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View Full Version : Something special for all the sprinters out there

Chris
27-05-2010, 09:20 PM
For sale 96 tooth chain ring (http://www.auctionflex.com/showlot.ap?co=9768&weid=11890&weiid=4178981&mindate=19900101&maxdate=20501231&lso=lotnumasc&pagenum=1&lang=En).
SSSimon
27-05-2010, 09:38 PM
Not for the sprinters. More for pursuiters. This bike would have been used for setting motor paced speed records. One such attempt they laid boards between railway tracks and the cyclist was loco-paced to a cycling speed record
Simonsky
27-05-2010, 10:50 PM
bewdy. all I need now is a 69 tooth sprocket to go with it!
Chris
27-05-2010, 11:21 PM
Not for the sprinters. More for pursuiters. This bike would have been used for setting motor paced speed records. One such attempt they laid boards between railway tracks and the cyclist was loco-paced to a cycling speed record

Sounds cool but crazy.
SimonD
28-05-2010, 09:39 AM
Cripes. What sort of speed would you need to spin out that thing? Actually, is it one of Callahan's fixie builds? I know he like a big gear.
Bean
28-05-2010, 09:46 AM
haha. love it. cornering must be a *****!
So_Far
28-05-2010, 03:55 PM
Speed bumps would be a bit annoying too.
SimonD
28-05-2010, 04:42 PM
Can someone estimate a roll out for me?
bosworth*
28-05-2010, 04:55 PM
(2096 x 96 / 10?,11?,12?)mm
SimonD
28-05-2010, 05:05 PM
i went with a 14 tooth rear. So only 14 metres? So 120 rpm to get to 100km/hr. Not as much as I thought.
Steven
28-05-2010, 05:32 PM
Gimmick cranks but non-original and fitted to what is in fact a knackered old 10-speed.

Still... gimmick cranks for US$625... I'd love to have a frame custom-built for 'em.
SimonD
28-05-2010, 05:35 PM
Did I get the speed calculations right?
Steven
28-05-2010, 06:43 PM
199.4 chain inches with a 13t sprocket. 15.9m for you metricists, 114kph at 120rpm.
SSSimon
28-05-2010, 07:12 PM
A good trackie could hold a cadence of 180 - so cycling along for 1.6ks at 150kmh 1 metre behind a train to would be a huge rush!
So_Far
28-05-2010, 09:57 PM
http://www.youtube.com/watch?v=q77GMkXzOVE

now that's how it should work.
SimonD
28-05-2010, 10:14 PM
So what are the cycling speed records? With and without drafting. Recumbent and upright?
SimonD
28-05-2010, 10:31 PM
http://www.youtube.com/watch?v=q77GMkXzOVE

now that's how it should work.

That's a 232 inch gear.

Good find!