***Now Narrower Width!! ***
All transmissions now come fully assembled.
Carbon Fiber Side Plates!
Heat treated chromoly gears!
5:1 gearing, plus a 48 Tooth, 48 pitch spur gear.
Uses 48 Pitch pinon gears.
12T pinion = 20:1 transmission ratio, or 75:1 final (AR44), or 67.5:1 final (AR44 w/OD gears), or 58.4:1 (AR60)
18T pinion = 13.33 trans ratio, or 50:1 (AR44), or 45:1 (AR44 w/OD gears), or 38.9:1 (AR60)

Personally, I like a 40 to 55:1 final drive ratio for most comp rigs or scalers. Crawlers that is, rock bouncers or bashers will want more speed.

What is a good pinion to start with? An 18T (48P) pinion is a good starting point for typical non-portal crawlers, then adjust to your personal preference, and your specific setup. If you are running a fast motor or heavy rig, maybe 15T. If you are running a very light rig or slow motor, or want more speed maybe 20 or 22T. Portal rigs perhaps a 26 tooth starting point (46.1:1 final drive in a Capra with 20/15 overdrive gears).