Originally Posted by beemerfan

The critical dimensions of these axles are exactly the same as the electric TC3 parts and they will work fine using only stock parts. The only difference is the threaded portion of the axle is slightly longer, which would allow you to use a thicker hex or spacers to widen your car a little if you want.

However, I haven't noticed any performance advantage to using them. They weigh more than the plastic or aluminum. My personal preference is to use the stock plastic axles. Not just to reduce weight but when plastic bends, it also bends back. Aluminum wears faster and when both steel and aluminum bend, they stay bent causing a lot of extra vibration if you don't replace them. I only race 21.5 and 25.5 classes though. So unless you need the extra durability of steel or a wider axle, these probably aren't worth the extra cost.