When I set up my PX-10 in 1980, I found it really useful to do the math manually (pencil and notepad). I learned a lot in the process, and got the gear choice correct.
Great running gears.
Someday, I'm gonna have to try one of these new fangled compact cranks on a 10 or 11-speed rear end!
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1959 Hilton Wrigley Connoisseur (my favorite!)
1963 Hetchins Mountain King
1971 Gitane Tour de France (original owner)
* 1971 Gitane Super Corsa (crashed)
* rebuilt as upright cruiser
1971 Gitane Super Corsa #2 (sweet replacement)
1980 Ritchey Road Touring (The Grail Bike)
1982 Tom Ritchey Everest
(replacing stolen 1981 TR Everest custom)
1982 Tom Ritchey McKinley (touring pickup truck)
1985 ALAN Record (Glued & Screwed. A gift.)