do the pros spin in top gear

andy610

do the pros spin about 90 spins per min on the straights in the highest gear on the big front chain ring or do they sometimes use the middle chain ring as well

on the road

The pros don't have a middle chain ring.

Dorian Gray

What middle chainring? They nearly always use double chainrings with around 39 teeth on the small ring and 53 on the big one. No human can spin 90 RPM on the flat in 53 x 12 for long, so no, they don't do that. Today the average speed in the Tour de France was 43 km/hr. Assuming a large chainring of 53 teeth, 90 RPM cadence, and doing the tedious calculations which I've just done, that works out to requiring between 14 and 15 teeth at the rear. Of course they went faster and slower than the average speed at various points, and they pedalled faster and slower than 90 RPM, but 53 x 14 or 53 x 15 would be typical cruising gears for these guys.

SteveR_100Milers

Dorian Gray wrote:

What middle chainring? They nearly always use double chainrings with around 39 teeth on the small ring and 53 on the big one. No human can spin 90 RPM on the flat in 53 x 12 for long, so no, they don't do that. Today the average speed in the Tour de France was 43 km/hr. Assuming a large chainring of 53 teeth, 90 RPM cadence, and doing the tedious calculations which I've just done, that works out to requiring between 14 and 15 teeth at the rear. Of course they went faster and slower than the average speed at various points, and they pedalled faster and slower than 90 RPM, but 53 x 14 or 53 x 15 would be typical cruising gears for these guys.

is the longest version of "No" I have seen...

Dorian Gray

Indeed! And for that I apologise.

How do you quote someone's text with their name in this new forum, like you did with my text just now?

SteveR_100Milers

Dorian Gray wrote:

Indeed! And for that I apologise.

How do you quote someone's text with their name in this new forum, like you did with my text just now?

Press the "quote" button (thats opposite the posters name to the right above their post....)

Dorian Gray

SteveR_100Milers wrote:

Press the "quote" button (thats opposite the posters name to the right above their post....)

Thanks! Was looking for it in the wrong place.

jibi

No

ricadus

:roll:

(non-verbose answer to original question).