be careful when driving. btw my front rim is 20x9 + 38
how did it turn out?
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