CUB CADET 603-05059D-4021 Caster Wheel Yoke Yellow 2 RZT 42 46 50 54 S

What It Is

This is the OEM Cub Cadet caster wheel yoke assembly (part number 603-05059D-4021) in yellow, designed to hold the front caster wheel on select Cub Cadet RZT zero-turn mowers. It replaces a worn, bent, or broken yoke that supports the front wheel and allows steering pivot.

Fitment & Compatibility

Direct fit for these Cub Cadet RZT mowers:

• RZT 42, 46, 50, 54 S (and some RZT L models)
• Also fits select LT, GT, and Z-Force models with the same yoke design

What to check before buying:

• Deck size – Confirmed for 42", 46", 50", and 54" decks on RZT S series.
• OEM vs aftermarket – This is genuine Cub Cadet; aftermarket yokes may have different hole spacing or bearing sizes.
• Measurements – Yoke bolt hole center-to-center is about 2.5" (verify against your old part).
• Wheel compatibility – Uses a standard 11x4.00-5 caster wheel (sold separately).
• Color – Yellow matches factory RZT S series; other models may use black or red.

Key Things to Know

• Quality – OEM stamped steel with powder coat; much stronger than many aftermarket replacements.
• Installation difficulty – Moderate. You’ll need a jack, wrench set, and possibly a hammer to remove the old yoke from the spindle.
• Common gotcha – The yoke bushing and bearings are often worn simultaneously; inspect and replace them if needed (sold separately).
• Price note – At $132.81, it’s pricier than generic yokes, but fit is guaranteed and the 5.0 rating reflects long-term reliability.

Should You Buy It

Buy this if you own an RZT S-series mower and need a direct, drop-in replacement that won’t require modifications. It’s also the right choice if you’ve had trouble with aftermarket yokes wearing out quickly or not aligning properly. Skip it if you’re on a tight budget or your mower isn’t on the compatibility list.