Originally Posted by Tseta
First, the bearings for both setups are commonly available from industrial bearing suppliers. No need to pay the KTM prices.
Maybe so, but from my bearing supplier the double-row angular contact bearing is still 5 times the price of a normal deep-groove ball bearing.
Given the issue with contamination, I would venture to suggest there is no marked difference in life or performance, merely price. The accountants have finally won!