I'm not shooting the messenger, buy, nah, that's that crazy Kirby Palm formula. Sorry to everyone for banging on about this again, but I'll keep doing it until this crap disappears. I wish that guy would stop paying his server fee so the site would die. And I wish Zinn would stop using it to try to sell 200m cranks to tall riders. It's an isanse formula which puts anyone over 6ft on (for eg) 195mm cranks, or longer!! He just made it up, then handpicked some numbers to support it, ignoring a whole bunch of other numbers.

I'm 6ft with an 89.5cm inseam, and I tried 180mm cranks for a year, but they were a bit crap because they were too long for me. Now I ride 172.5s, but have some 177.5s that I sometimes experiment with on hilly rides.

In my opinion, long cranks (5mm or longer) effect position more than anything else. By the time you lower the saddle to accomadate the extra length, longer cranks are much harder to push because the rider is relatively lower. This defeats a lot of the 'advantage' of any extra leverage.

If yooz want me to bang on further, I will