Red bands are early ‘60-64. They have superior braking but the axle isn’t threaded all the way so if it stops working the only way to pull it apart is to cut the axle. Top gear is 1:1, low gear is a granny hill climber gear (I can’t remember the exact number). They were for 26” wheel bikes. 18t as I remember. 36 hole.
Yellow band came out in ‘65. Same gearing but has inferior drum braking.
Blue band hubs were for 20” bikes. Same design as the yellow band. Uses a 20t cog and has a 1:1 low gear and a 1.5:1 overdrive (remember, for 20” bikes). 28 hole. You can put blue gears in a yellow shell for a big overdrive on a 26” bike. But the brakes still suck. That’s what I did here.
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