The John Deere LA125 deck belt part number found is GX20250. The deck belt size found is 104 in (2,642 mm) long by 0.5 in (13 mm) wide. The drive belt part number found is GX20006. The drive belt size found is 88.9 in (2,258 mm) long by 0.5 in (13 mm) wide.
John Deere LA125 Belt Size and Part Numbers
| Mower deck belt part number | GX20250 |
|---|---|
| Mower deck belt length | 104 in (2,642 mm) |
| Mower deck belt width | 0.5 in (13 mm) |
| Drive belt part number | GX20006 |
| Drive belt length | 88.9 in (2,258 mm) |
| Drive belt width | 0.5 in (13 mm) |
Belt Size Comparison Chart
Belt length comparison
Belt width comparison
John Deere LA125 Belt Notes
| Mower deck belt note | The John Deere LA125 deck belt listing shows part number GX20250, length 104 in (2,642 mm) and width 0.5 in (13 mm). Confirm the belt against the deck tag, belt decal or parts diagram before ordering |
|---|---|
| Drive belt note | The John Deere LA125 drive or transmission belt listing shows part number GX20006, length 88.9 in (2,258 mm) and width 0.5 in (13 mm). Treat it as partial drive-belt data if no matching width or OEM part number is shown |
| Fitment note | The blunt rule with the John Deere LA125: 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 LA125 Belt Size FAQ
Is a close belt length good enough for the John Deere LA125 deck?
The deck belt length found is 104 in (2,642 mm). Close is not the same as correct. A belt that is slightly short can overload bearings, while one slightly long can slip or fail to engage the blades cleanly
Should you buy the John Deere LA125 belt by length only?
No. 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. Use length, width and OEM part number together where possible
How do you avoid mixing up the John Deere LA125 deck and drive belts?
Use the belt position first: deck belt part number GX20250 and drive belt part number GX20006. A deck belt number does not automatically fit the drive system, even when an aftermarket listing makes the cross-reference look close
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.
