Make that 240mm versus 228mm stock...and unless you have the power, its kinda overkill, what motor are you running? Javad In a message dated 6/13/2001 7:49:39 PM Pacific Daylight Time, spokes at mail.the-wire.com writes: << Advantages of the 20V clutch? Well, 270mm's over 240mm stock. More friction more better... >>