Originally Posted by
F_ME
With a 60T spur you should have more speed down the straight not less. I suspect you have a worn out diff spring. Install a FT V2 diff spring and this should resolve any slipping issues.
Stock hub bearings do not last long, especially if your wheels are not balanced well. Check your hub and diff bearings frequently. I have replaced all of mine with Avid ceramic bearings and all is good.
Which Avid bearings did you get? The Metal ones?
Makes sense on the Spur, I don't what I was thinking. Going down in teeth will make it spin faster.