Schacht-Reeves Spinning Ratios

Note: Schacht-Reeves wheels cannot use the same whorls as other Schacht spinning wheels. They have their own set of whorls.

Whorl Large Groove Small Groove
Slow 9.5:1 12:1
Medium 14.5:1 18:1
Fast 20:1 24:1
High 27.5:1 30.5:1
Super High 34:1 38.5:1