Wheel / Tyre Size Combinations & Speedometer Readings

[s5tvr]

I'm looking at which front and rear wheel and tyre size combinations would have the least impact on the speedometer reading of my car (T350c). Am I right in thinking that this impact needs only to be minimised on the set of wheels (front or rear) that the road speed is measured from, or do you need to minimise the impact on both the front and rear wheels ?.

Also, what wheel/tyre size cominations are other people running on their T350's, Tamora's, Tuscans etc ?.

[mad mitch]

Go to the google home page and search under ` MIATA` lok down to about 4th and youll see tyre size calculator. It is obvious how to use it once in.
Hope this helps.
Mitch.

[BossCerbera]

Speedo is working from the rear wheels on TVRs.

You can run up to 265/35 18 on a T350 without making your speedo under-read.

[V8Smith]

Try this, it will tell you what sizes wont affect your speedo and if they do by how much.

www.miata.net/garage/tirecalc.html

Later

Mike

[s5tvr]

BossCerbera said:

Speedo is working from the rear wheels on TVRs.

You can run up to 265/35 18 on a T350 without making your speedo under-read.

What are peoples thoughts on this size of tyre on the rear in terms of handling & grip etc ?