Get the Torque You Need
Get ultimate torque and acceleration with a choice between a 30% or 45% gear reduction. For maximum torque and larger tires, you’ll want to go with a 45% reduction. You’ll have the power to take off from a dead stop, haul large loads, and trudge through muddy and rocky terrain. Choose 30% to maintain top speed while still getting that boost in torque.
Keep Your Drivetrain Protected
With that extra weight being thrown around, you can cause damage to your drivetrain. GDP Portals put the gear reduction in the hub, so your drivetrain gets protected from extra wear. Plus, our Honda Foreman portal gear lift keeps your factory suspension so you have cooler-running axles.
The Toughest Portals on the Market
When you’re dominating the trails with your buddies, the last thing you need is a portal getting damaged and stopping your ride. That’s why we designed our cast and 6061 billet aluminum housings. They’re perfect for rough terrain and hard rides. They’re backed by our advanced steel backing plates that give them unmatched strength.
•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
6” Portal Gear Lift Includes:
•(4) Assembled portal hub boxes complete with 9310 gears, seals, output shaft, gaskets, and thrust bearings
•(4) Universal hubs and precision-ground stainless steel slotted rotors with lugs
•(4) Specialized steel alloy backing plates
•(2) Steel caliper mounting plates
•(2) Caliper mounting plate shims
•Extended brake lines
•All required hardware, including recessed castle nut socket
Honda Foreman Max Tire Size Recommendations
Tire Size Required Suspension Setup with 4" Portals
28" Stock
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
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 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
Honda Foreman 500 : 2015-2019
Honda Foreman 520 : 2020+
NOTE: Only compatible on machines with IRS (Independent Rear Suspension)
Wheel Requirements
•18” or larger wheel required
•20” and larger wheels cannot exceed 5” backspacing
