The Altoz XP is an unmatched combination of a powerful and efficient engine, responsive commercial Hydro-Gear transmission, and 24" tires that make this a workhorse commercial zero turn mower that maximizes your ROI. XP HD Models - The large cutting deck features heat dissipating aluminum spindle housings that cut more in less time and delivers extreme strength and durability for all-day use. A variety of Altoz accessories complement the Aero Deck including lawn striping kits, operator-controlled discharge covers, mulching blades and large collection systems for easy spring and fall clean-ups.