From our team's experience we have tested and/or used virtually every aftermarket gearset out there. Our conclusion is that these gears are the absolute go to option if Siegeteks are out of budget or overkill for the project. Constructed from heat treated steel alloy, Rocket (otherwise SHS OEM) gears have the potential to last without failure if used and installed correctly. While we do our best to inspect each batch of Rocket/SHS gears we receive; often defects and failures are upfront if they occur and replacement gears are cost friendly (especially being purchased individually from us). Compared to gears that may or will fail at even over $50-$90 price points; we strongly recommend these gears if Siegeteks are out of the question.