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Pro-Par · Brakes & Wheel End
WC171R
In stock · ships from Knoxville
This is a right‑hand S‑cam brake camshaft for trailer axles equipped with Spicer 16‑1/2‑inch brakes.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 2 applications
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All confirmed applications for this part number.
Other applications
Other applications
Fits 16‑1/2‑inch Spicer trailer brakes with 28‑spline, 1‑1/2‑inch shaft. Always confirm brake diameter, spline count, effective length, and rotation before ordering.
Part data verified against 3 catalog sources
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When air is applied to the brake chamber, the S‑cam rotates and forces the brake shoes against the drum to slow or stop the trailer. The camshaft measures approximately 20‑3/8 inches in effective length, has a 1‑1/2‑inch diameter 28‑spline input, and fits in a 2‑7/32‑inch bushing journal. Typically replaced when splines are worn, the cam head is damaged, or braking becomes uneven due to bushing wear.
Part Number: WC171R
S-CAM, SPICER
Unit: ea
Dealer: Knox Trailers
Compatibility, alternatives, and more
Parts commonly needed alongside brakes & wheel end
