MCW
Somebody's talking crap here & it ain't the tree!
He did test with all rim sprockets on all sizes. No spurs. 7 and 8 pin on all the chain sizes. The fastest of the lot was 3/8 picco 8 pin
Cool. The 8 tooth picco rims are hard to find. In harder wood my stock 241 is faster with a 7 tooth .325" rim than an 8 tooth but in picco it would pull it easily.