2 Piece Front and Rear Mower Deck Gauge Wheel Arm Replace Parts AM131288 AM131289 For John Deere Mower Decks, 48C 54C and 62C Diameter 1", Compatible with GX345 GX355 4210 GT225 GT235 X465 X575 X585

What It Is

These are replacement gauge wheel arms for John Deere mower decks—the metal brackets that hold the front and rear gauge wheels, keeping the deck level and preventing scalping. Designed for 48C, 54C, and 62C decks, they replace OEM parts AM131288 (front) and AM131289 (rear).

Fitment & Compatibility

Check your deck size: Only fits 48C, 54C, or 62C stamped steel decks. Will not fit 42C, 48S, 54S, or 7-Iron decks.

Check your model: Compatible with GX345, GX355, 4210, GT225, GT235, X465, X575, X585. Also fits many X300, X500, and X700 series models with those decks—but confirm your deck model, not just tractor model.

OEM vs aftermarket: These are non-OEM replacements. They match the original dimensions but may use slightly thinner steel or different finish. Verify the spindle hole is exactly 1" diameter (listed as 1", but measure your old arm to be safe).

What to measure: Arm length from pivot hole center to wheel axle center. Front arms are shorter than rear arms. If your old arm is bent or broken, compare to a known-good arm from a same-deck machine.

Key Things to Know

• Installation difficulty: Easy. Usually just two bolts per arm (one at deck, one at wheel). No special tools needed.
• Quality concerns: Some users report the powder coat chips quickly or the metal bends easier than OEM. Not heavy-duty for commercial use.
• Wheel fitment: These are arms only—you reuse your existing gauge wheels and hardware. Check that your wheel bearings aren’t worn before swapping.
• Bolt pattern: The wheel mounting hole is 1" diameter, but the bolt pattern for the deck may vary slightly between 48C, 54C, and 62C—trial fit before tightening.

Should You Buy It

Right for you if you need a budget-friendly replacement for a bent or broken arm on a residential John Deere with a 48C/54C/62C deck and you’re comfortable with aftermarket steel quality. Skip if you need heavy-duty durability (commercial mowing, rocky terrain) or if your deck model isn’t in the compatibility list—measure twice, buy once.