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nsta

Thinking to go back to stock S15 rim with 235rwkw.....possible?

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Thanks for the heads up.

 

Current have

 

18x9.5+18 Rear

18x8.5+18 Fronts

 

Which tyre combo is best for me. After reading the forums and the carbible it seems

 

255/35/18

235/40/18 or 245/45/18 is the way to go?

 

My current is 255/35/18 rear and 225/40/18 front (I have coilover so maybe 225 is safer on the wider front rim?

 

If I stretch tyres I assume I lose some contact path thus don't get as much traction?

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My current is 255/35/18 rear and 225/40/18 front (I have coilover so maybe 225 is safer on the wider front rim?

 

those size tires are closest to stock rolling diameter in 18's - ie. have the least amount of speedo difference.

 

just take a pic of your rim vs coilover on full lock and see what case if worse. if miles away then go a 235 if your worried about stretch?

 

i have 225 on 8.5" rim, no problems what so ever :)

Edited by Scotties15

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The ideal tyre sizes for those sized rims would be -

 

265/35/18 rears &

245/35/18 fronts

 

But going back to your first post you said the 255 / 18x9.5 +18 rears scraped your coilovers... I'm assuming that's because your running a massive amount of negative camber to get them under the guards? If so your quest for grip is going to be handicapped by the size/offset of your rear wheels.

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Yeah you're right...i guess i have about 5mm clearance between geaud and tyre when the car is lowered, which maybe enough to clear the coilovers with added spares but i can't be certain. Would adding 265's to my rears make them even more likely to hit the coil overs, or is my offset more to blame for this.

 

P>S i dont think Advan make the AD08s in a 245/35/18, they do a 245/40/18 though :)

 

I'm hoping to purchase while the deal is still on!

Edited by nsta

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Well if your current setup fouls on the suspension you would want to downsize to avoid that. Mostly because Advan AD08s are wider than most tyres and their 245 for example might be close tread width wise as your current 255s, giving you the same clearance issues..

 

Since you said you weren’t a fan of the rims, wouldn’t it make sense to get new rims that fit with your hopes of getting traction in first gear. Otherwise just flare those rear guards and get the 265s.

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Worth mentioning that wider tyres with lower profiles are supposed to actually be somewhat worse for straight-line traction to a certain extent. Reason being that the tyre's contact patch doesn't actually get larger when going to wider tyres - it just gets longer laterally and shorter longitudinally. This aids cornering to a certain extent, with a corresponding minor loss in straight line traction. And of course, for track work, allows the tyre to be worked harder without heating up as much, hence why you start needing more rubber on the rear with increases in power, and on all 4 with the addition of aero bits and bobs.

 

The other factor potentially worth consideration is that lower profile tyres are less comfy and wider tyres are more likely to hydroplane in wet conditions.

 

So basically, physics tells us to prioritise compound 1st for street applications, and also that drag cars need *tall* tyres to maximise straight line traction (just look at top fuel cars). Soft semis in 205 will shit on ordinary tyres in 255 or even 305 for straight line pulls. Track work is another matter entirely.

Edited by Skepticism

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Thanks guys, i had a good think about this and more than likely will get a set of 205/55/16 AD08's all round and go back to stock s15 rims for now. I'm hoping the AD08s will be good for my requirements as the are a soft compound tyre! Also the AD08s are on special atm @ buy 3 get one free which is ending in one day or so! Will probably sell the rims that came with the car and look to purchase another set when a good deal comes by :)

Edited by nsta

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Thanks guys, i had a good think about this and more than likely will get a set of 205/55/16 AD08's all round and go back to stock s15 rims for now. I'm hoping the AD08s will be good for my requirements as the are a soft compound tyre! Also the AD08s are on special atm @ buy 3 get one free which is ending in one day or so! Will probably sell the rims that came with the car and look to purchase another set when a good deal comes by smile.png

 

cool. make sure to come back and post results. vids preferably :P

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