I've had all 4 forks; Lyrik Ult 160, 36 Fact 160, Zeb Ult 170 and 38 Fact 170. I'm 220 lbs kitted up, and the torsional stiffness of the 38 and Zeb chassis is definitely noticeable but with a significant weight penalty. An extra pound and some change up front certainly is palpable on mellow undulating trails. I prefer the smaller Lyrik and 36 on my trail bikes and the Zeb and 38 on my Enduro. In some conditions you want a bit of flex and deflection; where the trail bike pairs well with the smaller diameter forks, they tend...