I would definitely change the rear tires, add a canopy, and make sure the deck is mounted and raised as high as possible. Also add some slime to the tires to avoid flats. possibly inquire about going with a taller tire to raise to mower a little higher off the ground. Suspension seat is a must have, a good chiropractor wouldn't hurt either.
I hope you have really thought this through. You should have went with a mower with a suspension system like Ferris. If it's about speed a Hustler Super Z with flex forks would have been a good choice.
How fast does this mower you have travel? Is it modified for more speed?
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