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Old 08-15-11, 07:16 PM   #1
Easy Peasy
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Cycling speed

Assuming two riders have the same body and bike weights and roughly same level of fitness,

Does the person with a larger wheel diameter go faster?

Does the person with longer leg length cover go faster?

Just trying to figure out why I'm so slow!
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Old 08-15-11, 08:24 PM   #2
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The reason you are slow is that you are posting here instead of riding. HTFU and pedal harder!
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Old 08-15-11, 08:40 PM   #3
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Quote:
Originally Posted by Easy Peasy View Post
Does the person with a larger wheel diameter go faster?
Slower - the taller tire presents more surface to apparent wind.

Quote:
Originally Posted by Easy Peasy View Post
Does the person with longer leg length cover go faster?
Slower, same reason.

But neither enough to explain "slow". To go faster we have to spin the pedals faster. Seriously: no gearing, no leverage, no relative proportions will make someone faster. It's a matter of power applied to the pedals.
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Old 08-15-11, 08:46 PM   #4
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aerodynamics.. if you are shaped like a Bonneville Utah Salt Flats Racer.
then the airflow is passing smoothly around you, with less resistance
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Old 08-15-11, 08:50 PM   #5
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Just trying to figure out why I'm so slow!
You need a better motor, i.e. one that weighs less and/or puts out more power.
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Old 08-15-11, 11:38 PM   #6
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I think the only significant biomechanical reason for not being faster is a poor fit to the bike.

But . . . cycling is hard work and requires fairly refined technique. Riding more, and riding hard, will improve strength, muscular endurance, respiratory capacity, metabolic efficiency, etc. As you ride more you also naturally improve your technique and position, but it helps to get guidance on learned skills to speed that process along, even if it from a book.

Minor aerodynamic tweaks or leg length differences are the difference between "really fast" and "super fast". If you are "slow" there is a lot more going on.
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Old 08-16-11, 06:52 PM   #7
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Quote:
Originally Posted by Easy Peasy View Post
Assuming two riders have the same body and bike weights and roughly same level of fitness,

Does the person with a larger wheel diameter go faster?

Does the person with longer leg length cover go faster?

Just trying to figure out why I'm so slow!
Andy Schleck has the longer legs and bigger size bike, but Cadel Evans on certain stages, even though he was behind, didn't give up overall time that much.
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Old 08-16-11, 07:04 PM   #8
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Quote:
Originally Posted by Easy Peasy View Post
Assuming two riders have the same body and bike weights and roughly same level of fitness,

Does the person with a larger wheel diameter go faster?

Does the person with longer leg length cover go faster?

Just trying to figure out why I'm so slow!
You need bigger wheels:
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Old 08-16-11, 07:08 PM   #9
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You need bigger wheels:
And longer legs:
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Old 08-17-11, 06:56 PM   #10
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Quote:
Originally Posted by Easy Peasy View Post
Assuming two riders have the same body and bike weights and roughly same level of fitness,

Does the person with a larger wheel diameter go faster?

Does the person with longer leg length cover go faster?

Just trying to figure out why I'm so slow!
A passenger train leaves NY at 3 PM headed to Boston. It is traveling at 55 MPH. A freight train leaves Boston at 3:30 PM headed to NY. It is traveling at 100 KPH.

At what time will they serve dinner on the passenger train?

Answer: Not enough information to determine.
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Old 08-17-11, 07:48 PM   #11
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Quote:
Originally Posted by Easy Peasy View Post
Assuming two riders have the same body and bike weights and roughly same level of fitness,

Does the person with a larger wheel diameter go faster?

Does the person with longer leg length cover go faster?

Just trying to figure out why I'm so slow!

It's the guy that's on the wheel of the first guy near the line.

Cippolini. Cavendish. et al. Ride smarter, not faster.

It's like Einstein and Alabama. All relative.
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Old 08-17-11, 07:52 PM   #12
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If it's a mtn bike vs a road bike, equalizing the weight isn't enough. Knobbies just don't roll as well as road tires. Aerodynamics and gearing also conspire against mountain bikes. If it's road bike vs road bike, though, I'd fall in the 'HTFU' camp. If you're worried about minimizing your frontal area, just pick how far you want to go down that path!



(Apologies for camera perspective making the shoes on the right look like size 25s.)
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Old 08-18-11, 12:39 AM   #13
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So Cal Timing Assn. shows a 50cc streamlined motorcycle as clocking 140 mph .
it's less about power than minimizing air drag.

put that guy on the right side of the picture, in a form
like a double pointed pencil and he would be even faster.

Merkx Hour was attempted at a Mexico City velodrome,
because at that altitude the air density was less.
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Old 08-18-11, 07:52 AM   #14
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Just gotta get out and hammer the pedals. Earlier this year I could barely get the bike up to 20 and barely hold 17 mph. Now, 30 is attainable. 20 is sustainable.
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