UDC Parts M154958 Secondary Deck Belt Replacement for John Deere 48 Inch GT235 GT262 X300 320 345 325 180 245 265 GX345 LX280 GT275 335 M110313 954-04055 754-04055 / Aramid Cord / 111.400 inches

What It Is

This is a secondary (drive) deck belt for 48-inch cutting decks on select John Deere lawn tractors. It transfers power from the engine pulley to the mower blades, and is designed as a direct aftermarket replacement for OEM part numbers M154958, M110313, 954-04055, and 754-04055.

Fitment & Compatibility

Check your deck size first – this belt is specifically for 48-inch decks, not 42-inch or 54-inch. It fits the following John Deere models: GT235, GT262, X300, X320, X345, 325, 180, 245, 265, GX345, LX280, GT275, and 335. Measure your old belt – it should be 111.4 inches long (end-to-end). If yours is longer or shorter, it won’t fit. Verify OEM part number – look on your old belt or in your manual for M154958, M110313, 954-04055, or 754-04055. This is an aftermarket belt, not John Deere OEM, but matches the dimensions and routing.

Key Things to Know

• Aramid cord construction – more heat-resistant and durable than standard rubber belts, good for heavy use or tall grass.
• Installation is moderate – you’ll need to remove the deck (or at least the belt cover) and release the tensioner pulley. Have a wrench or socket set handy.
• Common gotcha – the belt routing is specific; check a diagram online or in your manual. Reversing the belt path will cause slipping or poor blade engagement.
• Price vs OEM – at ~$25, this is about half the cost of a John Deere-branded belt. Many users report 2–3 seasons of life with regular mowing.

Should You Buy It

If you need a reliable, budget-friendly replacement for a 48-inch John Deere deck and you’re comfortable with a straightforward belt swap, this is a solid choice. It’s not for odd-sized decks or non-John Deere machines, but for the listed models, it offers good value and durability for the price.