How fast can you go with 104 tooth chainring?
Kupe
Posts: 758 Member
Replies
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This is a sport called auto pacing - the cyclist has a crazy high gear ratio and drafts behind a car to not only cut aerodynamic drag, but to use the effect of the low pressure area behind the pacing vehicle to help push the bike, much in the same way the air coming off a windshield on a convertible causes the air to move forwards into the cabin, rather than backward. Most of these bikes have the forks running the wrong direction so it can be a tiny bit closer to the pacing vehicle; they're practically against the rear bumper.
I think this is the current record holder:
http://www.fredrompelberg.com/en/html/algemeen/fredrompelberg/record.asp0 -
Watched the Guy Martin / Rourke Cycles attempt on the UK cycle speed record a while ago - because of the "dinner plate" chainring that's needed, they chose to use a "multiplier drive" instead - a bit like a crossover drive some tandems used to have...
http://rourke.biz/blog/189/guy-martin-speed-britains-fastest-cyclist-100mph-bike
bike has big tyres and flat-bars like a MTB because the record was actually done on Pendine Sands rather than on tarmac. They used a Racing HGV Truck with a large wind-deflector panel on the rear, and the bike had to be towed up to something like 60mph, owing to the gearing being so difficult to actually get rolling.
Amazing to watch, and makes you wonder what they could have done on a stretch of closed motorway rather than a dog-rough beach...0 -
Amazing what some people will resort to just to get a Strava KOM
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STRAVA!!!!0
