Polaris RZR Trail 900 4" Portal Gear Lift


SKU: Item-PGH-1-44-152#900 Categories: , , Tag:
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Gen 3 Portals Are Geared for All
When it comes to side-
by-sides, one size does not fit all riders. Your machine should be as unique
as you are, and we kept that in mind when designing this GDP 4” Portal Gear
Lift. It adds both a lift and a gear reduction to your Polaris RZR Trail 900!
You get to choose how much of a reduction you get (15 or 30%) and your
preferred style of housings (cast or billet aluminum). No matter what options
you go with, one thing’s for sure—your ride will never be the same.

GDP—the Most Trusted Name in Portals
More riders turn to
SuperATV for their portal needs than anyone else in the industry. That’s
because we know our stuff. We’ve invested more time and money in designing
portal gear lifts than any other manufacturer in the industry. Thanks to
industry-leading technology and countless hours of field and lab testing,
we’re able to deliver exactly what you need to take your ride to the next

Perfect for Mud
Some things are just
made to go hand in hand—peanut butter and jelly, biscuits and gravy, and
portals and mud, to name a few. You haven’t experienced mud in your side-by-
side until you’ve done it on a portal gear lift. The 4” lift keeps you from
getting swamped and gives you room for bigger tires, and the torque boost
makes cutting through thick mud a piece of cake.

A Gear
Reduction That Protects Your Drivetrain

Portal gear lifts put
the gear reduction directly in the hub, which is good news for your
drivetrain. This placement greatly reduces the amount of stress placed on your
axles, differential, prop shaft, and transmission. Because portals don’t make
those parts work overtime, they’ll last longer—which saves you money in the
long run. You’re welcome.

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

Gear Material

Good gears keep your portal gear lift running
flawlessly, so we use the best. Our portals contain premium, top-of-the-line
gears made from a strong 9310 alloy steel. They’re precision ground to ensure
perfect mating and quiet operation. So go ahead and get wild—these gears will
deliver a smooth ride no matter what.

Stronger Housings by

Another crucial component of a portal gear lift is the
housing. It’s what keeps everything safe and protected on those rough rides.
Quality housings aren’t easy to manufacture, but lucky for you, we’ve done our
research. We’ve been making portal housings for years and now we’re proud to
give you two unbeatable options: cast or USA-made 6061 billet aluminum with a
sleek CNC-machined finished. You can’t go wrong either way.

  • Our
    housings are reinforced in all the right places
  • They’re built with
    better oil flow and gearing forces in mind
  • There are no gimmicks and
    no vents because vents do more harm than good—we know because we tested

The Strongest Portal Backing Plates You Can

Like everything else related to GDP portals, our backing
plates are anything but standard. They’re made of an advanced steel alloy
that’s specialized for use in ultra-high force applications. With a thickness
of 5/16” and strength more impressive than chromoly, these backing plates are
prepared for anything.

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

Bearings That Rock
Our bearings keep your
portal gear lift running smoothly through all conditions. Incredibly strong
roller bearings hold the idler gear in place, absorbing all that internal
pressure. And because the output bearing takes the most force, we utilize a
double-angular contact bearing. All in all, these bearings are designed to
keep your portals running for miles without fail.

Hubs and Slotted Rotors

All GDP portals utilize precision-
ground, stainless steel slotted rotors. They’re designed to stay cool and
deliver the braking power you need, exactly when you need it. Our universal
hubs come with 4/156, 4/137, 4/115, and 4/110 bolt patterns and lugs, allowing
you to run just about any side-by-side wheel under the sun. We also invented
the tapered output shaft that attaches to our hubs. It gives you a more secure
lock that won’t start to wobble over time.

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.

you’re not sure which gear reduction is right for you, check out our portal gear
reduction calculator
. Just plug in your original tire size, new tire size,
and top speed to find out what a reduction can do for your ride.

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
(2) Steel steering arms
Extended brake lines with parking brake and brake cable brackets
All required hardware including recessed castle nut socket

Patent # 11,299,042


  • Available with billet or cast aluminum housings
  • Cool, quiet,
    precision-ground gears made from 9310 alloy billet steel
  • Increases
    width by 4 in. per side (8 in. total)
  • 1.5 in. diameter 4340 hardened
    steel driveshaft
  • Housings use advanced gaskets that don’t let
    anything through
  • Universal hub fits all major bolt patterns
  • Gear reduction reduces stress on your drivetrain
  • Weighs 194 lb.
    total, which is 50+ lb. lighter than the competition

Wheel Requirements:

  • 14” or larger wheel
  • Cannot exceed 5” backspacing


  • Polaris RZR Trail 900 Sport : 2021+
  • Polaris RZR Trail 900
    Premium : 2021+
  • Polaris RZR Trail 900 Ultimate : 2021+

NOTE: Wheels need to have a center hole of at least 3.25″
(82.55mm) or require a 1” wheel spacer.

Additional information

Portal Housing Material

Billet, Cast

Portal Gear Reduction

15%, 30%