The John Deere S170 deck belt part number found is M154202. The deck belt size found is 95 in (2,413 mm) long by 0.5 in (13 mm) wide. The drive belt part number found is GX21833. The drive belt length found is 87 in (2,210 mm).
John Deere S170 Belt Size and Part Numbers
| Mower deck belt part number | M154202 |
|---|---|
| Mower deck belt length | 95 in (2,413 mm) |
| Mower deck belt width | 0.5 in (13 mm) |
| Drive belt part number | GX21833 |
| Drive belt length | 87 in (2,210 mm) |
Belt Size Comparison Chart
Belt length comparison
Belt width comparison
John Deere S170 Belt Notes
| Mower deck belt note | The John Deere S170 deck belt listing shows part number M154202, length 95 in (2,413 mm) and width 0.5 in (13 mm). Match the old belt, deck size and routing before spending money |
|---|---|
| Drive belt note | The John Deere S170 drive or transmission belt listing shows part number GX21833 with length 87 in (2,210 mm). Do not mix it up with the deck belt because the routing and job are different |
| Fitment note | For the John Deere S170, use the listed specs as a buying guide, but confirm against the operator manual, parts diagram or belt label before spending money |
John Deere S170 Belt Size FAQ
Why can the correct John Deere S170 deck belt still slip?
The deck belt length found is 95 in (2,413 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
Why does 0.5 in (13 mm) belt width matter on the John Deere S170?
The captured deck 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 S170 deck and drive belts?
Use the belt position first: deck belt part number M154202 and drive belt part number GX21833. A deck belt number does not automatically fit the drive system, even when an aftermarket listing makes the cross-reference look close
Is the captured John Deere S170 drive belt part number enough to buy from?
The captured drive belt number is GX21833. That is useful for OEM lookup, but the drive belt width was not fully captured here. It is weak data for guessing an aftermarket belt by size alone
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.
