Polaris RZR Pro S 8" Portal Gear Lift

Turn Your RZR Pro S into a Mud Beast
If you’re ready to blast through the nastiest, thickest mud, you need SuperATV’s Polaris RZR Pro S 8" Portal Gear Lift. It gives you the ground clearance to rip through deep muck without getting bogged down. And with your choice of a 45%, 60%, or 70% gear reduction, plus billet or cast aluminum housings, you can turn your RZR into the ultimate mud machine and rock massive tires.

What’s a Dual Idler?
We spent years perfecting our dual idler gear portals to give you unbeatable strength and performance. These CNC-ground idler gears provide flawless torque transfer and reliable power, so you can push hard without worry. Made from ultra-durable 9210 steel alloy, these gears are built to last. With GDP’s unbeatable engineering, your RZR gets the hardcore upgrade it deserves.

Choose Your Power: 45%, 60%, or 70% Gear Reduction
Big tires don’t just look mean—they turn mud pits into playgrounds. Our 8” GDP Portals give you the space and gear reduction you need to throw on massive tires without killing your performance. But big rubber needs big power. That’s why we offer 45%, 60%, or 70% gear reductions to keep your ride ripping. The right reduction helps restore lost torque, so you get the best mix of power and performance.

Save Your Drivetrain
With GDP portals, the gear reduction happens right at the hub, meaning less stress on your drivetrain. Your axles, differential, prop shafts, and transmission don’t take a beating just to keep those monster tires rolling. Your machine will thank you.

Built to Dominate
Our GDP portals are designed to take whatever punishment you throw at them. Whether you go with cast or 6061 billet aluminum housings, you’re getting unmatched strength from a battle-tested design. Add in 5/16” advanced steel alloy backing plates, and you’ve got the toughest portals on the market. Does your RZR deserve anything less?

• 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

Best Customer Service in the Industry
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.

8” Portal Gear Lift Includes:

• (4) Assembled portal hub boxes complete with 9310 gears, seals, output shaft, gaskets, and thrust bearings
• (4) Universal hubs and precision-ground stainless steel slotted rotors with lugs
• (4) Specialized steel alloy backing plates
• (4) Steel caliper mounting plates
• (2) Caliper adapter plates (dual idler configuration only)
• Extended brake lines
• All required hardware, including recessed castle nut socket

Max Tire Size Recommendations for 8” Portal Gear Lift
Max Tire Size	Required Suspension Setup with 8" Portals
42"	Stock
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.