FOX Sportster RC1 Shock - Shocks XL 13.5 Inch — Harley-Davidson Sportster 1200 Custom, Sportster 883, Sportster 1200 (1988-2020)

FOX RC-1 rear shock for Harley Sportster XL, engineered with an external piggyback reservoir that separates damping oil from nitrogen gas for consistent control throughout your ride. Features 24-way compression and 12-way rebound adjustability so you can dial in damping to match your weight and riding style.

Features

• Gas-charged mono-tube with internal floating piston (IFP)
• 24-position adjustable compression damping
• 12-position adjustable rebound damping
• Aluminum piggyback reservoir with adjustment knobs
• Spring preload setting guide marks for easy tuning
• 5/8-inch hard chrome shaft with low-friction super-finish
• 1.5-inch 6061-T6 aluminum body, type III hard anodized
• Fully rebuildable and revalvable
• Advanced high-flow velocity-sensitive damping

Specifications

• Brand: FOX
• Manufacturer Part #: 897-27-017
• UPC: 788000423660
• Length: 31 in
• Width: 13 in
• Height: 6 in
• Weight: 13 lbs
• Body Material: 6061-T6 aluminum, type III hard anodized
• Shaft Diameter: 5/8 inch

Fitment

Fits Harley-Davidson Sportster XL models. Recommended for riders with up to 240 lbs total ride load.

Frequently Asked Questions

Can I adjust compression and rebound on the fly?

Yes — the piggyback reservoir has adjustment knobs for both compression (24 positions) and rebound (12 positions) damping. Dial them in while parked or riding to tune the feel.

What if I weigh more than 240 lbs?

FOX recommends this shock for up to 240 lbs total ride load. Heavier riders should contact FOX or a dealer about a spring upgrade or alternative model.

How do I set the spring preload?

The shock includes guide marks on the preload ring to help you dial in sag. Adjust until the rear end settles 1–1.5 inches when you sit on the bike.

Can this shock be rebuilt?

Yes — FOX designed the RC-1 to be fully rebuildable and revalvable, so you can service seals, springs, and damping internals as needed.

What makes this different from stock shocks?

The external piggyback reservoir keeps damping oil and nitrogen gas separated, preventing mixing and maintaining consistent damping control. Stock shocks lack this isolation.