tire size, 27 * 1 & 1/4 or 700 * 32

[Bert]

What exactly is the difference between 27 by 1 and 1/4 and 700 by 32? Are these different
measurements on the same tire?

700mm is 27.55 inches. The tire I currently have on the rim is 27 inches. will a 700 mm tire work?

Sorry if this a newbie question, but I'd like to know as I gotta replace some rubber.

BTW any suggestions for good economical tires ($10 to 20 US)? I've seen some IRC ones for a few
bucks but I imagine these are of lower quality.

Thanks!

Bert

 

[Pete Geurds]

You can't interchange on same rim if that's what you mean. The bead seat diameter is different;
622mm for the 700C and 630mm for the 27". If you don't like the IRC's(which are ok tires) check out
the Continental Sport 1000.

http://www.nashbar.com/profile.cfm?category=&subcategory=&brand=1126&sku=4 263&storetype=&estoreid=

Pete Geurds Douglassville, PA

 

[Sheldon Brown]

Bert wrote:

> What exactly is the difference between 27 by 1 and 1/4 and 700 by 32? Are these different
> measurements on the same tire?
>
> 700mm is 27.55 inches. The tire I currently have on the rim is 27 inches.

Those are nominal dimensions based on ancient tires. 700c wheels are actually smaller than
27 inchers.

> will a 700 mm tire work?

Absolutely not.

> Sorry if this a newbie question, but I'd like to know as I gotta replace some rubber.

I have a Web article that explains the arcane details of tire sizing,

See: http://sheldonbrown.com/tire-sizing.html

> BTW any suggestions for good economical tires ($10 to 20 US)? I've seen some IRC ones for a few
> bucks but I imagine these are of lower quality.

IRC tires tend to be quite good. We have a pretty good selection, see:

http://sheldonbrown.com/harris/tires.html#630

Sheldon "ISO/E.T.R.T.O." Brown +---------------------------------------------+
| The nice thing about standards is that | there are so many of them to choose from. | --Andrew S.
| Tanenbaum |
+---------------------------------------------+ Harris Cyclery, West Newton, Massachusetts Phone
617-244-9772 FAX 617-244-1041 http://harriscyclery.com Hard-to-find parts shipped Worldwide
http://captainbike.com http://sheldonbrown.com

 

[Bert]

On Wed, 18 Dec 2002 14:29:59 -0500, Sheldon Brown <[email protected]> wrote:

>Bert wrote:
>
>> What exactly is the difference between 27 by 1 and 1/4 and 700 by 32? Are these different
>> measurements on the same tire?
>>
>> 700mm is 27.55 inches. The tire I currently have on the rim is 27 inches.
>
>Those are nominal dimensions based on ancient tires. 700c wheels are actually smaller than
>27 inchers.
Well it is an old Miyata bike that still works really good for me. I intend to get at least another
number of years out of it.
>
>> will a 700 mm tire work?
>
>Absolutely not.
Thanks!
>
>> Sorry if this a newbie question, but I'd like to know as I gotta replace some rubber.
>
>I have a Web article that explains the arcane details of tire sizing,
>
>See: http://sheldonbrown.com/tire-sizing.html
>

I read this through this before posting, but it was still not clear to me at the time.
>> BTW any suggestions for good economical tires ($10 to 20 US)? I've seen some IRC ones for a few
>> bucks but I imagine these are of lower quality.
>
>IRC tires tend to be quite good. We have a pretty good selection, see:
>
>http://sheldonbrown.com/harris/tires.html#630
>
>Sheldon "ISO/E.T.R.T.O." Brown +---------------------------------------------+
>| The nice thing about standards is that | there are so many of them to choose from. | --Andrew S.
>| Tanenbaum |
>+---------------------------------------------+ Harris Cyclery, West Newton, Massachusetts Phone
>617-244-9772 FAX 617-244-1041 http://harriscyclery.com Hard-to-find parts shipped Worldwide
>http://captainbike.com http://sheldonbrown.com