Get Maximum Performance in Your HD11 with GDP Portals
Your Can-Am Defender HD11 is built to work hard and player harder, but there’s still room for improvement. SuperATV’s 8” GDP Portals are the ultimate upgrade. You get 8” of lift with a built-in gear reduction. This gives you more torque, better ground clearance, and the ability to run larger tires. Choose between a 45% and 60% gear reduction with a billet or cast housing for maximum power. Take it over the top with SuperATV's dual-idler configuration that delivers ultimate strength with a 60% or 70% gear reduction.
What is a Dual Idler?
Perfection takes time. After years of research and development, SuperATV has made its dual idler gear portals unlike any other. By placing a second idler gear in the portal box, the load gets spread over twice as much surface area for more reliable torque transfer and the strongest gear set you can get. Two idler gears don’t do a thing if they’re not mated perfectly, though. Precision CNC grinding ensures these do. The gears are made from the industry’s toughest 9310 steel alloy. Didn’t think dual idlers mattered? With GDP’s quality and experience, they finally do.
Take on any Terrain
The best part about SuperATV's Defender HD11 8” GDP Portals is that you can choose a set that are tailored for your riding style. A 45%, 60%, or 70% gear reduction all give you serious power. You just have to pick one depending on how much torque and speed you’re looking for. You’ll get the power you need to take on rock crawling, the strength to spin oversized tires, and the control to push through deep mud with ease.
Protect Your Drivetrain with GDP Portals
SuperATV designed its Defender HD11 GDP Portals to put the gear reduction directly in the hub. This keeps your differential, prop shaft, and transmission safe from extra wear and tear. Plus, they keep the same suspension angle as stock, so your axles won’t overextend.
Strength that Can’t be Beat
Constant repairs are the last thing anyone wants. GDP Portals are engineered for durability, with a cast or billet aluminum housings and tough 5/16” backing plates made from advanced steel alloy. They’re designed to withstand hard use while the lifetime warranty gives you more confidence to ride as hard as you want.
The 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—SuperATV knows because it tested them
Advanced Gaskets, Seals, and Bearings
The 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
Big tires and portals definitely take your Defender HD 11 to the next level, but they also put extra stress on your frame. A SuperATV Frame Stiffener helps reinforce your suspension so you can ride harder with added confidence.
Top-Tier Customer Service
Picking the right portals doesn’t need to be complicated. The customer service team is more than happy to help. Give us a call today and SuperATV will point you in the right direction to get you ready for your next ride.
Can-Am Defender HD11 8” Portal Gear Lift Includes:
(4) Assembled portal hubs 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
(4) Shims
(16) Brake line clips
Extended brake lines
All required hardware, including recessed castle nut socket
Frame stiffener (optional)
Max Tire Size Recommendations for 8” Portal Gear Lift
Max Tire Size
Required Suspension
38"
Stock suspension
If you need help figuring out which gear reduction is right for you, check out SuperATV's portal gear reduction calculator .
Max tire sizes are measured at full compression and full turn. The given tires sizes are the largest SuperATV fits 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
Features
Available with billet or cast aluminum housing
Dual idler gear configuration option maximizes strength
Includes pre-installed double bonded bushings
Cool, quiet, precision ground gears made from 9310 alloy billet steel
1.5 in. forward and rear offset
1.5 in. diameter 4340 hardened steel drive shaft
Housings use 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
Fitment information
Can-Am Defender HD 11 Limited : 2026+
Can-Am Defender HD 11 XMR w/Half Doors : 2026+
Can-Am Defender HD 11 XT : 2026+
Can-Am Defender HD 11 XT Cab : 2026+
Can-Am Defender MAX HD 11 Limited : 2026+
Can-Am Defender MAX HD 11 Lone Star : 2026+
Can-Am Defender MAX HD 11 Lone Star Cab : 2026+
Can-Am Defender MAX HD 11 XMR w/Half Doors : 2026+
Can-Am Defender MAX HD 11 XT : 2026+
Can-Am Defender MAX HD 11 XT Cab : 2026+
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
