Guys, please read this and take it on board. today i had a very lucky escape to what could have been a very hard hit, while going through Hawthorn bend on the Brands GP circuit i had a rear upright failure, the mid corner speed is well over 1oo MPH and i nearly lost the out side rear wheel!. Lesson please take a look at the age of your upright, this could have been a hell of a lot worse.
You are correct it was the hub that fail, by upright I was referring to the up right assembly, you can see its sheared off. As for hours of use very hard for me to say as I did not purchase the car from new, apologies for the poor picture adrenalin rush when changing in out, wanted to get back out.