Polaris RZR RS1 8" Portal Gear Lift

Gear Down and Go Big
SuperATV’s GDP 8” Portal Gear Lift for the Polaris RZR RS1 is geared down so you can go big. It gives you a lift and a 45% gear reduction in one box. Get the clearance to run bigger tires and the torque you need to turn them. The lift and gear reduction are in the hub, so they maintain suspension geometry and reduce drivetrain stress. With huge clearance, huge torque, and optional billet aluminum housings, you can install monster tires to take your torqued-out single-seater anywhere.

Perfect for Mud
With 8” portals and a 45% gear reduction, you get clearance for huge tires and a massive boost in torque. It’ll turn monster tires like they’re stock. Your RS1 will be a single-seater mud monster that can’t be stopped. Now the challenge is finding a mud hole tough enough for you.

Perfect for Rocks
Get tons of torque to crawl over any rock or boulder you can find by installing an 8” portal box with a 45% gear reduction. With that much power, rock shelves will feel like speed bumps and boulders feel like pebbles. With 8” of clearance, you can run monster tires and crawl through any rock garden you find.

Learn more about how tire size and gear reduction can unleash your machine’s potential.

Better Gears
Our gears are precision ground and made with 9310 billet steel alloy. They’re designed to take all the torque and abuse you can give them without chipping teeth or blowing up. Our precise design and manufacturing mean they’re cool and quiet even when you’re hammering down the throttle in the mud hole.

Stronger Housings and Backing Plates
We make our housings stronger by design—period. Nobody has more experience designing portals than we do. Whether you go with cast or billet aluminum, you’re getting a kick‑ass housing built for unmatched strength and reliability, and we’ve got riders on the trail who prove it every weekend. Pair that with our 5/16” backing plates made from an advanced steel alloy that’s stronger than chromoly, and you’ve got the toughest, most unbreakable setup in the world.

• Our housings are reinforced for gear retention and optimized for oil flow
• Advanced steel alloy backing plates are stronger than chromoly
• Ultra-strong integrated rear hub backing plates—no more failure-prone aluminum hubs
• 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 and Seals
Whether you go with cast or billet, both housings use:

• Advanced gaskets with excellent oil resistance and a lower deterioration rate than Kevlar gaskets
• Rubber O-rings that completely seal the housings
• A sealed input gear and double-lipped output seal
• 100% sealing coverage throughout so you can forget about oil leaks

Bearings That Rock
Our gears are only as strong as the bearings that hold them, that’s why we use a double-angular contact bearing. It’s designed to take huge hits from every direction without wearing prematurely. It’s the battle-tank of bearings. Built for battle components make GDP the best.

Universal Hubs and Slotted Rotors
Our precision-ground, stainless steel slotted rotors stay cool to give you the braking power you need when you need it. They come with 4/156, 4/137, 4/115, and 4/110 bolt patterns and lugs so you can use wheels from just about any side-by-side. We invented the tapered output shaft that our hubs attach to, which provides a more secure lock that won’t wobble or wear over time.

You Need to Reinforce Your UTV with a Frame Stiffener
An 8” portal kit is a heavy-duty piece of hardware for heavy-duty machines, and as awesome as the Polaris RZR RS1 is, it’s not quite up to snuff. That’s why a frame stiffener is required. We know—we’ve hit enough bumps to know that bending a stock frame can happen. Don’t do it. Get a frame stiffener.

8” Portal Gear Lift Includes:
(4) Assembled portal hub boxes complete with 9310 gears, seals, output shaft, advanced 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
(2) Steel steering arms
Extended brake lines
All required hardware, including recessed castle nut socket
Frame stiffener (optional)

Polaris RZR RS1 Portal Gear Suspension Recommendations
Max Tire Size	Required Suspension Setup with 8" Portals
40"	Stock
42"	1.5" Forward Front A-Arms
44"	1.5" Forward Front A-Arms and 3-5" Lift Kit
50"	7-10" Lift Kit
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

• Available with billet or cast aluminum housing
• Cool, quiet, precision ground gears made from 9310 alloy billet steel
• 1.5 in. forward and rear offset
• Increases width by 4 in. per side (8 in. total)
• 1.5 in. diameter 4340 hardened steel driveshaft
• Housings use advanced gaskets and rubber O-rings that don’t let anything through
• Universal hubs can be set up to work with the following bolt patterns: 4/156, 4/137, 4/115, and 4/110
• Gear reduction reduces stress on your drivetrain

• Polaris RZR RS1 : 2018-2021

Wheel Requirements:

• 22" or larger wheel required
• Wheels cannot exceed 5" backspacing
• Wheels need to have a center hole of at least 3.25" (82.55mm) or require a 1” wheel spacer