Polaris RZR RS1 4" Portal Gear Lift

Gen 3 Portals are Geared for All
SuperATV’s GDP 4” Portal Gear Lift for the Polaris RZR RS1 is Geared for All. What do we mean by that? Our 4” portal lift is available with 15% or 30% gear reductions and cast or billet housings. That means you can optimize your ride to fit your style.

Perfect for Mud
Get a 30% gear reduction and start flingin’ mud. With a massive boost to torque, you can turn bigger tires that chew through the thickest bounty holes. When you gear down and go big, your machine will turn into a mud monster. Plus, with a 30% gear reduction you can still use it on the road and tear up trails and rocks.

Perfect for Rocks
Put 4” portals and a 30% gear reduction on your machine and get the torque you need crawl over rocks like they’re not even there. You’ll have the clearance to get over anything without scratching up your skid plate, and you’ll have room to run bigger tires. These portals are built for boulders.

Perfect for Trails
Get 4” portals and a 15% gear reduction on your Polaris RS1 and take on the trail less traveled. You’ll keep that high speed and leave your friends in the dust when hit a hill or dirt shelf. It’ll bring out your UTV’s true power.

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 for high strength and high speed. That means they’re cool and quiet even when you’re hammering down the throttle on the road, and they have strength to withstand every ride.

Reinforced Housings and Ultra‑Tough Backing Plates
Our housings are built with strength at the forefront—no shortcuts, no guesswork. With more portal design experience than anyone else in the game, we know exactly how to engineer a housing that can take real abuse. Choose cast or billet aluminum and you’re still getting a rugged, trail‑proven setup that riders trust to hold up when it counts. Add in our 5/16” backing plates crafted from a high‑performance steel alloy that outmuscles chromoly, and you’re running a setup that’s practically impossible to break.

• 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
• A sealed input gear and double-lipped output seal
• 100% sealing coverage throughout so you can forget about oil leaks

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 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
(4) Caliper adapter plates
(2) Steel steering arms
Extended brake lines
All required hardware, including recessed castle nut socket

Max Tire Size Recommendations for 4” Portal Gear Lift
Max Tire Size	Required Suspension Setup with GDP Portals
34"	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.

Patent # 11,299,042