This is simple. If you want to calculate your power-to-weight ratio for, say, 20 minutes, just ride as hard as you can for 20 minutes, weigh yourself, and divide the first number by the second.
Then, after you’ve gazed in horrified disappointment at the number you got, you’ll need to make a few allowances.
Chances are your power meter has an accuracy of something like two per cent. Well, in that case add two per cent to your power because, seriously, when in life did an error like that ever work in your favour?
Then add a bit more, on the basis that your legs didn’t feel at their best, you forgot to load up on caffeine beforehand, your left shoe was done up tighter than your right, and you’re…
