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[testdriver]

With not that many tyres size to choose on AD08R, what would be the best choice for 18 inches?
Suspension: KW V3
wheels size: 18x9.5 et22 / 18x10.5 et22

245/40-18

255/35-18
255/40-18

265/35-18
265/40-18

285/30-18

295/30-18


Beside 245/40 & 265/40 .... what is the next best size if I want to go wider tires since I have 9.5/ 10.5 width wheels?

Thank you for your common/ advise.

[VictorH]

I can't give you any specific advice as to those specific sizes but I can tell you based on the 19" sizes I purchased is that the AD-08R tends to run significantly wider than Michelin or Bridgestone so be careful with fitment, i.e. possibility of rubbing.

[testdriver]

I'm consider 255/35-18 & 285/30-18......but

255 is 0.7 inch less than stock & 285 is 1.6 inch less .... more importantly is the rear has shorter diameter than the front, which is the opposite from stock.

If Yoko is wider than other brand like Michelin, will 285/30 or 295/30-18 hit my rear fender as I will lower the car with KW-V3?

Really want to know what size & the results of those who is using AD08R...

[VictorH]

The rear is where I had my problem. Went from Bridgestone RE-11 in 275/35/19 to Yokohama AD-08R in same size and it's much wider and rubbed on my driver's side rear after the change. Had to raise the car 1/4" on that side (not optimal but had no choice) which helped but it's still going to be a problem on the track.

[slicer]

Ad08's aren't available in good 18" M3 sizing. Most run 265/35/18 front and 295/30/19 rear. The problem is that 295/30/18 is a full 1" smaller diameter than OEM. I would choose a different tire brand that is available in 285/35/18. My favorite 18" tire sizes are 275/35/18 and 295/35/18. Unfortunately you're Volk wheels are too aggressive for 295/35/18's. I chose 275/35/18 and 285/35/18 Hankook RS3's when I had Volks.

[testdriver]

Lots of ppl say AD08R is wider than most other brand.... what do think if I use 245/40 & 265/40-18 AD08R on 9.5/ 10.5 inch?

Thanks

[slicer]

Originally Posted by testdriver

Lots of ppl say AD08R is wider than most other brand.... what do think if I use 245/40 & 265/40-18 AD08R on 9.5/ 10.5 inch?

Thanks

That will work. It will be a little stretched... I wouldn't go that route. Are you not willing to consider other tires? What is purpose of wheels? Street only? Track? Both?

Michelin PSS would be a good street option and it's available in 265/275/285-35-18 sizing

[testdriver]

Mostly for street but I will goto track day..... here in Asia, track temp in spring time can easy reach 30C above (summer time is even worst). Therefore, PSS may not be the best choice in that case. RS3 may be good, but the tyre shop here actually dont carry it....

I'm wonder how bad will that be if using 295/30/18 which is a full 1" smaller diameter than OEM.... and being shorter than the front tyre in diameter

[slicer]

I personally don't see the point of buying 18" wheels and then buying tire sizes appropriate for 19" wheels (sidewall height). You might as well get 19's...

[Richbot]

Nothing wrong with the 295/30-18 on the rear of an m3, especially paired with the 265/35 up front. I've used that size before in competition and was not killed. A little better gearing and a little worse forward bite than the taller tire I normally ran in the rear, but the ad08 is so much better than most street tires it would still be a big improvement over PSS for track use. It will not ruin the car. Tire size is not near as critical as it is sometimes made out to be, if it could ruin a car's handling all by itself we'd all be greasy smears on the side of a tree as soon as we took the first turn with a square setup...

Is the BFG Rival available there?

[testdriver]

You have a good point..... you just remind me by using Sq set up as an example of we don't always have to keep or closely follow the "factory set up".

Thank you

[slicer]

Originally Posted by Richbot

Nothing wrong with the 295/30-18 on the rear of an m3, especially paired with the 265/35 up front. I've used that size before in competition and was not killed. A little better gearing and a little worse forward bite than the taller tire I normally ran in the rear, but the ad08 is so much better than most street tires it would still be a big improvement over PSS for track use. It will not ruin the car. Tire size is not near as critical as it is sometimes made out to be, if it could ruin a car's handling all by itself we'd all be greasy smears on the side of a tree as soon as we took the first turn with a square setup...

Is the BFG Rival available there?

Despite my opinion posted above, I do agree with this ^. The car should not have problems with the 265/295 setup. I just go back to the question - Why get 18's and turn around and install a low profile tire in a size appropriate for a 19" wheel? At least if you were running 19" AD08's you could get a 275 in the front (yokohama doesn't make a 275 in 18"). I would consider the 265/35/18, 295/30/18 tire sizes for R-comp tires that don't have any other options (Hankook TD, Michelin PSC...).

[radiantm3]

Originally Posted by slicer

Despite my opinion posted above, I do agree with this ^. The car should not have problems with the 265/295 setup. I just go back to the question - Why get 18's and turn around and install a low profile tire in a size appropriate for a 19" wheel? At least if you were running 19" AD08's you could get a 275 in the front (yokohama doesn't make a 275 in 18"). I would consider the 265/35/18, 295/30/18 tire sizes for R-comp tires that don't have any other options (Hankook TD, Michelin PSC...).

I've been running the 265, 295/30/18 setup for 4 years with a variety of street and r-comp tires with no issues at all. I don't really see the problem. I don't own a set of 19" wheels.