in my lupo i took out the old bearings. cleaned old grease out. installed redline bearing grease where i had mixed some ws2. i also left the nut little loose. i measured the effect by rising wheel in air and rotate it with your hands.
normal car which brakes arent dragging is 7-15s
if you have good stock setup is 15-25s
modified rear wheel bearings is 25 up to 65 seconds. you can feel the difference i would say. can you see it at the pump is another question. i try to get some results with the A8 project.
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