Progressive Fork Cartridge Kit replaces all OEM fork internals with gas-charged monotube damper cartridges and custom-tuned fork springs for improved front-end handling and braking stability. Available in stock and lowered ride-height versions to suit your setup.
Features
- Gas-charged monotube damper cartridges
- Custom-tuned fork springs in stock and lowered versions
- Reduces front brake dive
- Improves front-end stability and cornering
- Bottoming control
- Lifetime Limited Warranty
Specifications
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Brand: Progressive
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Manufacturer Part #: 31-4011
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Category: Suspension / Fork Cartridge Kits
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Weight: 12.7 lb
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WARNING: Cancer and Reproductive Harm — California Prop 65. www.P65Warnings.ca.gov
Fitment
Fits Harley-Davidson models. Verify your specific year and model compatibility before ordering, as cartridge kits vary by fork tube diameter and model generation.
Frequently Asked Questions
Do I need to replace the entire fork, or just the internals?
Just the internals — this kit replaces damper cartridges and springs while reusing your existing fork tubes and sliders.
Will this reduce my front brake dive?
Yes. The improved damping and spring rates work together to control brake nosedive and stabilize the front end under hard braking.
What's the difference between stock and lowered versions?
Stock version maintains original ride height. Lowered version drops the front end by approximately 1 to 1.5 inches depending on your model.
Is installation difficult?
Fork cartridge installation requires disassembling the forks, draining fluid, and specialized tools. Most riders have a shop install these kits.
California Proposition 65 Warning
WARNING: Cancer and Reproductive Harm — California Prop 65 (Y). www.P65Warnings.ca.gov
