R
Ryan Cousineau
Guest
In article <[email protected]>,
Mark Hickey <[email protected]> wrote:
> "Johnny Sunset aka Tom Sherman" <[email protected]> wrote:
>
> >Mark Hickey wrote:
>
> >> >>> <http://www.challengebikes.com/images/picture.php?filename=images/fotos
> >> >>> /nme/foto-001.jpg&size=500&type=2&quality=87>,
> >> >>>
> >> >>> <http://www.challengebikes.com/html/picturepopup.php?picture=images/f
> >> >>> otos%2Fnme%2Ffoto-011.jpg&quality=87&size=100%25&type=0&show_info_tags=
> >> >>> 1&sort=1&repeat=&taal=en>,
> >> >>>
> >> >>> <http://www.challengebikes.com/images/picture.php?filename=images/fotos
> >> >>> /nme/foto-012.jpg&size=500&type=2&quality=87>.
> >>
> >> I suspect trying to keep your right knee away from the chain might
> >> keep you awake... (or do 'bent riders like to ride with their knees
> >> "John Wayne style"). ;-)
> >
> >Having owner several lowracers and ridden a few more, contact between
> >the chain and the rider's leg will not be an issue, unless the rider
> >has very fat legs. In that case, he/she is not likely to be riding a
> >high performance bike.
>
> I'm truly curious about this though - I know on my own wedgie bikes,
> my knees pass within an inch or so of the top tube. If I assume that
> I don't automatically go all bow-legged when riding a 'bent, I'd
> assume that the when my knees passed across the upper chainline/pulley
> on the 'bent in the photos above, that they'd be similarly close to
> the bike's centerline (something around two inches / 5cm or less).
> Clearly the chain is further from the bike's centerline than that - I
> suspect that the tube itself is wider than that - add at least a
> couple more inches for the idler pulley and chain, and I simply don't
> see why I wouldn't be smacking some part of my leg on the drivetrain
> regularly.
>
> What am I missing?
I suspect there's two easy answers here:
1) despite what you may think, your knee never goes near the chain (or
that top idler pulley). It traces a circle within the triangle made by
the chain run, and that circle may not even cover the frame tube. Note
that the seat is really low: your leg definitely on a strongly upward
line. Indeed, this bike seems to have a high "bottom" bracket even by
lowracer standards. Hm...I checked a few, this seems fairly typical of
lowracer designs.
2) the Q factor could just be really bad, fixing all the clearance
problems.
I think a more serious concern is whether this vehicle (human powered)
might inspire more bad lowracer epic poems:
http://32go.us/pow/lowracer.htm
Please, no,
--
Ryan Cousineau [email protected] http://www.wiredcola.com/
"I don't want kids who are thinking about going into mathematics
to think that they have to take drugs to succeed." -Paul Erdos
Mark Hickey <[email protected]> wrote:
> "Johnny Sunset aka Tom Sherman" <[email protected]> wrote:
>
> >Mark Hickey wrote:
>
> >> >>> <http://www.challengebikes.com/images/picture.php?filename=images/fotos
> >> >>> /nme/foto-001.jpg&size=500&type=2&quality=87>,
> >> >>>
> >> >>> <http://www.challengebikes.com/html/picturepopup.php?picture=images/f
> >> >>> otos%2Fnme%2Ffoto-011.jpg&quality=87&size=100%25&type=0&show_info_tags=
> >> >>> 1&sort=1&repeat=&taal=en>,
> >> >>>
> >> >>> <http://www.challengebikes.com/images/picture.php?filename=images/fotos
> >> >>> /nme/foto-012.jpg&size=500&type=2&quality=87>.
> >>
> >> I suspect trying to keep your right knee away from the chain might
> >> keep you awake... (or do 'bent riders like to ride with their knees
> >> "John Wayne style"). ;-)
> >
> >Having owner several lowracers and ridden a few more, contact between
> >the chain and the rider's leg will not be an issue, unless the rider
> >has very fat legs. In that case, he/she is not likely to be riding a
> >high performance bike.
>
> I'm truly curious about this though - I know on my own wedgie bikes,
> my knees pass within an inch or so of the top tube. If I assume that
> I don't automatically go all bow-legged when riding a 'bent, I'd
> assume that the when my knees passed across the upper chainline/pulley
> on the 'bent in the photos above, that they'd be similarly close to
> the bike's centerline (something around two inches / 5cm or less).
> Clearly the chain is further from the bike's centerline than that - I
> suspect that the tube itself is wider than that - add at least a
> couple more inches for the idler pulley and chain, and I simply don't
> see why I wouldn't be smacking some part of my leg on the drivetrain
> regularly.
>
> What am I missing?
I suspect there's two easy answers here:
1) despite what you may think, your knee never goes near the chain (or
that top idler pulley). It traces a circle within the triangle made by
the chain run, and that circle may not even cover the frame tube. Note
that the seat is really low: your leg definitely on a strongly upward
line. Indeed, this bike seems to have a high "bottom" bracket even by
lowracer standards. Hm...I checked a few, this seems fairly typical of
lowracer designs.
2) the Q factor could just be really bad, fixing all the clearance
problems.
I think a more serious concern is whether this vehicle (human powered)
might inspire more bad lowracer epic poems:
http://32go.us/pow/lowracer.htm
Please, no,
--
Ryan Cousineau [email protected] http://www.wiredcola.com/
"I don't want kids who are thinking about going into mathematics
to think that they have to take drugs to succeed." -Paul Erdos