Create the Ultimate Defender HD8 with GDP Portals
Your Can-Am Defender HD8 isn’t a powerhouse until it has SuperATV’s 6” Portal Gear Lift installed. You’ll get 6” of lift and a gear reduction in one package. This means more torque and bigger tires without stressing out your Defender. Choose between 30%, 45%, or 60% gear reduction to match your riding style, and for maximum durability, upgrade from SuperATV's cast housing to its billet aluminum housing. Are you looking for even more power? The dual idler portals are the perfect option for you.
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.
Get the Power to Conquer any Terrain
A gear reduction changes how your ride performs on different terrain. Choose 30% for faster speeds with plenty of torque. If you have larger tires and tackle tough trails, go with 45% to get extra power and control. Construct the ultimate mudder with a 60% gear drop, and maximize its torque by adding dual idler gears.
Protect Your Drivetrain
GDP Portals relocate the gear reduction to the wheel hubs instead of the transmission. This reduces stress on your Defender HD8’s drivetrain, letting your axles, driveshaft, differential, and transmission work less, which lowers wear and helps prevent costly repairs.
Unmatched Strength
Durability matters. That’s why SuperATV's GDP Portals come with your choice of cast or billet aluminum housing and heavy-duty 5/16” backing plates made from advanced steel alloy. They’re built to handle abuse and backed by a lifetime warranty.
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
Don't Forget a Frame Stiffener
Monster tires and portals bring the fun—but they also stress your machine’s frame. Reinforce your suspension with a SuperATV Frame Stiffener for unbeatable durability.
You Can’t Beat The Customer Service
Picking the right portals for your ride can be tough. That’s why SuperATV's top-notch customer service team is here to help. Call us, and SuperATV will make sure you get the perfect setup.
6” 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
(6) Brake caliper mounts
(2) Steel steering arms
Extended brake lines with parking brake and brake cable brackets
All required hardware including recessed castle nut socket
Max Tire Size Recommendations for 6” Portal Gear Lift
Max Tire Size
Required Suspension Setup with GDP Portals
34"
2" Forward Offset A-Arms
39"
6" Lift Kit (strongly recommended)
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 housings
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
Lighter than the competition
Fitment information
Can-Am Defender HD 8 : 2016-2021
Can-Am Defender HD 8 DPS : 2016-2021
Can-Am Defender HD 8 XT : 2016-2021
Can-Am Defender MAX HD 8 : 2017-2021
Can-Am Defender MAX HD 8 DPS : 2017-2021
Can-Am Defender MAX HD 8 XT : 2017-2021
Wheel Requirements:
18” or larger wheel required
18” wheels cannot exceed 4-1/2” backspacing
20” and larger 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
NOTE: Big Lift Kit or 2" Forward Offset A-Arms strongly recommended
