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[usa-69z]

Awsum info Steve ,you have nailed pretty much everything there. I thank you.
I have just ordered some billet 3 piece rims (yesterday) and started to get a bit anxious on wether i did get the right combo. Just in case i had to make a qwik call to change things.
Im running the tried and tested 17 x 9.5 with 275 rears now, But im wanting bigger. ..i will stik with the 275 tyre though.
Im gunna try the g-force Kd goodrich tyres this time too.

Gav

[buickfunnycar.com]

Originally Posted by usa-69z

Awsum info Steve ,you have nailed pretty much everything there. I thank you.
I have just ordered some billet 3 piece rims (yesterday) and started to get a bit anxious on wether i did get the right combo. Just in case i had to make a qwik call to change things.
Im running the tried and tested 17 x 9.5 with 275 rears now, But im wanting bigger. ..i will stik with the 275 tyre though.
Im gunna try the g-force Kd goodrich tyres this time too.

Gav

A 245/45 or 245/40 front with a 275/40 rear should be just about perfect on those wheels Gav...

[usa-69z]

Originally Posted by musclecarjohn

A 245/45 or 245/40 front with a 275/40 rear should be just about perfect on those wheels Gav...

yer all champions !!

[Steve Chryssos]

Originally Posted by usa-69z

...Im running the tried and tested 17 x 9.5 with 275 rears now, But im wanting bigger. ..i will stik with the 275 tyre though.
Im gunna try the g-force Kd goodrich tyres this time too.

Gav

Well that's great news because you can use your existing combination to really get in there and measure clearances all the way around. With that info in hand, you might squeeze a 285

[usa-69z]

Originally Posted by streetfytr68

Well that's great news because you can use your existing combination to really get in there and measure clearances all the way around. With that info in hand, you might squeeze a 285

Gee Steve , i may be pushing my luck with that... ive seen a 285 with a 9.5 rim but neva a 10incha with 285 sqeezed in

[Steve Chryssos]

I'm a bad influence. On a 67/68, a 285 absolutely, positively fits if you follow all of the custom backspacing tips and roll the wheel lips. 69's are easier since there is even more room. 285mm converts to 11.22" inches. I just measured a 69here at the shop and came up with just over 12" of clearance at the tightest point. That is at roughly 11 o'clock when facing the wheel. In my case, the lips have been rolled and painted with black 3M body Schutz paint.

[Rybar]

How low your car sits and the stiffness of your rear suspension will make a difference if you can fit them in without rubbing.

I think the sizes you ordered will be fine with a 275-40-18 rear tire.