4340 chromoly inner hub gears. With stronger axles than ever before, the next weak link has become the inner hub gears. When the hub gear breaks it strips the splines on the Burfield. Then the Burfield needs to be replaced. This costs a lot more than upgrading your hub gears. We have available a bullet proof inner hub gear to solve this problem.

We also have them for IFS hubs for the same price. This will convert them over to straight axle hubs.