Wheels and drive gears · Toro
Replacement Front Wheel Drive Internal Gear59502
Check this against your machine before you buy
Confirm the number on your old part, and check your mower’s serial number as well as its model number. On many mowers the serial range changes what fits.
Fitment
What this fits
| Machine | Serial range | Status | Evidence |
|---|---|---|---|
| Toro 20334 | 315000001–315999999 | Confirmed fit | Listed by Toro as the Replacement Front Wheel Drive Internal Gear on its official parts page for model 20334, serial range 315000001–315999999. |
| Toro 20334 | 316000001–316999999 | Confirmed fit | Listed by Toro as the Replacement Front Wheel Drive Internal Gear on its official parts page for model 20334, serial range 316000001–316999999 — the same range in which the maintenance kit has already changed. |
| Toro 20339 | All | Confirmed fit | Listed by Toro as the Replacement Front Wheel Drive Internal Gear on its official parts pages for model 20339 under both serial ranges we verified, including the 400-series range from which it is absent on the 20334. |
| Toro 20334 | 400000000–401999999 | Not verified | Toro does not list 59502 on its parts page for model 20334, serial range 400000000–401999999; that range shows 8 Inch Front Wheel 137-4833P instead. The gear is still listed for the 20339 in its own 400-series range, so this is a change to this machine rather than the part being withdrawn. |
3 confirmed · 0 conditional · 1 not verified. What these statuses mean
Reference
Specifications
- Listed for
- Toro 20334 serial ranges 315000001–315999999 and 316000001–316999999; Toro 20339 serial ranges 316000001–316999999 and 400000000–401999999
- Wheel diameter
- 8 in.From Toro’s own description: "The 8-in. wheel assembly is extremely durable."
Selection
Choosing this part
Toro’s name for this calls it an internal gear, while its description calls it an 8-in. wheel assembly; we quote both rather than deciding which one you are buying. It appears on the 20334 for the two earlier ranges we opened and not on the 400-series listing, which shows front wheel 137-4833P instead. On the 20339 it is still listed for the 400-series range. We do not know why it differs, only that the listings do.
Where to buy
Buying options
- Check price at Toro (opens in a new tab)
Toro
Price checked at the retailer
Opens a Toro parts listing in which this drive gear is shown.
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Related
Other parts for the same machines
Provenance
Sources
Last verified against these sources on August 17, 2026.
- 1
Parts — 22" Personal Pace Electric Start Mower, model 20334, serial range 315000001–315999999
The Toro Company · Primary source · Accessed August 17, 2026
Toro’s official parts listing for the earliest of the three ranges we verified. Lists 20234 (Engine Maintenance Kit for Briggs & Stratton Engine) and 108-8120 (TRACTION ASSIST KIT [PPG2]). Also lists 38991, 59534P, 59502, 59503 and 490-7462. The range selector on this page names thirteen further serial ranges for the same model number.
- 2
Parts — 22" Personal Pace Electric Start Mower, model 20334, serial range 316000001–316999999
The Toro Company · Primary source · Accessed August 17, 2026
The next published range. Lists 130-8148 (Briggs & Stratton EXi Engine Maintenance Kit Replacement) and 131-4590 (Traction Assist Handle) where the previous range listed 20234 and 108-8120. Still lists 59502; 137-4833P does not appear.
- 3
The Toro Company · Primary source · Accessed August 17, 2026
Lists 20234 (Engine Maintenance Kit for Briggs & Stratton Engine), 38990 (22 Inch Drive Belt for Recycler Mower), 59534P, 59502 and 490-2012. The range selector names eight further serial ranges for this model number.
- 4
The Toro Company · Primary source · Accessed August 17, 2026
Lists 130-8148 in place of 20234, and adds 137-4837P (Replacement 11 in. Rear High Wheel). Still lists 38990 and 59502.
- 5
Parts — 22" Personal Pace Electric Start Mower, model 20334, serial range 400000000–401999999
The Toro Company · Primary source · Accessed August 17, 2026
The later range. Still lists 130-8148 and 131-4590, so the maintenance kit does not change again here. It lists 137-4833P (8 Inch Front Wheel) and does not list 59502 — a second, separate boundary within the same model number.