Gen 3 Portals Are Geared for All Gen 3 portals for the Polaris RZR Pro XP are geared for all, and that means we™re not putting anyone in a box. Choose a 15% or a 30% gear reduction to match your ride style. Love going big and going deep? Get 30% gear reduction for maximum torque and bigger tires. Prefer trail riding? Get a 15% gear reduction. Need ultimate strength? Opt for our dual idler configuration. The choice is yours. Ride your way wherever you want. Let GDP take you where no one else can go. What is a Dual Idler®? Perfection takes time. After years of research and development, we™ve made our dual idler gear portals unlike any other. By placing a second idler gear in the portal box, the load gets spread over twice as much surface area for more reliable torque transfer and the strongest gear set you can get. Two idler gears don™t do a thing if they™re not mated perfectly, though. Precision CNC grinding ensures ours do. Our gears are made from the industry™s toughest 9310 steel alloy. Didn™t think dual idlers mattered? With GDP™s quality and experience, they finally do. Perfect for All Kinds of Rides Love mud? The deeper you go, the more you™ll realize how much torque a 30% portal gear reduction really gives you. Plus that extra ground clearance will keep you from getting swamped. Portals plus mud just makes sense. For trails, desert, and dunes, check out our 15% gear reduction that maintains a higher top speed while still giving you punchy torque. A Gear Reduction That Protects Your Drivetrain Portals have their gear reduction right in the hub. That makes this gear reduction reduce the stress on your axles, differential, Prop shaft, and transmission. You can ride harder than stock and cause less wear. It™s a win-win, and a recipe for fun. Stronger Housings by Design You think you can find better housings that GDP housings? Think again. Our housings are stronger by design. We know what makes a housing break and why. That™s why whether you choose cast or USA-made 6061 billet aluminum with a dead sexy CNC-machined finish, you™re getting a kick-ass housing with unmatched strength and reliability. Plus, they™re supported by our unstoppable backing plates made with an advanced steel alloy. Our housings are reinforced for gear retention and optimized for oil flow Advanced steel alloy backing plates are stronger than chromoly Enhance with Portal Blood ”gear oil formulated for GDP Portals There are no gimmicks and no vents because vents do more harm than good”we know because we tested them Advanced Gaskets, Seals, and Bearings Our portals use: Advanced gaskets and O-rings with excellent oil resistance and low deterioration rates A sealed input gear and double-lipped output seal 100% sealing coverage throughout so you can forget about oil leaks Double-angular contact output bearings to prevent premature wear Roller idler and drive bearings to maintain perfect gear meshing Complete the Package with a Frame Stiffener Portals and monster tires are fun, but they can place additional stress on your machine™s frame. To make your suspension bulletproof, don™t forget to add a SuperATV Frame Stiffener when you check out! Top-Rated Customer Service Still need a little help getting exactly what you need? We™ve got a dedicated team just for portal support. Give us a call so we can get the perfect set of portals in your hands today. 4" Portal Gear Lift Includes (4) Assembled portal hub boxes complete w/ 9310 gears, seals, output shaft, gaskets, and thrust bearings (4) Universal hubs and precision-ground stainless steel slotted rotors w/ lugs (4) Specialized steel alloy backing plates (4) Steel caliper mounting plates (4) Caliper mounting plate shims (dual idler configuration only) (4) Caliper adapter plates (2) Steel steering arms (2) Aluminum hub adapters Extended brake lines Steering stop brackets (single idler configuration only) All required hardware including recessed castle nut socket Frame stiffener (optional) Polaris RZR PRO XP Portal Gear Reduction Recommendations Max Tire Size Required Suspension Setup with 4 Portals 34" Stock 34" 3" Lift Kit 36" 1.5" Forward Offset A-Arms 36" 1.5 Forward Offset A-Arms and 3 Lift Kit If you need help figuring out which gear reduction is right for you, check out our portal gear reduction calculator. Max tire sizes are measured at full compression and full turn. The given tires sizes are the largest we fit without rubbing. With minor trimming or a small amount of rub, larger tire sizes can be used. Patent # 11,299,042 Patent # 11,318,787