Here is a used set of Quarter master ultra duty 10 spline quick change gears. They are set # 17. Gears have 25/29 tooth count. They are 4.78 ratio with a 4.12 ring and pinion and 5.63 ratio with a 4.86 ring and pinion. I used these in a vintage dirt race car and they worked good, no issues. Some minor pitting on a few teeth, good used condition. Any questions please ask
