Max Tire size on Modern frame



W

Werehatrack

Guest
On Thu, 08 Jul 2004 19:45:54 -0700, Robert Masse <[email protected]>
wrote:

>
>http://tinyurl.com/2zfcg

Supergo uses actively scripted pages; that link leads only
to their index page; the rest of the URL was probably buried
in a cookie.

>Will a 700c x 28 tire fit on the rear of this frame? The
>frame is a size 60. I normally buy IRC duro road tires in
>size 28 and the rim is a 700c open pro (if that even
>matters).

Frame size often has little impact on max tire width
capability; the chainstay spacing may be the limiting
factor, and it won't usually change with frame dimensions.
That said, the only way to find out about the clearance will
be to ask for specific dimensional information...and bear in
mind that when going from one tire brand or model to
another, 700x28 may not be the same actual size of tire.
--
Typoes are a feature, not a bug. Some gardening required to
reply via email. Surrealism is a pectinated ranzel.
 
M

Mark Hickey

Guest
Werehatrack <[email protected]> wrote:

Robert Masse <[email protected]>wrote:

>>Will a 700c x 28 tire fit on the rear of this frame? The
>>frame is a size 60. I normally buy IRC duro road tires in
>>size 28 and the rim is a 700c open pro (if that even
>>matters).
>
>Frame size often has little impact on max tire width
>capability; the chainstay spacing may be the limiting
>factor, and it won't usually change with frame dimensions.
>That said, the only way to find out about the clearance
>will be to ask for specific dimensional information...and
>bear in mind that when going from one tire brand or model
>to another, 700x28 may not be the same actual size of tire.

Normally the limitation on tire size is the position of the
brake bridge. It has to be low enough to allow the current
crop of very low reach calipers to work, which limits the
maximum size of tire that will fit. If a custom frame
customer is willing to use longer calipers I'll raise the
brake bridge accordingly.

Of course, I'm talking about tire "height", but since
they're all basically round it's kinda the same.

Some builders don't relieve the front inside of the
chainstays to allow extra lateral clearance, and that too
can be a limitation. Remember that the issue isn't how large
a tire will clear the chainstays, but how large a tire will
clear the chainstays with a broken spoke.

Mark Hickey Habanero Cycles http://www.habcycles.com Home of
the $695 ti frame
 
W

Werehatrack

Guest
On Fri, 09 Jul 2004 07:13:48 -0700, Mark Hickey <[email protected]>
wrote:

>Normally the limitation on tire size is the position of the
>brake bridge.

Thanks, I sometimes don't think about the fact that late
roadie calipers have been downsized to the point where they
will barely clear the tires. (I *should* be thinking about
it, I got bit by that recently, but the mind slips.)

> It has to be low enough to allow the current crop of very
> low reach calipers to work, which limits the maximum size
> of tire that will fit. If a custom frame customer is
> willing to use longer calipers I'll raise the brake bridge
> accordingly.
>
>Of course, I'm talking about tire "height", but since
>they're all basically round it's kinda the same.
>
>Some builders don't relieve the front inside of the
>chainstays to allow extra lateral clearance, and that too
>can be a limitation.

This is the problem I've encountered more often; it can
appear even on older frames with a high brake bridge, but
since the OP was inquiring about a new frame, your
observation is probably even more relevant.

>Remember that the issue isn't how large a tire will clear
>the chainstays, but how large a tire will clear the
>chainstays with a broken spoke.

Particularly if the wheels have less than 32 to begin with.
--
Typoes are a feature, not a bug. Some gardening required to
reply via email. Surrealism is a pectinated ranzel.