SuperATV Can-Am Defender HD8 4" Portal Gear Lift

Dominate Any Terrain in Your Defender HD8 with GDP Portals
Ready to tackle tougher trails? The SuperATV 4” Portal Gear Lift for your Can-Am Defender HD8 gives you 6 inches of lift and a built-in gear reduction for more torque and ground clearance. Run larger tires with ease and choose a 15% or a 30% gear reduction depending on how you like to ride. Upgrade from cast to billet aluminum housing for extra strength. For maximum performance, choose our dual idler options.

What Is a Dual Idler?
We’ve spent years perfecting our dual idler gear portals. Adding a second idler gear spreads the load over more surface area, giving you more reliable torque and a super-strong gear set. But it’s all about fit—so we precision CNC grind every gear from 9310 steel for perfect mesh.

An Option for Every Rider
No matter how you ride, GDP Portal Gear Lifts are ready to deliver. Rip across dunes, blast through trails, crawl through mud, or put in work around the property—there’s a portal built for it. Run a 15% gear reduction for speed and fun, or drop down to 30% for max torque and big tire domination. Upgrade to dual idler gears and push your rig harder than ever.

Protect Your Drivetrain
GDP portals shift the gear reduction to the hub, taking stress off the drivetrain where it matters most. As a result, major components—axles, differential, prop shafts, and transmission—are protected from the excessive force required to turn large tires.

Built Tough with Aluminum and Steel
These portals are made to last. With cast and billet aluminum housings and heavy-duty advanced steel alloy backing plates, they’re built to handle whatever you throw at them.

• ✔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
Portals and monster tires push your machine to the limit—and your frame feels it. Ensure maximum durability by installing a SuperATV Frame Stiffener along with your new HD8 portals.

Top-Notch Customer Service
Not sure which portals you need? No problem—our customer service team is here for you. Call us up and we’ll get you dialed in with the perfect set.

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