John Deere GY20570 Replacement: Compare 13 Options

How to find your model number

Check your model number before you buy a replacement for the GY20570. On a riding mower or lawn tractor the model and serial label is usually under the seat, on the frame beside the seat, or near the battery. Deck parts may also need the deck size, which is often on a decal on top of the deck.

If the old belt is still readable, the part number is often printed on its back. To measure it, run a cloth tape along the outside of the belt and note its width.

Spring maintenance

Check the deck belt before the first cut: replace it if it is cracked, frayed, glazed or slipping on the pulleys. Look over the idler pulleys at the same time.

Maker's part vs aftermarket: the GY20570

We did not find John Deere's own GY20570 on Amazon. 13 brands sell a deck belt listed as its replacement, including Affordstore, Autonano, Beltchoice, BlueStars.

• Maker's own part: made and sold by the equipment or engine maker (for example John Deere, MTD or Briggs & Stratton). Usually the highest price.
• Aftermarket parts: made by other companies to the same size and fit. Usually cheaper; materials and build quality vary by brand.
• Before you buy: find your equipment's model number (see How to find your model number, above), compare the size of your old part, and confirm the fit on the product page.