Talk:Tire code

Yes, merge. (or possibly delete the other page) I started the other one because I can spell tyre properly ;-) this one needs an English spelling reference too MikesPlant 14:46, 17 April 2006 (UTC)

155/SR13?

Can anyone tell me what a 155/SR13 tire is? No one around where I live has heard of one. My 88 Corolla needs a set of front tires and 155/SR13 is the stock sizing. Would a 155/80-13 work? 156.34.156.212 21:34, 27 October 2006 (UTC)

Well, if the number after the slash is omitted, it's generally assumed to be 82% - so yeah - I'd expect a 155/80 to be just fine. I don't know what the 'S' is all about though. SteveBaker 22:43, 27 October 2006 (UTC)

I have a vague memory that 'S' in that position means the "standard" 82%, but don't have a source offhand.

S is the speed rating of the tyre

—The preceding unsigned comment was added by 219.89.129.194 (talk) 09:58, 11 April 2007 (UTC).

215/70TR15

what does the TR stand for?--137.146.145.134 00:05, 28 January 2007 (UTC)

T is the speed rating of the Tyre

Special Trailer (ST) codes

What are "special trailer" tires? --Una Smith 02:09, 4 November 2007 (UTC)

They are... special tires for trailers!

Seriously, they are typically bias ply tires with stiffer sidewalls to reduce sway. They're often more expensive but tougher than passenger or light truck tires, since trailers usually don't have the sophisticated suspension systems used on cars or trucks. Captain Packrat (talk) 18:59, 2 January 2008 (UTC)

Tractor Tire Sizes?

Is there an explanation of tractor tire sizes anywhere? They are normally in the format 14.9-24 or 6.50-16

I suppose the second number is the size of the rim. but I don't know what the first number represents.

I'm trying to find options for the front wheels on my tractor, the current tires just don't work for me. They are a 3 rib design, and the problem is, they dig into the ground too much, and I get stuck very easy, especially with anything in my loader. I notice that cars, trucks, and my van... even cement trucks never get stuck, and they all have wider, flat tires, so I'm thinking if I can get a wider car or truck tire to fit on my tractor rims, I would have more surface area to hold up my tractor and it wouldn't dig the front wheels in so much. The tires on there are 6.50 - 16 but they could be a bit wider. If I could understand the size I have, maybe I could find something else that would work.

Jim —Preceding unsigned comment added by 72.40.73.239 (talk) 11:57, 18 January 2008 (UTC)

This page seems to cover tractor tyre codes: http://www.millertire.com/FAQs.asp -- someone ought to add information about tractor tyres to this article. It says:

If your tire size has two sets of numbers (6-12, 5.00-15, 11.2-24…) the first number (5.00-15) is the approximate width in inches; the second number (5.00-15) is the rim diameter. If your tire size has three sets of numbers (15/6.00-6, 26/12.00-12, 31/15.50-15) the first number (26/12.00-12) is the approximate height, the second number (26/12.00-12) is the width, and the third number (26/12.00-12) is the rim size. SteveBaker (talk) 23:39, 20 January 2008 (UTC)

Numeric and Alpha Numeric

The general "tire size" topic would not be complete without mentioning pre-"P-metric" sizes. Take a look at [1] if you're wondering what I'm talking about.69.210.14.71 (talk) 19:12, 6 February 2008 (UTC)

In the UK we don't have vehicle class

On all the tyres I have seen in the UK they don't have a vehicle class digit. Mabey someone might consider that in making this artical more worldwide. --Siripswich (talk) 18:38, 16 April 2008 (UTC)