Og Will skriv akkurat det same når det gjeld utveksling. Eg synest det var interessant at han hadde berekna så grundig kva slags utveksling han trengte:
"The gearing is the important thing here – I wanted the lowest gearing I could practically get. I know that in ultra-distance events my power output should not go above around 200 W for any significant length of time (this was my average power for the 2-hour ascent of Lysebotn). I also know that I don’t want to do an extended climb at less than, say, 60 rpm.
Alpine climbs tend to be around 10% or a bit less, and if you shove all these numbers into a calculator, you get around 25 gear inches for the total weight of me, my bike, and my kit (90 kg). But it’s nice to have a bit of breathing space below that, and it turns out that the “gravel” drivetrain mentioned above gives me 22.6 gear inches in the lowest gear, allowing me to tackle an 11% incline at 60 rpm/200 W, with all my bikepacking gear in tow.
The message here is: get the lowest gears you can. Standard “road bike” gearing is really not adequate for bikepacking/ultra events on mountainous routes, given that you need to be very conservative with your power output."
Og 25 gear inches er den same utvekslinga som du valte (34/36).
Men med "breathing space" og 22,6 gear inches, det blir 34/40 (eller 30/36 i Will sitt tilfelle)! Som tilfeldigvis er det same som eg brukte på 1001 Miglia. Men det var med liggesykkel. Eg såg ingen andre med tilsvarande låg utveksling. Men så hadde ikkje vi 10 kg med bagasje heller, då.
