"These carriers provide 5 height positions with a max raise or drop of .8 inches. They also have our proprietary clamping system. This wraps the carrier around the axle and clamps tight to it providing a drastic increase in strength and rigidity as well as pulling heat from the stator. This heat is dissipated through integral heat sinks. They are also GTR compatible if desired. Therefore, these carriers offer four distinct performance advantages:
#1 5 height position settings
#2 Increased strength and rigidity
#3 Improved motor cooling
#4 They are compatible with the stock GT wheel or GTR conversions by way of an included offset spacer.
These carriers are CNC machined from 6061 with the base plates machined from 7075 aluminum. They also include most of the screws in titanium alloy for corrosion resistance and light weight (and they look cool!)."