The deck belt size found is 156.6 in (3,978 mm) long by 0.5 in (13 mm) wide. The drive belt length found is 92 in (2,337 mm).
John Deere X320 Belt Size and Part Numbers
| Mower deck belt length | 156.6 in (3,978 mm) |
|---|---|
| Mower deck belt width | 0.5 in (13 mm) |
| Drive belt length | 92 in (2,337 mm) |
Belt Size Comparison Chart
Belt length comparison
Belt width comparison
John Deere X320 Belt Notes
| Mower deck belt note | The John Deere X320 deck belt measurement captured here is length 156.6 in (3,978 mm) and width 0.5 in (13 mm). Use the listed value as a buying guide, not a blind substitute for the deck-specific parts diagram |
|---|---|
| Drive belt note | The John Deere X320 drive or transmission belt measurement captured here is length 92 in (2,337 mm). This is separate from the mower deck belt |
| Fitment note | The blunt rule with the John Deere X320: part number beats guesswork. If the belt is off by even a small amount, it can slip, squeal, jump pulleys or wear fast |
John Deere X320 Belt Size FAQ
Why can the correct John Deere X320 deck belt still slip?
The deck belt length found is 156.6 in (3,978 mm). Even with the right length, a weak idler spring, worn pulley groove or wrong belt path can make it slip. The part number and routing matter together
Can you replace the John Deere X320 belt with the same length but different width?
The deck belt width found is 0.5 in (13 mm). That is the common 1/2-inch belt width range. Still match the OEM number because the belt angle, fabric wrap and effective length can differ. A belt with the wrong top width can ride too high or too low in the pulley even if the length looks right
Which John Deere X320 belt needs more careful length matching?
The deck belt is longer here: deck 156.6 in (3,978 mm) versus drive 92 in (2,337 mm), about 64.6 in (1,641 mm) different. Do not cross-match them just because both are mower belts
Mistakes do happen. Belt specs can change by year, mower deck, pulley layout, serial range and regional parts catalog. Please check the operator manual, belt routing decal, old belt label and official John Deere parts catalog before ordering a replacement belt.
