Tire size calculator

Dick:

To bad the calculator doesn't allow for inputting the original/former
coach tire size (e. g. 8.75R-16.5).

Paul Bartz

From: Richard Guthart [mailto:rguthart]
Sent: Sunday, September 13, 1998 10:19 AM
Subject: GMC: Tire size calculator

The recent discussion of tires reminded me of a useful little tire size
calculator on the web which makes it easy to compare different sizes and
aspect ratios. Thought I'd pass on the URL:
http://www.miata.net/garage/tirecalc.html

Dick Guthart
'77 Birchaven
 
Paul,

I agree.

If the original tire is a "78" profile then the diameter of the original
16.5" tire is 30.15" vs. 29.2874" for the 225/75R16's that we are now using.

>To bad the calculator doesn't allow for inputting the original/former
>coach tire size (e. g. 8.75R-16.5).
>
> Paul Bartz
>
>From: Richard Guthart [mailto:rguthart]
>Sent: Sunday, September 13, 1998 10:19 AM
>Subject: GMC: Tire size calculator
>
 
Dick:

Last year when I changed over to Alcoa wheels and purchased 16"
Bridgestone tires, the dealer told me the original or 8.75 R-16.5
Michelin XPS tire I had on the coach have an O.D. of 29.2" and the
225/75R-16 tire has an O.D. of 29.3", which correlates with your 29.2874
number below. Hence the 225/75 is a close fit for the original.

Paul Bartz

From: Richard Guthart [mailto:rguthart]
Sent: Monday, September 14, 1998 12:55 PM
Subject: Re: GMC: Tire size calculator

Paul,

I agree.

If the original tire is a "78" profile then the diameter of the original
16.5" tire is 30.15" vs. 29.2874" for the 225/75R16's that we are now
using.

To bad the calculator doesn't allow for inputting the original/former
coach tire size (e. g. 8.75R-16.5).

Paul Bartz

From: Richard Guthart [mailto:rguthart]
Sent: Sunday, September 13, 1998 10:19 AM
Subject: GMC: Tire size calculator
 
You must log in or register to reply here.
GMCMI Fall 2026 Rally
Get your shine on at www.cruzingear.co

Share this page

Share this page
Top Bottom
Back