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Old 09-10-25 | 05:31 AM
  #4209  
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spclark
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From: "Driftless" WI

Bikes: 1972 Motobecane Grand Record, 2023 Specialized Tarmac SL7,'26 Spesh Diverge, '22 Kona Dew+

Originally Posted by Pratt
If you increase your speed on the flat from 12 to 13 MPH, you will have to put out 17% more effort.
Strava tells me that my mileage agg for this year (trainer early, outdoors once weather turned) just passed 1,000 yesterday. Total time actually moving? 75 hours, giving an average of 13.4 mph.

Originally Posted by Pratt
Wind resistance goes up as the square of the speed, and 169 is 17% bigger than 144.
On a trainer where there's no wind, or outdoors when climbing, what's the % between incremental miles per hour look like up to maybe 20?

Originally Posted by Pratt
The magic of a super light road bike pales beside the magic of 25 year old legs.
Don't remind me of that too often please. You have memories of where you were in 1974? At 76 now I can barely remember what 25 even felt like...
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