The SuperATV Can-Am Defender HD5 4" Portal Gear Lift adds ground clearance and a built-in 15% or 30% gear reduction so your Defender can turn bigger tires without overloading the drivetrain. Because the reduction sits in the hub, your axles, differential, prop shaft and transmission see less stress.
Choose cast or billet aluminum housings, and single or patented dual idler gears that spread the load over twice the gear surface. GDP uses precision-ground 9310 steel gears, sealed input gears, double-lipped output seals and double-angular contact output bearings to keep the portals sealed and quiet.
Tell us whether your Defender HD5 already has a big lift kit, since the steering arm setup differs.
SuperATV recommends a frame stiffener with portals and big tires. Add the SuperATV Can-Am Defender HD5 frame stiffener to reinforce the A-arm mounts before you install your portals.
Key Features
- 15% or 30% gear reduction
- Cast or billet aluminum housings
- Single or dual idler gear configuration
- Precision-ground 9310 alloy steel gears
- 1.5-inch 4340 hardened steel drive shaft
- Sealed input gear and double-lipped output seal
- Universal hubs for 4/156, 4/137, 4/115 and 4/110 bolt patterns
- Extended brake lines and steering arms included
Built To Solve: Clearance, Torque and Tire Size on the Can-Am Defender HD5
- Not enough ground clearance for rocks, ruts and mud
- Big tires bogging down the stock gearing
- Stress on axles, differential and transmission from oversized tires
- Lift kits that add height without adding torque
Best For: Defender HD5 Owners Running Bigger Tires for Mud, Rocks or Work
- Mud and rock riders who want more torque (30% reduction)
- Trail and work riders who want to keep speed (15% reduction)
- Owners who want the strongest setup (billet housing, dual idler)
- Owners adding a Defender HD5 frame stiffener for frame support
Specifications
- Portal size: 4-inch
- Gear reduction: 15% or 30%
- Housing: cast or billet aluminum
- Tire size with 4-inch portals: up to 26 inches on stock suspension
- Up to 27 inches with a 3-inch lift kit
- 28 to 34 inches with 2-inch forward offset A-arms
- 28 to 38 inches with a 6-inch lift kit
- Idler: single or dual (dual adds 3/4-inch front and rear offset, 1.5-inch total extension)
- Gears: precision-ground 9310 alloy steel
- Drive shaft: 1.5-inch 4340 hardened steel
- Universal hub bolt patterns: 4/156, 4/137, 4/115, 4/110
- Wheels: 14-inch or larger, max 4-1/2-inch backspacing, not compatible with dual beadlock wheels; 3.25-inch (82.55 mm) center bore or a 1-inch spacer required
- Includes: (4) assembled portal hub boxes with 9310 gears, seals, output shaft, gaskets and thrust bearings; (4) universal hubs and stainless slotted rotors with lugs; (4) steel alloy backing plates; (4) steel caliper mounting plates; (2) steel steering arms; extended brake lines; all hardware including recessed castle nut socket
- Patents: 11,299,042 and 11,318,787
Fitment
- Can-Am Defender HD5 and HD5 DPS (2017-2021)
- Wheel requirements: 14-inch or larger, max 4-1/2-inch backspacing, not compatible with dual beadlock wheels
Choose the big lift kit option that matches your machine. The frame stiffener is sold separately as its own listing (linked above).
Fitment is not guaranteed on models, trims or years not listed above, or on machines with modified chassis or aftermarket parts in the way; confirm your exact model before ordering.
FAQ
Is a portal gear lift better than a standard lift kit?
Portals add ground clearance and torque together by moving the gear reduction to the hub, while a lift kit only adds height.
Should I pick 15% or 30% gear reduction?
15% keeps more trail speed with added torque; 30% suits heavy loads, mud and bigger tires that need more low-end power.
What is a dual idler?
A second idler gear in the portal box spreads the load over twice as much gear surface for stronger, more reliable torque transfer.
What wheels do I need?
14-inch or larger wheels with no more than 4-1/2 inches of backspacing; dual beadlock wheels are not compatible.
Do I need a frame stiffener?
SuperATV recommends one, because portals and big tires add stress to the frame.
Why does the big lift kit option matter?
Machines with a big lift kit use a different steering arm and portal configuration, so pick the option that matches your Defender.
Why SuperATV
SuperATV's GDP portals are built around precision CNC-ground 9310 steel gears, advanced steel alloy backing plates and an optional patented dual idler design, with a dedicated portal tech support team behind them. Dunes 2 Dezert SXS ships SuperATV portal gear lifts nationwide with fitment checked against SuperATV's own list.
Complete Your Can-Am Defender HD5 Portal Build
Choose your gear reduction, housing, idler and big lift kit option, confirm wheel size and backspacing, and add a Defender HD5 frame stiffener. Pick up portal gear oil and plan tires around the fitment chart before you order.
