Disk brakes?

I would like to point out that drinking kills brain cells. Is it
possible that jim beam is just drunk? I hope Mr. beam has a good
sense of humor, as I am just kidding. But just in case he's not a
good sport, I would also like to call myself an idiot.

Tim McNamara said:

In article <[email hidden]>,

jim beam said:

Chalo said:

jim beam wrote:
> that's about as retarded as solid cast bike wheels.

There are valid reasons to use such things, which is why most
racing motorcycles have cast aluminum wheels instead of wire
wheels.

you're right, but it doesn't make sense for an ordinary bike unless
there's some special reason. high end bmx for instance is not as
weight obsessed. the weight penalty for racing bikes precludes them.
and the price exceeds that of a wire wheel on low end bikes by some
margin. makes no sense on either count.

Most of the BMX wheels I have seen were plastic, not cast metal, and
were of predictably very poor quality. Are there cast metal BMX wheels?

jim's point, that the strength to weight ratio of spoked wheels is so
advanageous that they are still the dominant technology in bicycles, is
a good one. The few attempts at making a light weight equivalent to a
"cast" wheel- trispokes, Rev-X, etc.- were not broad market successes
and in the case of the Rev-X a markedly inferior design that
disappeared. Those designs are limited to specialty use such as time
trials and track racing.

Motorcycles have enough excess power that weight is much less an issue
than with bicycles.

Quoted message said:

it's also worth noting that among alloy wheels, not all are cast -
high end racing wheels for cars and motorcycles are forged.
expensive too.

Really? I did not know that. Learn something new every day.

Dear Tim,

For what it's worth, most dirt racing motorcycles still use spoked
wheels, while street machines have moved mostly to solid wheels.

A possible explanation is that dirt machines use suspension with
considerably greater travel and therefore are more sensitive to the
increase in unsprung weight that usually comes with solid wheels.

Cheers,

Carl Fogel

In article
<[email hidden]>,

Mark Hickey said:

jim beam <[email hidden]> wrote:

How can we all tell that Frank's proven Jim wrong?

Quoted message said:

idiot.

His standard response to being proven wrong. It's all over here
folks, move along... nothing to see.

Au contraire; lest we forget.

--
Michael Press

Tim McNamara said:

Most of the BMX wheels I have seen were plastic, not cast metal, and
were of predictably very poor quality. Are there cast metal BMX wheels?

I know that at least Lester, Mongoose, CYC, and Grimeca made Aluminum
BMX wheels, because I have seen all of those firsthand.

Chalo

Quoted message said:

Tim McNamara said:

Most of the BMX wheels I have seen were plastic, not cast metal, and
were of predictably very poor quality. Are there cast metal BMX wheels?

Chalo said:

I know that at least Lester, Mongoose, CYC, and Grimeca made Aluminum
BMX wheels, because I have seen all of those firsthand.

Chalo's right. In the late seventies/early 80s aluminum cast wheels were
competitive in the BMX market. Yes, heavy - but not overly so and they
had a following.
--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971