High Lifter 4 Portal Gear Lift Polaris Ranger XP 1000 / Crew Attack even some of the most difficult terrain with the High Lifter's Portal Gear Lift . Available in both single or double idler, it boasts a 15 - 30 gear reduction ability that not only distributes weight but also minimizes wear on machine parts prone to damage, ensuring your UTV / Side-by-Side reigns supreme on the trails. The gear reduction also extends brake life by enhancing engine braking, thereby reducing the strain on your rotors. The additional lift granted by this gear lift enables the usage of oversized wheels and tires without compromising stability or exerting undue pressure on drivetrain components. Features: Each kit includes 4 portal boxes Forged Gear Boxes Strongest boxes on the market because forging produces a tougher piece of metal Forging is stronger than both cast and billet aluminum Competitors use cast aluminum and billet aluminum boxes These portal boxes are extremely robust and give you more worry-free miles than any other portal Gear Box Venting Box design offers a plug for venting with an optional easy to install kit Vent kits allow an advantage of cooling which reduces early deterioration of the gaskets and seals Gasket Material and Design High density Kevlar fiber gaskets plus no additional sealant is needed Gasket material is creep resistant plus oil and coolant resistant Seals Two oil seals on the spindle shaft for 100 more sealing area Dual seals prevent water intrusion and oil leaks True triple seal on the input shaft which includes a wiper seal that provides a significant extra layer of protection Backing Plate 5/16 steel plate with Bent flanges for strength and durability Welded gusset brackets and designed to factory off-set Works with all control arms that are built to factory hub specifications Rotors Precision ground stainless steel rotors (this is a big deal for brake performance) Access holes for ease of assembly and disassembly Slotted rotor allows for heat dissipation and cooling Gear Profile Alloy steel heat treating process increases overall internal and external strength CNC precision ground machining ensures excellent fitment and increased strength Controlled gear lapping for ease of installation and a quieter performance Tire Fitment: Largest Tire with Portal: 33 Largest Tire with Forward Arms: 35 Stated tire fitment guide is a general fitment and is in no way guaranteed. Tires and lifts vary by manufacture and tire fitment can be affected by other modifications. Always verify your brand of tires, lift, and other modifications prior to making a buying decision. Wheel Requirements: 14 or larger 14 factory wheels must run 1 spacer 14 & 15 can not exceed 4-1/2 backspacing 16 & larger can not exceed 5 backspacing