Why You’ll Love It
4” Portal Lift adds ground clearance directly at the hubs 15% or 30% Gear Reduction adds torque and relieves drivetrain stress Selectable Idler Setup lets you choose dual- or single-idler gearing Cast or Billet Housings let you choose the construction that fits your build Limited Lifetime Warranty protects your purchase
Take Your HD10 to the Next Level with GDP Portals
Boost your Can-Am Defender HD10 with SuperATV’s 6” Portal Gear Lift. You’ll get 6” of lift, more torque, and the clearance to run bigger tires. Pick a 15% or 30% gear reduction, depending on your riding style. And for maximum strength, upgrade from cast to billet aluminum housing. To really take it to the next level, upgrade to our dual idler gears.
What Is a Dual Idler?
Perfection doesn’t happen overnight. That’s why our dual idler gear portals are built differently. By adding a second idler gear in the portal box, the load spreads over more surface area, giving you more reliable torque transfer and a stronger gear set overall. Of course, two gears are useless if they don’t mesh perfectly—that’s why we use precision CNC grinding and ultra-strong 9310 steel.
Tough Enough for Any Terrain
GDP Portal Gear Lifts are made for every riding style. Dunes, mud, trails, or work—there’s a setup that fits. Choose a 15% gear reduction for speed or a 30% for max torque and big tires. Add dual idler gears for serious strength that can handle whatever you throw at it.
Portals Protect Your Drivetrain
Instead of forcing the entire drivetrain to handle the burden of turning massive tires, GDP portals handle gear reduction at the hub. This significantly reduces wear on important parts such as your axles, differential, prop shaft, and transmission.
Built Tough with Aluminum and Steel
When things get rough, these portals keep going. The cast and billet aluminum housings are built strong, and the advanced steel alloy backing plates back them up with serious durability.
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
- Add a Frame Stiffener
While portals and big tires boost performance, they can increase stress on your frame. Make your suspension rock-solid by pairing your new HD10 portals with a SuperATV Frame Stiffener.
Customer Service That Can’t Be Beat
If you’re still sorting out what you need, we’re here to help. Our portal experts are just a call away and ready to get you set up with what works best for you.
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 stainless steel slotted rotors with lugs
(4) Specialized steel alloy backing plates
(4) Steel caliper mounting plates
(2) Steel steering arms
Extended brake lines
All required hardware, including recessed castle nut socket
Frame stiffener (optional)
Max Tire Size Recommendations for 4” Portal Gear Lift
Max Tire Size Required Suspension Setup with 4" Portals
26" Stock
27" 3" Lift Kit
28" to 34" 2" Forward Offset A-Arms
28" to 38" 6" 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
Frequently Asked Questions (FAQ)
Is a 4-inch portal gear lift better than a standard lift kit for a Can-Am Defender 4?
Yes. A 4-inch portal gear lift gives you both ground clearance and torque—not just height like a standard lift kit. By moving the gear reduction to the hub, portals reduce stress on axles, differentials, and the transmission while allowing you to run larger tires with confidence.
Will this portal gear lift fit my Can-Am Defender 4 or Defender MAX?
This portal gear lift is machine-specific and engineered to fit select Can-Am Defender and Defender MAX models listed in our fitment guide. Always check the fitment tab on the product page to confirm compatibility with your exact year and model.
How hard is it to install a SuperATV 4-inch portal gear lift?
Installing portals is more involved than a basic lift because they replace the hubs and integrate gear reduction. We include detailed step-by-step instructions, extended brake lines, and all required hardware to make installation as straightforward as possible for experienced DIY riders.
What gear reduction options are available and how do I choose one?
We offer 15% and 30% gear reduction options. A 15% reduction maintains higher trail speed with added torque, while 30% is ideal for heavy loads, mud riding, or turning larger tires that require more low-end power.
How much wider does the Defender get with this portal gear lift installed?
This 4-inch portal gear lift increases width by approximately 4 inches per side, giving your Defender a wider, more stable stance. The added width improves control when running larger tires or navigating uneven terrain.
What makes SuperATV GDP portals stronger than other portal lifts?
GDP portals use precision-ground 9310 alloy steel gears and offer a dual idler configuration that spreads load across more surface area. This engineering delivers smoother operation and maximum strength under extreme torque, backed by years of real-world testing.
Do I need special wheels or backspacing for this portal gear lift?
Yes. Wheels must be at least 14 inches in diameter and cannot exceed 4.5 inches of backspacing. Following these requirements ensures proper clearance, correct steering geometry, and long-term reliability of the portal system.
Features
- Available with billet or cast aluminum housing
- Dual idler gear configuration maximizes strength
- Cool, quiet, precision ground gears made from 9310 alloy billet steel
- 1.5 in. diameter 4340 hardened steel drive shaft
- Housings use advanced gaskets or 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
- Dual idler gear configuration adds a 3/4” front and rear offset—1.5” total extension
- Lighter than the competition
Fitment (per SuperATV)
Kit 1 Will Fit
- Can-Am Defender HD 10 : 2016-2019
- Can-Am Defender HD 10 DPS : 2016-2021
- Can-Am Defender HD 10 XT : 2016-2021
- Can-Am Defender HD 10 XT Cab : 2016-2021
- Can-Am Defender HD 10 XTP : 2018-2021
- Can-Am Defender HD 10 Mossy Oak : 2018-2021
- Can-Am Defender HD 10 PRO : 2020-2021
- Can-Am Defender MAX HD 10 : 2017-2021
- Can-Am Defender MAX HD 10 DPS : 2017-2021
- Can-Am Defender MAX HD 10 XT : 2017-2021
- Can-Am Defender MAX HD 10 XT Cab : 2017
Kit 2 Will Fit
- Can-Am Defender HD 10 Limited : 2020-2021
- Can-Am Defender HD 10 XMR : 2018-2021
- Can-Am Defender HD 10 XT Cab : 2018-2021
- Can-Am Defender MAX HD 10 Limited : 2020-2021
- Can-Am Defender MAX HD 10 Lone Star Edition : 2018-2021
- Can-Am Defender MAX HD 10 XT Cab : 2018-2021
- Can-Am Defender MAX HD 10 XMR : 2019-2021
Kit 3 Will Fit
- Can-Am Defender HD 10 : 2022+
- Can-Am Defender HD 10 DPS : 2022+
- Can-Am Defender HD 10 Limited : 2022+
- Can-Am Defender HD 10 Mossy Oak : 2022+
- Can-Am Defender HD 10 PRO : 2022+
- Can-Am Defender HD 10 XMR : 2022+
- Can-Am Defender HD 10 XT : 2022+
- Can-Am Defender HD 10 XT Cab : 2022+
- Can-Am Defender HD 10 XTP : 2022+
- Can-Am Defender MAX HD 10 DPS : 2022+
- Can-Am Defender MAX HD 10 Limited : 2022+
- Can-Am Defender MAX HD 10 Lone Star Edition : 2022+
- Can-Am Defender MAX HD 10 XMR : 2022+
- Can-Am Defender MAX HD 10 XT : 2022+
- Can-Am Defender MAX HD 10 XT Cab : 2022+
Wheel Requirements
- 14” or larger wheel required
- Wheels cannot exceed 4-1/2” backspacing
- Not compatible with dual beadlock wheels
- Wheels need to have a center hole of at least 3.25" (82.55mm) or require a 1” wheel spacer
Installation instructions (PDF)
Ships free from SuperATV. Price is SuperATV's current price.
