Stupid MTB vs. Road Bike frame sizing question

Bob said:

Stupid question:

In general, if you are building an MTB/rough surface bike where
you will be sitting in a more upright position but you are
sticking with a 700c wheel... does the frame need to get a couple
inches smaller ? Am I totally whacked to do this on 700c wheels or
am I just into Sheldon territory ?

Mountain bike guys call an MTB with 700c wheels a "29er."

Mostly you're better off with more standover height on an off-road bike, since
whenever you stop or catch a fall you'll probably be on uneven and/or loose
ground.

Anyway, nothing all that weird about using the larger wheel for offroad. You'll
find plenty of suitable tires, wheelsets and frames for the job.

What've you got in mind?

Ron

"Mark Hickey" wrote: You will need to factor in more standover clearance if
you'll be riding it on "rough surfaces", but how much clearance is enough is
up to the rider and depends on HOW rough the surface is. (clip)
^^^^^^^^^^^^^^^^
Besides needing enough standover height, there is a second reason for
toptube/crotch clearance. Riding over difficult terrain at low speed, the
rider leans the bike while standing on the pedals. If the top tube is too
high, the clearance for this type of maneuvering is limited.

Leo Lichtman said:

Besides needing enough standover height, there is a second reason for
toptube/crotch clearance. Riding over difficult terrain at low speed, the
rider leans the bike while standing on the pedals. If the top tube is too
high, the clearance for this type of maneuvering is limited.

And you get a nasty bruise on the inside of your leg where
the top tube hits it. :-)

Duke

"RonSonic" <[email hidden]> wrote in message
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Quoted message said:

On Wed, 10 Aug 2005 06:26:21 GMT, Bob <[email hidden]> wrote:

Quoted message said:

Mountain bike guys call an MTB with 700c wheels a "29er."

Hmm. I'd call it a 'cross bike 🙂

Lee