SkipdiverJohn
Deplorable Brexiteer
- Location
- London
I suppose my, possibly deluded, idea was born from watching Velocipedium on YouTube and watching how he cruises around on his three speeds.
He isn't running anything like standard gearing though. What he does is put on the largest rear sprocket readily available for the SA hub, I believe 23T running to a 46T chainwheel. His rides look easy because he's running ratios that are almost a whole gear step lower than standard. You may have noticed he uses top gear a lot more than most riders of 3-speeds do, because his 3rd gear is only really "2 and a bit"!
If you do that on a 26" wheel bike, your direct drive 2nd gear is 52". Normally you might expect to find a 18T on the back combined with a 46T front, so giving a direct gear of 66".
His top gear is only 69" (i.e. 52" x 1.33 step-up) which means you will soon spin out on a decent flat road with any tailwind. Standard 3-speed Raleigh gearing is a little too high, IMHO, but only a little. I'd say 19T/46T on a sports model with cable brakes and 20T/46T on a rod-braked chaincase model is probably optimal, in that it gives you a bit better acceleration and gradient performance without limiting your clear road speeds.
My own Raleigh 3-speed is geared 19T/46T, giving me a 63" 2nd gear. I suspect it's original, and may have been standard on the enclosed chaincase rod-braked models, because they weigh more. Mine weighs 40 lbs not 35, and you feel any climbs.