What's the better tire/wheel combo?

Thomas Edinger · Post by **Thomas Edinger** » Wed Mar 25, 2009 3:06 pm

A. 18lb 16x7.5" wheel and 19lb V710 215/40/16 with 8.5" tread width with a 1lb wheel spacer (.25" thick). Overall weight: 38

B. 20lb 15x8" wheel and 24lb V710 225/50/15 with 9.0" tread width. Overall weight: 44

C. 20lb 15x8" wheel and 20lb A6 225/50/15 with 8.8" tread width. Overall weight: 40

D. 20lb 15x8" wheel and 20lb A6 225/45/15 with 8.8" tread width. Overall weight: 40

Assuming any change in gearing due to tire diameter is acceptable.

Mako Koiwai · Post by **Mako Koiwai** » Wed Mar 25, 2009 3:20 pm

For What Type Of Car ... which class ...

John Coffey · Post by **John Coffey** » Wed Mar 25, 2009 3:38 pm

How long is a piece of string?

Jason Isley BS RX8 · Post by **Jason Isley BS RX8** » Wed Mar 25, 2009 3:44 pm

18X13 with a 345.

Steve Ekstrand · Post by **Steve Ekstrand** » Wed Mar 25, 2009 3:46 pm

How will the gearing effct help or hurt you?

And damn.... Can't you find lighter wheels?

Mako Koiwai · Post by **Mako Koiwai** » Wed Mar 25, 2009 3:48 pm

Handy wheel/tire size calculator:

http://www.miata.net/garage/tirecalc.html

Thomas Edinger · Post by **Thomas Edinger** » Wed Mar 25, 2009 3:55 pm

I'm looking for the best combination of contact patch / weight / compound / speed.

Post by **Marshall Grice** » Wed Mar 25, 2009 4:04 pm

D. is the correct answer.

...what do I win?

Jason Isley BS RX8 · Post by **Jason Isley BS RX8** » Wed Mar 25, 2009 4:34 pm

Thomas Edinger wrote:I'm looking for the best combination of contact patch / weight / compound / speed.

I would say E. 15X8 with a 275/15 A6.

Michael Wood · Post by **Michael Wood** » Wed Mar 25, 2009 4:50 pm

Marshall Grice wrote:D. is the correct answer.

...what do I win?

I'm with Marshall... "D" gives the most advantageous moment of inertia, all other variables being equal.

Don Salyers · Post by **Don Salyers** » Thu Mar 26, 2009 8:12 am

Jason Isley BS RX8 wrote:
Thomas Edinger wrote:I'm looking for the best combination of contact patch / weight / compound / speed.
I would say E. 15X8 with a 275/15 A6.

Jason is right!
Don

Andrew Bingham · Post by **Andrew Bingham** » Mon Mar 30, 2009 10:53 pm

949Racing makes rims in the 15x8 size that weigh like.... 12.7lbs... For $159 a pop.

I think you should be looking at lighter rims.

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What's the better tire/wheel combo?

What's the better tire/wheel combo?

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