Which Tyre Size?

[Guest]

Hi everyone. Ive just bought a set of 16 inch AC Schnitzer rims. Im wondering what tyre size would be most suitable for the E30?

205 45 16

or

205 50 16

Thanks.

[buster]

the 205 50 16.

compared to the standard 15" bbs wheel.(205 55 15)

205 50 16;
Speedometer Difference: 0.833% too slow Diameter Difference: 0.84%

205 45 16;
Speedometer Difference: 2.628% too fast Diameter Difference: 2.56%

Personally,id use neither and go for a 225 45 16 which is closer and will look better.

225 45 16;
Speedometer Difference: 0.414% too slow Diameter Difference: 0.42%

It is recomended to stay within 3% of the original diameter

[Guest]

Phew, now that's a detailed reply! Thanks for the information, much appreciated!

[buster]

no problem bud.The zone is here to help where its members can.

[Lordschleife]

You want to pay attention to the speed and load index too

[320Touring]

seeing as how you guys are being so helpful...

do i want to get 195/50/15s on my bbs, or 205/50/15s?

or would you recommend a higher profile?

Cheers

320Touring

[Lordschleife]

Well I was going to get some 50 profile tyres for the iS, but I was put off as the load index on them tends to be 82 instead of the 87-88 that the higher profile tyres have.
Probably be OK as long as you dont carry too much weight? Anyone?

[Lordschleife]

BTW tyre size calculator - v. handy
http://www.miata.net/garage/tirecalc.html

[320Touring]

Well I was going to get some 50 profile tyres for the iS, but I was put off as the load index on them tends to be 82 instead of the 87-88 that the higher profile tyres have.
Probably be OK as long as you dont carry too much weight? Anyone?

@the not carry too much weight! just my fatt ass

thanks for tyre size calc

[Simon13]

i wouldn't go 225's on the front aussie matey Ant tried it and said it twas pants my lord

320 touring, i would stick to 205 width as you have a nice 6 pot

[320Touring]

thanks simon, but the 195's i have on the front rub at full lock left-

any ideas why?

thats why i was thinking no bigger than 195 (plus caskill were doing 4x toyo t1-s at 195/50/15 for Ԛ£129 delivered )

[Simon13]

are your wheels genuine bbs's? they can't rub badly surely? mine don't on my sport with 15 bbs or 16 alpina's

ask demlotcrew about 195's on 15's he has them on his but with a lighter 4 pot engine it actually helps him a bit.

[320Touring]

me is thinking that the plastic liner in the front right arch is a bit low, or in too far (too near to the wheel) yup they're gen BBS (right down to the centrecaps (stamped BBS!)

only happens on full lock left!Nothing on full lock right, so thats what makes me think its the liner?!

[Simon13]

probably a lose splash guard where the brake duct is? just a guess. My Alpina's just brush those when they are on full lock.

Has it been in a shunt do you know?