CaptJon – Member
Is wattage absolute? How does fitness come into it? If i rode at x watts, surely i’d be going slower than a Tour rider…?
SRM and the like measure watts transmitted to the bike. For a given size of rider on the flat, wattage for a given speed will basically the same irrespective of fitness and weight (well heavier will slow you down very slightly). For a given weight of rider on the hills at a given speed, wattage will again be the same irrespective of fitness.
What’s different for different fitness is your ability to generate that wattage and sustain it. A fit rider may be able to ride at x watts for 8 hours while the unfit one could only do x watts for 10 minutes.
So basically if you rode on the flat in the tdf peloton, you’d be doing the same watts as the other riders around you. If you hit the hills, unless you’re a complete whippet, you’d be doing more watts for the same speed or more likely less watts and less speed 🙂