On this M2 spindle topic, there is one thing not yet mentioned, that IMO becomes a shortcoming, and that is the typical wilwood M2 alum hubs. As first noted, a 3000lb+ car on the track, running hot laps, with the related likely brake temps heating the alum hub, is far from ideal, being at 375F? (if I'm reading graph correctly?)6061 has lost nearly half its strength, combined with a non robust bearing already mentioned, ie small outer race diameter, and alum expansion, things cannot be improving. There are of course aftermarket steel hub solutions, but some weight reduction is lost and cost now becomes a factor. twocents

http://www.burnsstainless.com/images/technology/YieldStrength-1.gif

Last edited by jcc; 09/10/16 10:19 PM.
Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.