But your numbers must change as you get fitter stronger etc. That's what RPE is about pace judgement and form. I wonder if you have ever experience that "magic" state called form, that elusive "invincible" thing called form. The time when you are waiting on the line as the countdown reaches 5-4-3-2-1 and you are in the form of your life and you go and nail it, every bend taken perfectly, pushing the limit on the drags knowing that on the downhill coming up you can recover and pick up the pace with a final flourish in the last 200 metres or so. Delicious feeling that stays with you and keeps you awake in bed as you relive every moment again in your head.