Here is a used set of 10 spline quick change gears. They are set # 25. 20/22 tooth. They are 4.53 ratio with a 4.11 ring and pinion and 5.34 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. I used these and they worked well. Any questions please ask