The John Deere LA145 deck belt part number found is GX21833. The deck belt length found is 142 in (3,607 mm). The drive belt part number found is GX20006. The drive belt size found is 88 in (2,235 mm) long by 0.5 in (13 mm) wide.
John Deere LA145 Belt Size and Part Numbers
| Mower deck belt part number | GX21833 |
|---|---|
| Mower deck belt length | 142 in (3,607 mm) |
| Drive belt part number | GX20006 |
| Drive belt length | 88 in (2,235 mm) |
| Drive belt width | 0.5 in (13 mm) |
Belt Size Comparison Chart
Belt length comparison
Belt width comparison
John Deere LA145 Belt Notes
| Mower deck belt note | The John Deere LA145 deck belt listing shows part number GX21833 with length 142 in (3,607 mm). Match the old belt, deck size and routing before spending money |
|---|---|
| Drive belt note | The John Deere LA145 drive or transmission belt listing shows part number GX20006, length 88 in (2,235 mm) and width 0.5 in (13 mm). Do not mix it up with the deck belt because the routing and job are different |
| Fitment note | For the John Deere LA145, use the listed specs as a buying guide, but confirm against the operator manual, parts diagram or belt label before spending money |
John Deere LA145 Belt Size FAQ
What should you watch when fitting a 142 in (3,607 mm) deck belt on the John Deere LA145?
A 142 in (3,607 mm) deck belt leaves little room for sloppy routing. This is a very long belt run, so pulley alignment, belt keepers and idler tension matter a lot. Long belts punish sloppy routing fast. Before blaming the new belt, compare the belt path to the routing decal and make sure it sits on the correct side of each keeper
Why does 0.5 in (13 mm) belt width matter on the John Deere LA145?
The captured drive belt width is 0.5 in (13 mm). Pulley grooves are cut for a matching belt profile. Wrong width can cause squeal, heat, poor blade speed or fast belt wear
How do you avoid mixing up the John Deere LA145 deck and drive belts?
Use the belt position first: deck belt part number GX21833 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
What should you double-check with the John Deere LA145 deck belt part number?
The captured deck belt number is GX21833. Because the width is missing here, check the old belt label, deck tag or parts diagram before trusting a non-OEM cross-reference
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.
