Controversial, but why not just ride up on feel? You're experienced enough to know when you're riding at an unsustainable pace.
Pretty much what I will be doing - just wanted to have a rough number in mind. In terms of feel I know what I can maintain on say; a hard climb in Wales for 40 mins.. but 2 a solid 2 hour climbing effort is not something I've done since I did the Etape (back then it was just a case of "get up however you can" for me).
I have half a mind to leave the PT and HR monitor at home and take some nice light wheels.. but seems like a decent opportunity to collect some data. #nerd.
Pretty much what I will be doing - just wanted to have a rough number in mind. In terms of feel I know what I can maintain on say; a hard climb in Wales for 40 mins.. but 2 a solid 2 hour climbing effort is not something I've done since I did the Etape (back then it was just a case of "get up however you can" for me).
I have half a mind to leave the PT and HR monitor at home and take some nice light wheels.. but seems like a decent opportunity to collect some data. #nerd.