Vorshlag-Fair
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Well this is our 4th replacement set in 4 years... but the car has not stayed the same in that 4 years. It rarely stays the same from one event to the next... We started in 2010 building this car around a street tire class in SCCA Autocrossing called STX. We had a max tire width of 265mm and minimum treadwear of 140. We also tracked the car off-and-on in NASA TTB, on the same tires and suspension set-up. It wasn't very fast in that class and the tires were REALLY holding back the car's potential. It made 430 whp back then, just as it does now, but with tires 70/80mm narrower and a whole lot harder compound than what we use now.
We actually re-used the OEM hubs when we installed our first set of ARP wheel studs, back in 2011. Just put a new nut in place and back on they went. We didn't really wear those out until 2012.
I looked it up and it was after our 2nd track event in early 2012, after we had started toying with R-compound tires (305 then 315mm) that the first set failed. So more than 2 seasons on street tires and nothing, then we moved to big gumball tires and they went to crap.
We've done another 3 sets of front hubs since then, and the car has gotten considerably faster. On our home track of ECR the car went from 2:05 range on 265mm street tires to 2:03 laps on 275mm streets all the way to 1:55 times on 315mm R compounds. We haven't even run this track on the current 335/345mm tires yet, but we've been dropping 3 seconds from our lap times from 2013 on the new tires. We're also going to a LOT more track event than we did in 2010-2011, with 25-30 track events a year lately. Not to mention I'm a hack driver and hoon the sh!t out of this car, hehehe....
Some of our accelerated hub wear comes from FRONT BRAKE HEAT, which has been excessive with my driving style, the added speeds aero allows, and the 335mm Hoosier A6 front tires can allow for. The RoadAtlanta crash didn't help the life of the last set, either.
I'm hoping with the 4" brake ducts we can extend the life of the hubs to more than 6-8 months, like we've been seeing lately. But hey, this is a VERY heavy car with VERY high grip levels and VERY hot rotor temps, so this isn't your typical wear rate.
