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245/35/18...?

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Old 01-04-2009, 08:04 PM
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245/35/18...?

stock tire size: 225/45/18, diameter = 26.0 inches
my current tire size: 245/40/18, diameter = 25.7 inches
tire size i want: 245/35/18, diameter = 24.8 inches

my current tire is a little more sidewall then i was hoping to have when i got these tires a few years ago. i'm down to about 3/32 and my inspection is due in february, so i'm starting to research tires in case they don't pass me with the condition of my tires now. even if they do, i'll need new tires soon i guess. i wanted to save up for new rims by now, but haven't so i'll be keeping the stock wheels.

so...anyway...besides a rougher ride, i'd like to get 245/35/18 for my next tires. would they be too low profile? i have tein s springs, just ordered konis so i'll have them on by the time i get tires...

my concern is the size of the fender gap (it's perfect now, but i'd be "losing" an inch of tire. so will the whole car drop that .9 inches (resulting in me scraping the speedbumps in my apartment!!) or will there be a .9 inch bigger gap in the tire/fender?? is this a dumb question?

as a point of reference in case not many people have tein s w/ this exact tire set-up, here are some similar diameter set-ups to the potential of 24.8 inches...

255/30/19 (25.0 inches)
255/35/18 (25.0 inches)
265/30/18//19 (24.3 inches//25.3 inches)
Old 01-04-2009, 08:38 PM
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Lots of people run a 35 sidewall and have no problems. Your wheel gap will increase a tiny bit, and you will be a bit lower to the ground.
Old 01-04-2009, 08:49 PM
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^ thanks. i know a lot of people run a 35 sidewall, but it depends on the width. i was wondering if anyone ran a 245/35. also, i think a lot of people that run 35 are running 19's too. could be wrong, just seems like that's what i've noticed.
Old 01-04-2009, 09:38 PM
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carefull.... if you go to low and you take a corner hard enough you might "roll" onto your rim
Old 01-04-2009, 10:10 PM
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Have not run the 245/35-18. But I do run the 265/35 which is fine with me. Speedo is off by about 4 mph (low) at 75 mph
Old 01-07-2009, 12:14 AM
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thanks guys. i'll probably go for it then when the time comes. i'll take before and after pics to see if it's noticeable.
Old 01-07-2009, 01:07 AM
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Originally Posted by risky business
carefull.... if you go to low and you take a corner hard enough you might "roll" onto your rim
considering that ullloooosseee races 245/35/18 tires i dont think thats a problem. he has won the b-stock championship for several years now. if that was a serious issue, he would have done it by now.

i wouldnt go below a 35 though.

also, a 225/35 has a smaller sidewall than a 245/35.
Old 01-07-2009, 07:20 PM
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going from a 40 series to 35 series is only 5mm not that big of a gap will b seen
Old 01-08-2009, 02:31 AM
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sure you can do it,

but why?

you dont seem to be doing track days, or auto x.

your are going to gain worse gas mileage and really off speedo.

btw, the stock 225 /45 / 18 are 25.9"

the only logic would be track or auto x.. but what is the point?

beers
Old 01-08-2009, 05:28 AM
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I hope All the roads that you drive on are nice and smooth. You are loosing sidewall that can help protect the rim when you hit a pot hole.
Old 01-08-2009, 09:28 AM
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Originally Posted by 04RX8man
going from a 40 series to 35 series is only 5mm not that big of a gap will b seen
it's about .9 inches different; it's a percentage of the width, but i agree, it shouldn't be that noticeable.
Old 01-08-2009, 09:32 AM
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Originally Posted by swoope
sure you can do it,

but why?

you dont seem to be doing track days, or auto x.

your are going to gain worse gas mileage and really off speedo.

btw, the stock 225 /45 / 18 are 25.9"

the only logic would be track or auto x.. but what is the point?

beers

how is the only logic track or auto x? i don't like the look of the bigger sidewall that i have now. i just like the look of lower profile tires. and they are cheaper, at least the brand that i'm looking into. and they should weigh a pound or two less...
Old 01-08-2009, 09:33 AM
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Originally Posted by alnielsen
I hope All the roads that you drive on are nice and smooth. You are loosing sidewall that can help protect the rim when you hit a pot hole.
where i drive they're fine. some roads in texas are terrible, but austin, at least where i am, is fine. i just have stock rims that already have a bit of curb rash anyway!


sorry...i don't know how to multi-quote...
Old 01-08-2009, 02:12 PM
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yeah mine are 255/35/19 and I love the look of the lo pro tires... I'm just not sure if its right with 18's? Seems like you would see a lot more wheel/fender gap
Old 01-08-2009, 02:50 PM
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Originally Posted by Ross_Dawg
yeah mine are 255/35/19 and I love the look of the lo pro tires... I'm just not sure if its right with 18's? Seems like you would see a lot more wheel/fender gap
yeah, that's what i'm worried about. i have tein s drop though. do you have a drop w/ your set-up? maybe a tire shop would be willing to put some on to see if i promise to buy the tires from them!! ha ha
Old 01-08-2009, 03:06 PM
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Originally Posted by 2tone
sorry...i don't know how to multi-quote...
Buy the box that says Quote, there is a box that has "+. Click on that for all the posts you want to quote in your next reply.
Old 01-08-2009, 03:14 PM
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Originally Posted by Ross_Dawg
yeah mine are 255/35/19 and I love the look of the lo pro tires... I'm just not sure if its right with 18's? Seems like you would see a lot more wheel/fender gap
Originally Posted by 2tone
yeah, that's what i'm worried about. i have tein s drop though. do you have a drop w/ your set-up? maybe a tire shop would be willing to put some on to see if i promise to buy the tires from them!! ha ha
Originally Posted by alnielsen
Buy the box that says Quote, there is a box that has "+. Click on that for all the posts you want to quote in your next reply.

ha ha, wow i swear i've tried that before and it didn't work! maybe my mac at home can't do it? either way, thanks for the tip alnielsen
Old 01-08-2009, 04:20 PM
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yeah I have Tein S-techs on stock struts and I wished they went a lttle lower; so my bet is you'd still have some wheelgap even with the lowering springs
Old 01-08-2009, 04:29 PM
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Originally Posted by Ross_Dawg
yeah I have Tein S-techs on stock struts and I wished they went a lttle lower; so my bet is you'd still have some wheelgap even with the lowering springs
hmm, i hope not. it's about an inch total between my current sidewall and the new one, i just don't know if that will all translate to the fender gap. i still have a while, so maybe at some point i can get discount tire to throw them on for me to see. i just order konis, but i don't think that will make it any lower...
Old 01-08-2009, 04:37 PM
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You want fender gap.... 245-35-18 with stock springs.
Old 01-13-2009, 11:48 AM
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Hey ULLLOSE are 19's allowed in BS?
Old 01-13-2009, 11:53 AM
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^I don't think so.
Old 01-13-2009, 11:54 AM
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Originally Posted by Ross_Dawg
Hey ULLLOSE are 19's allowed in BS?
Only on an R3. In stock class wheel width and diameter must be stock for your year and model. The only change you are allowed is +/- 1/4" offset allowance, this allows a lot of the aftermarket wheels that don't have our 50mm offset legal.
Old 01-13-2009, 12:16 PM
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As ULLLOSE cites, you want some fender gap. We're discussing an integral component of the vehicle's suspension system after all. Unless you always drive on super smooth roads, you've got to have some room to absorb what the road will throw at you, especially if you lower your '8.
Old 01-13-2009, 02:21 PM
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Originally Posted by ULLLOSE
Only on an R3. In stock class wheel width and diameter must be stock for your year and model. The only change you are allowed is +/- 1/4" offset allowance, this allows a lot of the aftermarket wheels that don't have our 50mm offset legal.
that's what I thought. Last season I ran 2 BS days and no problems; but I think if I get serious and into points and everything I'll have to change to OSP? Or is there another class I can run that's not quite as broad as OSP?


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