Caltric Deck Gauge Wheel with Arm Compatible with John Deere X320 X324 X340 X360 X500 X520 X534 X540 x2

What It Is

This Caltric deck gauge wheel with arm (sold as a pair) replaces the factory gauge wheels on select John Deere lawn tractors. It helps prevent the mower deck from scalping uneven terrain by maintaining a consistent cutting height.

Fitment & Compatibility

Before buying, confirm your John Deere model: X320, X324, X340, X360, X500, X520, X534, or X540. This set fits 48-inch and 54-inch decks commonly found on these machines. Check your deck’s arm bracket and wheel stud pattern—Caltric replicates the OEM design, but aftermarket parts can have slight dimensional variances. Measure the existing wheel arm length (approx. 8 inches) and wheel diameter (approx. 6 inches) to match. Caltric lists this as a direct swap for OEM part numbers AM137603 and AM137604, but verify your deck’s arm mount orientation (some models use left/right specific arms). If your deck has a different bracket style or wheel offset, this may not fit.

Key Things to Know

• Build quality: Caltric uses steel arms and plastic wheels. They’re durable for residential use but may not hold up as long as OEM under heavy commercial mowing.
• Installation difficulty: Easy—typically a bolt-on job with basic hand tools. You’ll need a socket wrench (usually 9/16” or 1/2”) and possibly a pry bar to align the arm with the deck bracket. No drilling or modifications required.
• Common gotcha: The included hardware may be metric, while your John Deere deck uses SAE fasteners. Have a set of metric sockets handy, or plan to reuse your original bolts if they fit.
• Pair note: This listing is for two assemblies (left and right). If you only need one side, you’ll have a spare—but no single-arm option is available.

Should You Buy It

If you own one of the listed John Deere models and need a budget-friendly replacement for worn or missing deck gauge wheels, this Caltric set is a solid choice for light to moderate residential mowing. It’s not for heavy commercial use or if you demand exact OEM tolerances, but for the price, it gets the job done with simple installation.