The right belt for a Husqvarna machine is usually found by part number, not by guesswork and not by deck size alone. A proper Husqvarna belt size chart should help you match the belt type, width, and length before you order. Going by deck size alone is often not enough, especially when similar machines use different belt routes. If you are replacing a worn deck belt or drive belt, the chart below will help narrow it down fast, and the fit guide later will help you make sure it is truly the right one.
Husqvarna Belt Size Chart By Model
If the machine model is known, this is the quickest starting point. Most people searching for a Husqvarna belt size chart want a short list of matches first, not a huge catalog.
| Model | Deck Size | Belt Type | Belt Size |
|---|---|---|---|
| GTH200 / GTH220 / GTH250 | 42″–50″ | Ground Drive | 1/2″ × 84.75″ |
| LTH1742T / LTH1842 / LTH2142D | 42″ | Transmission Drive | 1/2″ × 90.25″ |
| LTH1797 / LTH2038 / LTH2038R | 38″ | Transmission Drive | 1/2″ × 90.25″ |
| TS242 / TS342 | 42″ | Transmission Drive | 1/2″ × 90.25″ |
| TS246 | 46″ | Transmission Drive | 1/2″ × 90.25″ |
| TS348 | 48″ | Transmission Drive | 1/2″ × 90.25″ |
| YTH2042T / YTH2242TDF | 42″ | Transmission Drive | 1/2″ × 90.25″ |
HU675 through HU800 walk-behind units and R318X or R320X rider setups can vary by exact model and attachment, so those belts should be checked against the original parts diagram or the Husqvarna parts lookup. Husqvarna directs owners to search by model number on its manuals and parts support pages, which is the safest path when the belt print is gone.
For many off-road maintenance jobs, this model table is only the first filter. A replacement drive belt or cutting deck belt should still be verified by part number before purchase.
Husqvarna Belt Sizes By Part Number
This is the core of any useful Husqvarna belt size chart. If the old number is still readable, use it before using deck size. Husqvarna and service listings consistently point back to the specific part number because similar decks may use different routing and pulley layouts.
| Part Number | Belt Type | Width | Length |
|---|---|---|---|
| 532125907 | Transmission Drive | 1/2″ | 90.25″ |
| 532140218 | Ground Drive | 1/2″ | 84.75″ |
| 532144959 | Deck Belt | 1/2″ | 95.5″ |
| 532138255 | Ground Drive | 1/2″ | 95.5″ |
| 532130969 | Deck Belt | 1/2″ | 92.5″ |
| 532174883 | Deck Belt | 5/8″ | 97.5″ |
| 539110410 | Drive Belt | 1/2″ | 105.1″ |
| 539110832 | Deck Belt | 5/8″ | 145″ |
| 539117245 | Deck Belt | 5/8″ | 123.63″ |
| 574845601 | Deck Belt | 5/8″ | 126.85″ |
| 574845602 | Deck Belt | 5/8″ | 135″ |
| 574845603 | Deck Belt | 5/8″ | 143.5″ |
For broader lookup, part numbers can also be grouped by width:
- 1/2″ belts are common in transmission systems and smaller or mid-size decks
- 5/8″ belts are common on larger deck systems
- 0.66″ belts are more common on larger commercial deck layouts
Another point matters more than many short guides mention. Belt length must be within the pulley path and tensioner range. Even a small size difference can affect belt tracking, spring travel, and blade speed. That is why a deck belt replacement should be matched by part number first, then by width and length.
Replacement Cross Reference
Aftermarket cross references can save time when the exact belt is not easy to source locally. Still, the replacement should match the original application, width, and profile. Cross-reference charts are useful, but they work best when tied back to the same part number.
| Husqvarna Part Number | Husqvarna Size | Stens Replacement | Stens Size |
|---|---|---|---|
| 532125907 | 90.25″ × 1/2″ | 265-101 / 265-057 | 90.25″ × 1/2″ |
| 532144959 | 95.5″ × 1/2″ | 265-938 / 265-042 | 95.5″ × 1/2″ |
| 532140218 | 84.75″ × 1/2″ | 265-022 | 84.75″ × 1/2″ |
| 532130969 | 92.5″ × 1/2″ | 265-238 | 92.5″ × 1/2″ |
| 539110410 | 105.1″ × 1/2″ | 265-910 | 105″ × 1/2″ |
| 539117245 | 123.63″ × 5/8″ | 265-145 | 123.63″ × 5/8″ |
Small rounding differences in aftermarket listings are common. What matters is whether the replacement is mapped to the same application. If a listing only gives a size but no clear cross-reference, that is not enough for a confident order.
This is also where a belt cross-reference helps more than a generic dimension search.
Belt Size Chart By Deck Size and Belt Function
A deck-width view is useful, but it should stay a secondary filter. The same cut width can still use different belts based on the machine family, idler layout, and drive system.
| Deck Size | Common Belt Type | Example Part Numbers | Example Belt Sizes |
|---|---|---|---|
| 38″ | Transmission Drive | LTH1797 / LTH2038 | 1/2″ × 90.25″ |
| 42″ | Transmission Drive | LTH1742T / TS242 | 1/2″ × 90.25″ |
| 46″ | Deck Belt | 532144959 / 532408381 | 1/2″ × 95.5″ |
| 48″ | Deck Belt | 539117245 / 574845601 | 5/8″ × 123.63″–126.85″ |
| 50″ | Ground Drive | GTH200 / GTH220 | 1/2″ × 84.75″ |
| 54″ | Deck Belt | 539110832 / 539103687 | 5/8″ × 145″–152″ |
| 61″ | Deck Belt | 522795901 | 0.66″ × 163.5″ |
Use this table as a narrowing tool, not final proof. For a fast check, confirm these four points in order:
- Machine model
- Belt function
- Belt width
- Belt length
Once the size is confirmed, aftermarket Husqvarna lawn mower belts can be a cost-effective alternative to original parts. This matters even more on off-road property equipment that sees dust, slope work, shock loads, and long mowing hours. Under those conditions, the wrong belt may install, but still slip, ride low in the pulley, or throw off tension.
A good Husqvarna belt size chart should therefore answer two questions early: what size it is, and what job that belt does.
Deck Belt Vs Drive Belt: How To Confirm The Right Belt
A deck belt drives the cutting deck and blade system. Common examples are 583581401 at 1/2″ × 92.25″, 532144959 at 1/2″ × 95.5″, and 539117245 at 5/8″ × 123.63″.
A drive belt moves the machine rather than the blades. Common examples are 580364609 at 3/8″ × 63.5″, 574870901 at 1/2″ × 75.38″, and 539110410 at 1/2″ × 105.1″. For these and other drive belt applications, aftermarket Husqvarna drive belts offer a practical replacement option when the original part is hard to source.
Before ordering, use this short check:
Check The Part Number
Look on the old belt, under-hood decal, or parts list.
Confirm The Belt Type
Make sure it is deck, drive, ground drive, or transmission.
Match Width Then Length
Width affects pulley fit. Length affects tensioner travel.
Verify Three Data Points
Part number, function, and size should all line up.
Use Deck Size Last
Deck width is a helpful filter, not the primary ID.
One more detail deserves attention because many quick guides skip it. If a belt keeps jumping off, the belt may not be the only fault. Worn idlers, bent keepers, weak springs, or pulley alignment can cause the same symptom. During belt service, inspect the whole belt path rather than changing the belt alone.
Final Words
The right belt choice comes down to a simple check: part number, belt type, width, and length. A Husqvarna belt size chart makes that check quick and accurate. For replacement parts, FridayParts offers aftermarket parts at affordable prices, a large inventory, and broad compatibility across many heavy equipment brands, which makes sourcing easier when the next belt job comes up.
