Dave Moulton has a VERY interesting blog that in my mind is WELL worth a read.http://davesbikeblog.squarespace.com/blog. or Email Dave for site add at dave@prodigalchild.net Be SURE to read about the Higginson Twins,Outstanding Brit riders that I had the honor of racing against in the early 50s, UNDER the hour for 25miles on a 72" limited gear, (1-5 was the best I everdid on72") , WOW! figure the revs on that under the hour ride. Legs must have been just a blur! Mine would have fallen off at that speed. I even wonder if Lance could have done that,By the way we HAD to have ONE brake and a Bloody bell PLUS ALL black strip to race in those days. Cheers John Crump OldundertheweatherBrit, Parker, Co USA