How hot do they get?
I would normaly use a grease like
this one
The temperature range for this grease is -22F to 250F
But could I get away with
this one instead?
It is rated for -58F to 230F and has much better friction properties. Since my daily commute is only 7 miles and we get attrociously cold winters, my bearings dont get usually very hot. However I sometimes do couple hours highway trips in the summer too, but the ambient temperature never gets really higher than 90F.