| Re: What's the "c" mean in tire size?
Ken wrote:
> "Fred Hall" <fhall1@twcny.rr.com> wrote in
> news:rWZGc.30688$iJ4.25504@twister.nyroc.rr.com:
>
>>Been looking at some tires and was wondering...I see some listed as 700 x
>>23 and others listed as 700 x 23c (or 25c or 28c). My question is what
>>difference is denoted by having the "c" there?
>
>
> 700A, 700B, and 700C are all tire size standards. Only 700C is used today.
> If you see 700 without the "C" on a modern tire or rim, you can assume 700C.
Ken's right. Long, long ago (in Europe) the tire and wheel sizing was
much different. 700 A, 700 B and 700 C all had the same outside
diameter of the tire. But the tires had different widths, so the rims
had different diameters. A 700 C tire wouldn't fit a 700 B rim.
Now all "700" rims have the same bead seat diameters, and if you change
to a fatter tire, your outside diameter increases.
You can still (with difficulty) get 650 B wheels and tires. A little
less diameter, a little more width than your typical road wheel & tire.
--
--------------------+
Frank Krygowski [To reply, remove rodent and vegetable dot com,
replace with cc.ysu dot edu]
|