John Deere S100 Tire Pressure Chart(For All Series)

Proper tire pressure is crucial for the performance, safety, and longevity of your lawn tractor.

In this post, we provide a complete tire pressure chart for the John Deere S100 series, covering all models from S100 to S180. These recommended pressures help deliver optimal traction, fuel efficiency, cutting precision, and tire life.

John Deere S100 Tire Pressure Chart

Model	Front Tire Size	Rear Tire Size	Recommended Front PSI	Recommended Rear PSI
S100	15×6-6	20×8-8	14 PSI	10 PSI
S110	15×6-6	20×8-8	14 PSI	10 PSI
S120	15×6-6	20×8-8	14 PSI	10 PSI
S130	15×6-6	20×10-8	14 PSI	10 PSI
S140	15×6-6	20×10-8	14 PSI	10 PSI
S160	15×6-6	22×9.5-12	14 PSI	10 PSI
S170	16×6.5-8	22×9.5-12	14 PSI	10 PSI
S180	16×6.5-8	22×9.5-12	14 PSI	10 PSI

Notes:

All values are based on cold tire pressure. Always check pressure before operation, ideally when the tires are cool.

These pressures are suitable for light to moderate-duty residential mowing. If you’re using attachments or operating on steep terrain, consult your owner’s manual for adjustments.

Over-inflation can lead to poor traction and bumpy rides, while under-inflation can cause damage to the tire walls.

Why Tire Pressure Matters for Your John Deere S100 Series Tractor

Before jumping into the chart, let’s quickly understand why tire pressure is so important:

Fuel Efficiency: Under-inflated tires create more rolling resistance, which leads to higher fuel consumption.
Tire Longevity: Improper inflation (over or under) can cause uneven wear, cracks, or premature failure.
Mowing Precision: The right tire pressure helps maintain an even deck height, leading to a uniform grass cut.
Safety & Stability: Correct PSI enhances traction and reduces the risk of tipping or slipping on inclines.

How to Check and Adjust Tire Pressure

Maintaining the correct tire pressure is simple. Here’s how you can do it:

What You’ll Need:

Tire pressure gauge (digital or analog)
Air compressor or manual pump
Valve stem caps

Steps:

Park Safely: Turn off the engine and allow the tires to cool.
Locate Valve Stems: Each tire has a valve stem, unscrew the cap.
Measure Pressure: Use the gauge to check PSI. Compare it to the chart above.
Add or Release Air: Use a compressor to add air or press the valve pin to release some if over-inflated.
Replace Cap: Once correct, screw the cap back on.

Tips for Extending Tire Life

Proper tire pressure is just one part of tire maintenance. Here are some extra tips:

Inspect Often: Check for cracks, punctures, or uneven tread wear.
Rotate Tires: Not common on mowers, but if you’re noticing uneven wear, rotating may help.
Avoid Overloading: Don’t exceed weight limits or tow loads beyond capacity.
Store Indoors: When not in use, store your mower in a garage or shed to protect tires from UV rays and moisture.

Common Signs of Incorrect Tire Pressure

If you’re unsure whether your tires are inflated correctly, here are a few red flags to look out for:

Uneven Cutting: Low pressure on one side may cause the mower deck to tilt.
Bouncy Ride: Over-inflated tires may cause a rough, uncomfortable experience.
Slipping or Spinning: Under-inflated tires lose traction more easily.
Visual Sagging: Tires that appear flattened or bulging may be under- or over-inflated.

FAQs

Can I use the same PSI for all four tires?

No. The front and rear tires are usually different sizes and carry different loads. Always follow the chart for proper PSI for the front and rear.

Can I use car tire pressure specs?

Absolutely not. Lawn tractor tires have different construction and operating pressures. Car tires typically need 30–35 PSI, while mowers require only 10–14 PSI.

What happens if I run the tires at low pressure?

Low pressure can cause the tire to roll off the rim, damage sidewalls, and decrease cutting quality. It’s also a safety hazard.

Does tire pressure change with the seasons?

Yes. Tire pressure can decrease in cold weather and increase in heat. It’s a good idea to check and adjust PSI at the beginning of each mowing season.

What PSI should my John Deere tires be?

For most John Deere riding mowers, including the S100 series:

Front tires: 14 PSI
Rear tires: 10 PSI

Always check your operator’s manual or the sidewall of the tire for exact PSI ratings specific to your model and tire size.

What PSI should my riding mower tires be?

Generally, for standard riding lawnmowers:

Front tires (smaller): 12–16 PSI
Rear tires (larger): 8–12 PSI

Using too much air can reduce traction and cause a rough ride, while too little can damage the tires and affect mowing height.

What is the recommended PSI for tractor tires?

For compact and lawn/garden tractors like John Deere models:

Front tires: 14 PSI (average)
Rear tires: 10 PSI (average)

For larger agricultural tractors, PSI ranges widely—15–35 PSI or more, depending on load and application. Always refer to the manufacturer’s manual.

What oil to use for John Deere S100?

The recommended oil for the John Deere S100 mower is:

John Deere 10W-30 oil (or equivalent)
Use SAE 10W-30 engine oil meeting API SJ or newer

For best results, use John Deere Turf-Gard™ or Plus-4™ oil, especially in temperatures ranging from 0°F to 100°F (-18°C to 38°C).

Oil Capacity: ~1.5 quarts (1.4 L) with filter change.

What is the correct PSI for tires?

The correct PSI depends on the vehicle and tire size:

Cars: Typically 30–35 PSI
Riding Mowers: 10–14 PSI
Bicycles: 40–120 PSI (depending on type)
Tractors: 10–35 PSI (depending on load)

Always refer to the tire sidewall or user manual for exact specifications.

How do I know what PSI my tyres should be?

Check the following:

Tire Sidewall: Look for “Max PSI” , don’t exceed this value.
Owner’s Manual: Lists recommended operating pressures.
Sticker under mower seat or fuel tank: Some riding mowers include a PSI guide there.
Online or manufacturer website: Use model number to look up specifications.

Final words

Your John Deere S100 series mower is a reliable piece of equipment, but like any machine, it requires proper maintenance, starting with your tires. Using the tire pressure chart above, you can ensure your mower performs at its best every time you use it.