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MowerPartsLookup

Wheels and drive gears · Toro

Replacement Front Wheel Drive Internal Gear59502

OEMVerified August 22, 2026

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

Machines this part is recorded against, with fitment status and the evidence for each
MachineSerial rangeStatusEvidence
Toro 20334Across this machine’s serial ranges315000001–315999999Confirmed fitListed by Toro as the Replacement Front Wheel Drive Internal Gear on its official parts page for model 20334, serial range 315000001–315999999.
Toro 20334Across this machine’s serial ranges316000001–316999999Confirmed fitListed 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 20339Across this machine’s serial ranges315000001–315999999Confirmed fitListed by Toro as Replacement Front Wheel Drive Internal Gear on its official parts page for model 20339, serial range 315000001–315999999.
Toro 20339Across this machine’s serial ranges316000001–316999999Confirmed fitListed by Toro as Replacement Front Wheel Drive Internal Gear on its official parts page for model 20339, serial range 316000001–316999999.
Toro 20339Across this machine’s serial ranges400000000–401999999Confirmed fitListed by Toro as Replacement Front Wheel Drive Internal Gear on its official parts page for model 20339, serial range 400000000–401999999.
Toro 20339Across this machine’s serial ranges402000000–403599999Confirmed fitListed by Toro as Replacement Front Wheel Drive Internal Gear on its official parts page for model 20339, serial range 402000000–403599999.
Toro 20339Across this machine’s serial ranges403600000–404319999Confirmed fitListed by Toro as Replacement Front Wheel Drive Internal Gear on its official parts page for model 20339, serial range 403600000–404319999.
Toro 20339Across this machine’s serial ranges404320000–405699999Confirmed fitListed by Toro as Replacement Front Wheel Drive Internal Gear on its official parts page for model 20339, serial range 404320000–405699999.
Toro 20339Across this machine’s serial ranges405700000–407819999Confirmed fitListed by Toro as Replacement Front Wheel Drive Internal Gear on its official parts page for model 20339, serial range 405700000–407819999.
Toro 20339Across this machine’s serial ranges407820000–999999999Confirmed fitListed by Toro as Replacement Front Wheel Drive Internal Gear on its official parts page for model 20339, serial range 407820000–999999999.
Toro 20334Across this machine’s serial ranges400000000–401999999Not verifiedToro 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.
Toro 20339Across this machine’s serial ranges314000001–314999999Not verifiedToro does not name Replacement Front Wheel Drive Internal Gear (59502) among the accessories on its parts page for model 20339, serial range 314000001–314999999.
Toro 20334Across this machine’s serial ranges290000001–290999999Not verifiedToro does not name Replacement Front Wheel Drive Internal Gear (59502) among the accessories on its parts page for model 20334, serial range 290000001–290999999.
Toro 20334Across this machine’s serial ranges310000001–310999999Not verifiedToro does not name Replacement Front Wheel Drive Internal Gear (59502) among the accessories on its parts page for model 20334, serial range 310000001–310999999.
Toro 20334Across this machine’s serial ranges311000001–311999999Not verifiedToro does not name Replacement Front Wheel Drive Internal Gear (59502) among the accessories on its parts page for model 20334, serial range 311000001–311999999.
Toro 20334Across this machine’s serial ranges312000001–312999999Not verifiedToro does not name Replacement Front Wheel Drive Internal Gear (59502) among the accessories on its parts page for model 20334, serial range 312000001–312999999.
Toro 20334Across this machine’s serial ranges313000001–313999999Not verifiedToro does not name Replacement Front Wheel Drive Internal Gear (59502) among the accessories on its parts page for model 20334, serial range 313000001–313999999.
Toro 20334Across this machine’s serial ranges314000001–314200000Not verifiedToro does not name Replacement Front Wheel Drive Internal Gear (59502) among the accessories on its parts page for model 20334, serial range 314000001–314200000.
Toro 20334Across this machine’s serial ranges314200001–314999999Not verifiedToro does not name Replacement Front Wheel Drive Internal Gear (59502) among the accessories on its parts page for model 20334, serial range 314200001–314999999.
Toro 20334Across this machine’s serial ranges402000000–404319999Not verifiedToro does not name Replacement Front Wheel Drive Internal Gear (59502) among the accessories on its parts page for model 20334, serial range 402000000–404319999.
Toro 20334Across this machine’s serial ranges404320000–405639613Not verifiedToro does not name Replacement Front Wheel Drive Internal Gear (59502) among the accessories on its parts page for model 20334, serial range 404320000–405639613.
Toro 20334Across this machine’s serial ranges405639614–406577036Not verifiedToro does not name Replacement Front Wheel Drive Internal Gear (59502) among the accessories on its parts page for model 20334, serial range 405639614–406577036.
Toro 20334Across this machine’s serial ranges406577037–999999999Not verifiedToro does not name Replacement Front Wheel Drive Internal Gear (59502) among the accessories on its parts page for model 20334, serial range 406577037–999999999.

10 confirmed · 0 conditional · 13 not verified. What these statuses mean

Reference

Specifications

Listed for
Toro 20334 in 315000001–316999999 only; Toro 20339 from 315000001 to the end of productionThe 20334 half of this was already right; the 20339 half named two of its eight ranges, which was what was open when it was written. Every range of both machines has since been read. Both start listing this part at the same serial, 315000001 — and then diverge completely. On the 20334 it stops after 316999999, and from 400000000 that machine’s listings show front wheel 137-4833P instead. On the 20339 it never stops: Toro lists it in all eight ranges from 315000001 on, and 137-4833P appears on that machine not at all. Same part, same entry serial, opposite endings.
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. All fourteen ranges of the 20334 and all nine of the 20339 have been opened. Both machines begin listing it at 315000001. The 20334 then stops after 316999999 and lists front wheel 137-4833P from 400000000; the 20339 carries it through every range to the end and never lists 137-4833P at all. We do not know why two machines that start the same diverge like that, only that the listings do — which is the reason this site records ranges rather than machines.

Where to buy

Buying options

Which retailers we list, and the order we list them in, is decided on usefulness to the reader — stock depth, shipping, and return terms. It is not decided by commission rate, and no retailer can pay for placement or for a better fitment verdict.

Related

Provenance

Sources

Last verified against these sources on August 22, 2026.

  1. 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. 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. 3

    Parts — 22in Recycler Lawn Mower with SmartStow, model 20339, serial range 315000001–315999999

    The Toro Company · Primary source · Accessed August 20, 2026

    Toro’s official parts listing for this model and serial range, reached from the serial-range selector on the model’s other listings. Within the part categories this site records, its accessory list names 20234, 38990, 59502, 490-2012, and does not name 130-8148, 137-4837P. The page carries further accessories this site holds no record for, among them engine oils, bags and fuel products other than 130-2393.

  4. 4

    Parts — 22" SMARTSTOW Variable Speed High Wheel Lawn Mower, model 20339, serial range 400000000–401999999

    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. 5

    Parts — 22in Recycler Lawn Mower with SmartStow, model 20339, serial range 407820000–999999999

    The Toro Company · Primary source · Accessed August 20, 2026

    Toro’s official parts listing for this model and serial range, reached from the serial-range selector on the model’s other listings. Within the part categories this site records, its accessory list names 38990, 59502, 130-8148, 137-4837P, 490-2012, and does not name 20234. The page carries further accessories this site holds no record for, among them engine oils, bags and fuel products other than 130-2393.

  6. 6

    Parts — 22" SMARTSTOW Variable Speed High Wheel Lawn Mower, model 20339, serial range 316000001–316999999

    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.

  7. 7

    Parts — 22in Recycler Lawn Mower with SmartStow, model 20339, serial range 402000000–403599999

    The Toro Company · Primary source · Accessed August 20, 2026

    Toro’s official parts listing for this model and serial range, reached from the serial-range selector on the model’s other listings. Within the part categories this site records, its accessory list names 38990, 59502, 130-8148, 137-4837P, 490-2012, and does not name 20234. The page carries further accessories this site holds no record for, among them engine oils, bags and fuel products other than 130-2393.

  8. 8

    Parts — 22in Recycler Lawn Mower with SmartStow, model 20339, serial range 403600000–404319999

    The Toro Company · Primary source · Accessed August 20, 2026

    Toro’s official parts listing for this model and serial range, reached from the serial-range selector on the model’s other listings. Within the part categories this site records, its accessory list names 38990, 59502, 130-8148, 137-4837P, 490-2012, and does not name 20234. The page carries further accessories this site holds no record for, among them engine oils, bags and fuel products other than 130-2393.

  9. 9

    Parts — 22in Recycler Lawn Mower with SmartStow, model 20339, serial range 404320000–405699999

    The Toro Company · Primary source · Accessed August 20, 2026

    Toro’s official parts listing for this model and serial range, reached from the serial-range selector on the model’s other listings. Within the part categories this site records, its accessory list names 38990, 59502, 130-8148, 137-4837P, 490-2012, and does not name 20234. The page carries further accessories this site holds no record for, among them engine oils, bags and fuel products other than 130-2393.

  10. 10

    Parts — 22in Recycler Lawn Mower with SmartStow, model 20339, serial range 405700000–407819999

    The Toro Company · Primary source · Accessed August 20, 2026

    Toro’s official parts listing for this model and serial range, reached from the serial-range selector on the model’s other listings. Within the part categories this site records, its accessory list names 38990, 59502, 130-8148, 137-4837P, 490-2012, and does not name 20234. The page carries further accessories this site holds no record for, among them engine oils, bags and fuel products other than 130-2393.

  11. 11

    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.

  12. 12

    Parts — 22in Recycler Lawn Mower with SmartStow, model 20339, serial range 314000001–314999999

    The Toro Company · Primary source · Accessed August 20, 2026

    Toro’s official parts listing for this model and serial range, reached from the serial-range selector on the model’s other listings. Within the part categories this site records, its accessory list names 20234, and does not name 38990, 59502, 130-8148, 137-4837P, 490-2012. The page carries further accessories this site holds no record for, among them engine oils, bags and fuel products other than 130-2393.

  13. 13

    Parts — 22in Recycler Lawn Mower, model 20334, serial range 290000001–290999999

    The Toro Company · Primary source · Accessed August 21, 2026

    Toro’s official parts listing for this model and serial range, reached from the serial-range selector its own page carries. Of the parts this site holds, its accessory list names 108-8120, and does not name 20234, 38991, 59502, 59503, 130-8148, 131-4590, 490-7462, 130-2393, 137-4833P. The page carries further items this site holds no record for, among them engine oils, bags and a striping kit.

  14. 14

    Parts — 22in Recycler Lawn Mower, model 20334, serial range 310000001–310999999

    The Toro Company · Primary source · Accessed August 21, 2026

    Toro’s official parts listing for this model and serial range, reached from the serial-range selector its own page carries. Of the parts this site holds, its accessory list names 108-8120, and does not name 20234, 38991, 59502, 59503, 130-8148, 131-4590, 490-7462, 130-2393, 137-4833P. The page carries further items this site holds no record for, among them engine oils, bags and a striping kit.

  15. 15

    Parts — 22in Recycler Lawn Mower, model 20334, serial range 311000001–311999999

    The Toro Company · Primary source · Accessed August 21, 2026

    Toro’s official parts listing for this model and serial range, reached from the serial-range selector its own page carries. Of the parts this site holds, its accessory list names 108-8120, and does not name 20234, 38991, 59502, 59503, 130-8148, 131-4590, 490-7462, 130-2393, 137-4833P. The page carries further items this site holds no record for, among them engine oils, bags and a striping kit.

  16. 16

    Parts — 22in Recycler Lawn Mower, model 20334, serial range 312000001–312999999

    The Toro Company · Primary source · Accessed August 21, 2026

    Toro’s official parts listing for this model and serial range, reached from the serial-range selector its own page carries. Of the parts this site holds, its accessory list names 108-8120, and does not name 20234, 38991, 59502, 59503, 130-8148, 131-4590, 490-7462, 130-2393, 137-4833P. The page carries further items this site holds no record for, among them engine oils, bags and a striping kit.

  17. 17

    Parts — 22in Recycler Lawn Mower, model 20334, serial range 313000001–313999999

    The Toro Company · Primary source · Accessed August 21, 2026

    Toro’s official parts listing for this model and serial range, reached from the serial-range selector its own page carries. Of the parts this site holds, its accessory list names 20234, 108-8120, and does not name 38991, 59502, 59503, 130-8148, 131-4590, 490-7462, 130-2393, 137-4833P. The page carries further items this site holds no record for, among them engine oils, bags and a striping kit.

  18. 18

    Parts — 22in Recycler Lawn Mower, model 20334, serial range 314000001–314200000

    The Toro Company · Primary source · Accessed August 21, 2026

    Toro’s official parts listing for this model and serial range, reached from the serial-range selector its own page carries. Of the parts this site holds, its accessory list names 20234, 108-8120, and does not name 38991, 59502, 59503, 130-8148, 131-4590, 490-7462, 130-2393, 137-4833P. The page carries further items this site holds no record for, among them engine oils, bags and a striping kit.

  19. 19

    Parts — 22in Recycler Lawn Mower, model 20334, serial range 314200001–314999999

    The Toro Company · Primary source · Accessed August 21, 2026

    Toro’s official parts listing for this model and serial range, reached from the serial-range selector its own page carries. Of the parts this site holds, its accessory list names 20234, 108-8120, and does not name 38991, 59502, 59503, 130-8148, 131-4590, 490-7462, 130-2393, 137-4833P. The page carries further items this site holds no record for, among them engine oils, bags and a striping kit.

  20. 20

    Parts — 22in Recycler Lawn Mower, model 20334, serial range 402000000–404319999

    The Toro Company · Primary source · Accessed August 21, 2026

    Toro’s official parts listing for this model and serial range, reached from the serial-range selector its own page carries. Of the parts this site holds, its accessory list names 38991, 59503, 130-8148, 131-4590, 490-7462, 130-2393, 137-4833P, and does not name 20234, 59502, 108-8120. The page carries further items this site holds no record for, among them engine oils, bags and a striping kit.

  21. 21

    Parts — 22in Recycler Lawn Mower, model 20334, serial range 404320000–405639613

    The Toro Company · Primary source · Accessed August 21, 2026

    Toro’s official parts listing for this model and serial range, reached from the serial-range selector its own page carries. Of the parts this site holds, its accessory list names 38991, 59503, 130-8148, 131-4590, 490-7462, 130-2393, 137-4833P, and does not name 20234, 59502, 108-8120. The page carries further items this site holds no record for, among them engine oils, bags and a striping kit.

  22. 22

    Parts — 22in Recycler Lawn Mower, model 20334, serial range 405639614–406577036

    The Toro Company · Primary source · Accessed August 21, 2026

    Toro’s official parts listing for this model and serial range, reached from the serial-range selector its own page carries. Of the parts this site holds, its accessory list names 38991, 59503, 130-8148, 131-4590, 490-7462, 130-2393, 137-4833P, and does not name 20234, 59502, 108-8120. The page carries further items this site holds no record for, among them engine oils, bags and a striping kit.

  23. 23

    Parts — 22in Recycler Lawn Mower, model 20334, serial range 406577037–999999999

    The Toro Company · Primary source · Accessed August 21, 2026

    Toro’s official parts listing for this model and serial range, reached from the serial-range selector its own page carries. Of the parts this site holds, its accessory list names 38991, 59503, 130-8148, 131-4590, 490-7462, 130-2393, 137-4833P, and does not name 20234, 59502, 108-8120. The page carries further items this site holds no record for, among them engine oils, bags and a striping kit.