Thanks guys, I'm starting again from a long, 15 year layoff and hills are giving me an unusually hard time, I can make it but much slower and lower gearing, same bike.

Besides being older, I guess, the biggest difference is the body weight. I'm still 15-20 pounds heavier today, but losing it rapidly and already lost 50, about 11 inches off the waist!

I was confused because I read somewhere (forgot where) that weight just makes a slight difference. I must have read it wrong.

NoRacer, I'll try out the chart, thanks.

knotty