I had two flywheels and two used up clutches as I was sorting parts to re-do my 235 w/3spd. One was 10 inch, the other 11 inch. Since they both fit, I ordered an 11 inch clutch, thinking more is better since I will be towing. It's great having that bigger disc, but it takes three men and a small boy to mash the pedal and move the springs on the plate. I'll be the guy with an oversized left leg soon!