My Gravely is rated at 10mph, and since getting used to a ZTR I've been mowing pretty consistently at about 8mph without any uncut stragglers(I'm one who doesn't believe in running ANY machinery at it's maximum speed for extended periods...I can justify short bursts on real even terrain, but not just "pedal to the metal" constantly). Now that I've installed a mulch kit(because of the extremely mild & wet summer we have had in middle TN making the grass grow fast & thick resulting in excessive clippings), I've had to slow down a bit to get the desired effect of mulching. I'm now probably running at about 6mph, which on a 1.5-2.0 acre lot doesn't take that much longer and I must say the cut I made this past weekend(first time since I installe the Gravely mulch kit that the grass was REALLY dry from 3-4 consecuting sunny days with temps in the 80's) I am ecstatic about the performance of the Gravely mulch kit. BARELY any clippings underneath the deck when finished and following the 1/3 rule(cutting 1/3 of the total uncut height of the grass) the fine layer of clippings pushed back into the cut area cannot be seen at all....but seem to give somewhat of a "striping effect" look to the yard(from cutting different directions each pass and the vague tire marks). I want to get the Gravely hex striper kit but just the mulching kit alone makes my yard look MUCH better than when I was cutting with the OEM blades and side-discharging. I'm gonna have to post some pics in the "Striping, Gotta Love It" thread just so you guys won't think this ole Gravely fanboy is just blowin' smoke:0)