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Discussion Starter · #1 ·
Hello,

During tonights group ride I hit over 50 mph on a decent using my new 46/34 crank attached to a 12-27 cassette.

I was able to use a lot more gears while in the 46 .

So far so good!


Take care!

Gall
 

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Resident Curmudgeon
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At 50 mph you weren't pedaling. If you were you were just soft pedaling or just moving your feet. Even professional riders who use lots larger gears than you rarely pedal on descents when speeds reach >35.
 

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Gall said:
Hello,

During tonights group ride I hit over 50 mph on a decent using my new 46/34 crank attached to a 12-27 cassette.

I was able to use a lot more gears while in the 46 .

So far so good!


Take care!

Gall
And I thought I wrote some silly things:p
 

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Escorted from the White House
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To parse the OP's post, I guess the point was you don't really need ginormous gears for descents, 'cuz you can aero tuck and go way faster that way than you could by pedaling.

You see TDF riders doing it all the time... and they hit 100+ kph (62mph), which spins out everything... even 53x11. :eek:
.
 

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Descender
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50 MPH on a 46 x 12 would be well over 140 rpm - someone can figure it out exactly (don't know the formula).
You weren't pedaling (pushing the gear with those RPM's)
 

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'brifter' is f'ing stupid
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Mr. Versatile said:
At 50 mph you weren't pedaling. If you were you were just soft pedaling or just moving your feet. Even professional riders who use lots larger gears than you rarely pedal on descents when speeds reach >35.
come to the track sometime...40mph sprints on 50/14. 'course i wouldn't want to do it for more than a few hundred meters!
 

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pdh777 said:
50 MPH on a 46 x 12 would be well over 140 rpm - someone can figure it out exactly (don't know the formula).
You weren't pedaling (pushing the gear with those RPM's)
46 x 12 @ 50 mph = 166 crank rpm w/ 700C wheels and 700 x 23 tires.
 

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Compact cranks are for going uphill, gravity is for going downhill.
 
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