Toro 20340
Wheels and drive gears for the Toro 20340
Short answer
One wheel, 137-4833P, and only from 404330000. It is a front wheel — Toro lists no rear wheel for this machine on any run.
Verified options
What we have verified
| Part | Serial range | Status |
|---|---|---|
| 137-4833P8 Inch Front Wheel | 404330000–405699999 | Confirmed fit |
| 137-4833P8 Inch Front Wheel | 405700000–999999999 | Confirmed fit |
| 137-4833P8 Inch Front Wheel | 316000001–316999999 | Not verified |
| 137-4833P8 Inch Front Wheel | 400000000–401499999 | Not verified |
| 137-4833P8 Inch Front Wheel | 401500000–404329999 | Not verified |
What decides it
The numbers that matter here
- Which wheel, and from when
137-4833P, on the runs from 404330000 upward only
The three runs below it name no wheel at all. That is Toro's page getting longer rather than the mower changing — eight other numbers arrive at the same serial.
- If you need a rear wheel
Toro lists none for this machine, on any run
Only a front wheel is offered here. The 20334 and 20339 both list rear wheels; this machine does not, and no page says why.
- Driven or not
Toro designates it an idler — carried, not driven
The public name is 8 Inch Front Wheel and says nothing about it. The designation WHEEL ASM, 8IN [IDLER G2 WHITE, PKG] is on the same page, below the name.
- A wheel on a listing is unusual
Only three machines here list one at all
The 21462, 21464, 21472, 21485 and 21565 name none. So a wheel missing from a listing tells you about the page, not about the machine.
In detail
Choosing wheels and drive gears for this mower
Toro lists one wheel for the 20340: 137-4833P, the 8 Inch Front Wheel, and only on the runs from 404330000 upward. The three runs below name no wheel at all.
**The thing worth knowing is which wheel it is not.** 137-4833P is a front wheel, and **Toro lists no rear wheel for this machine on any run**. If a rear wheel is what you need, this machine's own parts page will not sell you one.
That is not how its two closest relatives behave. The 20334 lists three wheel numbers, front and rear, including the rear-drive wheel 59503. The 20339 lists a rear high wheel and a front drive gear. **Three near-identical 22 in. Toro mowers, and only one of them offers a rear wheel of no kind at all.** Nothing on Toro's pages explains the difference, and we are not going to invent one.
**A second thing Toro publishes and does not say plainly.** The product page for 137-4833P calls it an 8 Inch Front Wheel, which is the name a reader sees. Its internal designation on that same page reads **WHEEL ASM, 8IN [IDLER G2 WHITE, PKG]** — *idler*, meaning a wheel that is carried rather than driven. The customer-facing name says nothing about that, and neither does the parts listing. If you were expecting a driven wheel with a gear in it, this is not one; the 20334's 59502 and 59503 are the numbers that carry gear in their names and descriptions.
Wheels are unusual on this site at all. **The 21462, 21464, 21472, 21485 and 21565 name no wheel of any kind on any listing.** Only the 20334, the 20339 and this machine do. So a wheel appearing against a serial range is already the exception rather than the rule, and its absence from a listing says nothing about whether a mower has wheels — only about what Toro sells on that page.
Toro publishes no diameter beyond the 8 in. in the name, no tread specification and no axle dimension, on the listing or the product page. It tells the reader to verify model and serial before ordering, which is the manufacturer making this site's argument on its own page.
The mistake we see most
Method
How we established this
We opened all five listings Toro publishes for model 20340 and recorded every wheel each names; the runs either side of 404330000 were re-read on 31 August 2026, one naming no wheel and the other naming this one among eight arrivals. That no rear wheel is listed is an absence within a complete accessory list rather than an inference. The idler designation comes from 137-4833P's own product page, opened on 31 August, and the comparison against the 20334 and 20339 from their own listings.
Same machine
Other parts we have verified for the Toro 20340
Other machines
Wheels and drive gears on the other mowers we cover
The answer is not the same on every machine, which is the point of checking rather than assuming.
Provenance
Sources
Last verified against these sources on August 31, 2026.
- 1
Parts — 22in Recycler Lawn Mower with SmartStow, model 20340, serial range 404330000–405699999
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 59534P, 130-8148, 137-4833P, 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.
- 2
Parts — 22in Recycler Lawn Mower with SmartStow, model 20340, serial range 405700000–999999999
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 59534P, 130-8148, 137-4833P, 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.
- 3
Parts — 22in Recycler Lawn Mower with SmartStow, model 20340, serial range 316000001–316999999
The Toro Company · Primary source · Accessed August 16, 2026
Toro’s official parts listing for this model and serial range. Lists 59534P (22 Inch Recycler Blade) and 20234 (Engine Maintenance Kit for Briggs & Stratton Engine).
- 4
Parts — 22in Recycler Lawn Mower with SmartStow, model 20340, serial range 400000000–401499999
The Toro Company · Primary source · Accessed August 16, 2026
Toro’s official parts listing for the later serial range of the same model number. Lists 59534P and 130-8148 (Briggs & Stratton EXi Engine Maintenance Kit Replacement) — note the maintenance kit differs from the earlier range.
- 5
Parts — 22in Recycler Lawn Mower with SmartStow, model 20340, serial range 401500000–404329999
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 59534P, 130-8148, and does not name 20234, 137-4833P, 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.
- 6
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.
- 7
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.
- 8
8 Inch Front Wheel (Part # 137-4833P)
The Toro Company · Primary source · Accessed August 31, 2026
The number requested, no redirect and no supersession line. Internal designation WHEEL ASM, 8IN [IDLER G2 WHITE, PKG] — idler, meaning a wheel that is not driven, which the customer-facing name does not say. Described as a front replacement wheel for Toro walk-behind mowers, with no model named and no Parts & Manuals section on the page. It instructs the reader to verify model and serial before ordering.
- 9
Replacement Front Wheel Drive Internal Gear (Part # 59502)
The Toro Company · Primary source · Accessed August 31, 2026
The number requested, no redirect and no supersession line. Internal designation 8IN GEAR WHL ASM. Described as a drive wheel assembly for 22 in. front wheel drive models, made of 30% glass-filled polypropylene, with an integral gear design, and it says the wheel has multiple applications. Worth reading beside 59503: both are 8 in. gear wheel assemblies, one front and one rear, and the 20334 lists both. Neither page mentions the other and we do not read either as superseding anything. The serial field reads None-None.
- 10
8 inch Replacement Rear-Wheel-Drive Wheel for Lawn Mowers (Part # 59503)
The Toro Company · Primary source · Accessed August 31, 2026
The number requested, no redirect and no supersession line. Internal designation WHEEL GEAR ASM, 8IN [EXTGEAR, PKG]. It publishes a fitment on an axis nothing else here uses: “Replace the rear-wheel-drive wheels on your Toro 22 inch Recycler Lawn Mower model years 2002 through 2008, or 2014 and newer models.” That is a model-year range, not a serial range, and it cannot be reconciled with the serial ranges these listings carry without a mapping Toro does not publish. Also states a claw tread pattern. The serial field reads None-None.