Can-Am Defender HD11 4" Portal Gear Lift

Description Take Your Defender HD11 to the Next Level with GDP Portals SuperATV’s 4” Portal Gear Lift for the Can-Am Defender HD11 combines 4 inches of lift with an integrated gear reduction for increased torque and ground clearance. It allows larger tires while reducing stress on the drivetrain. Gear reduction options include 15% or 30%, and the upgrade from cast to billet aluminum housing provides enhanced strength and durability for extreme conditions. These portals don’t just upgrade your ride—they transform it. Built to Conquer the Trail No matter where or how you ride, GDP Portal Gear Lifts deliver. Tear up dunes, dive into mud, fly through trails, or put your machine to work with confidence. Pick a 15% gear reduction for faster, more aggressive riding, or a 30% reduction for extreme torque and massive tires. Your Drivetrain Stays Safe By relocating the gear reduction to the wheel hub, GDP portals absorb much of the workload before it reaches the drivetrain. This design helps protect essential parts—axles, differentials, prop shafts, and transmissions—from unnecessary stress caused by having larger tires. Built Tough with Aluminum and Steel Our cast and billet aluminum housings are the thickest and strongest you can get. Combine that with 5/16” backing plates made from an advanced steel alloy, and our portals are unbeatable. 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 Top-Tier Customer Service Got questions or want to double-check your choices? Our dedicated portal team is ready when you are. Give us a call and we’ll help you get exactly what you need. 4” Portal Gear Lift Includes: (4) Assembled portal hub boxes complete with 9310 gears, seals, output shaft, Thermo-Tork® 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 (6) Steel sleeves (12) Bushings (4) Shims Frame Stiffener Extended brake lines All required hardware, including recessed castle nut socket Max Tire Size Recommendations for 4” Portal Gear Lift Max Tire Size Required Suspension Setup with 4" Portals 32" Stock 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. Features Available with billet or cast aluminum housing 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 hub fits all major bolt patterns Gear reduction reduces stress on your drivetrain Lighter than the competition Fitment 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 XT Cab : 2026+ Can-Am Defender MAX HD 11 XT : 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+ 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