Learning how to change lawn mower tires is a fundamental skill for any homeowner. Changing a flat or worn lawn mower tire is a repair that can extend the life of your equipment and save you a significant amount of money compared to a shop visit. With a few basic tools and a bit of patience, you can complete this task in under an hour and get back to maintaining your yard.
This guide will walk you through the entire process, from gathering your tools to the final installation. We’ll cover both push mower and riding mower tires, as the steps are similar but have key differences in scale. You’ll learn how to safely remove the wheel, separate the tire from the rim, and mount the new one correctly.
How To Change Lawn Mower Tires
Before you start, it’s crucial to gather all necessary tools and materials. Having everything at hand will make the job smoother and safer. The last thing you want is to have the mower half-disassembled and realize you’re missing a key item.
Tools And Materials You Will Need
Most of these items are common in a basic home toolkit. If you don’t have them, they are a worthwhile investment for many DIY repairs.
- A sturdy jack or set of jack stands (for riding mowers)
- Wrench or socket set that fits your mower’s axle nuts
- Flat-head and Phillips screwdrivers
- Tire irons or sturdy pry bars (at least two)
- A bucket of soapy water or commercial tire lubricant
- A valve core tool (often included with a new tube)
- A reliable air compressor or tire pump with a gauge
- Your replacement tire and/or inner tube
- Work gloves and safety glasses
Safety Precautions Before You Begin
Safety should always be your first priority. A lawn mower is heavy equipment, and improper handling can lead to injury or damage.
- Disconnect the spark plug wire on any powered mower to prevent accidental starting.
- If working on a riding mower, ensure the parking brake is firmly engaged.
- Always jack up the mower securely and use jack stands. Never rely solely on a hydraulic jack.
- Wear safety glasses to protect your eyes from debris and gloves to shield your hands.
- Work in a well-lit, flat, and clear area like a driveway or garage floor.
Step-By-Step Tire Removal Process
With your tools ready and safety measures in place, you can begin the removal process. Follow these steps carefully.
Step 1: Secure And Lift The Mower
For a push mower, simply tip it onto its side, ideally with the air filter and carburetor facing up to prevent oil leaks. For a riding mower, use your jack to lift the front or rear end until the wheel is off the ground. Place jack stands under the frame for solid support before crawling underneath.
Step 2: Remove The Wheel From The Axle
Locate the axle nut or bolt holding the wheel in place. It may be covered by a dust cap you can pop off with a screwdriver. Using the correct size wrench or socket, loosen and remove the nut. You might need to hold the wheel still or use a penetrating oil if the nut is rusted. Slide the wheel straight off the axle.
Step 3: Deflate The Tire Completely
If the tire still has air, you must deflate it fully. Use your valve core tool to unscrew and remove the valve core from the stem. This lets all the air out quickly and makes the next steps much easier. Press on the tire to ensure no air remains.
Step 4: Break The Tire Bead
The bead is the tight seal where the tire’s edge meets the wheel rim. You need to break this seal. Lay the wheel on the ground. Carefully step on the sidewall of the tire near the rim, or use a clamp or a specialized bead breaker tool. Work your way around the tire until the bead is separated from the rim on both sides. Sometimes applying soapy water around the bead can help.
Step 5: Pry The Tire Off The Rim
This is where tire irons are essential. Insert the flat end of one tire iron between the tire bead and the rim. Lever it down to pull a section of the bead over the rim’s edge. Hold that position and insert a second tire iron a few inches away. Work your way around the wheel, prying the bead over the edge until one whole side is free. Then, you can usually pull the rest of the tire off by hand. If there’s an inner tube, remove it now.
Step-By-Step Tire Installation Process
Mounting the new tire is essentially the reverse of removal, but requires care to avoid pinching the tube or damaging the bead.
Step 1: Prepare The New Tire And Rim
Inspect the rim for any rust, dents, or debris and clean it thoroughly. If you’re using a new inner tube, slightly inflate it just enough to give it shape—this prevents it from twisting or getting pinched. Apply a generous amount of soapy water or tire lubricant to the new tire’s bead and the rim’s edge. This lubrication is critical for a smooth installation.
Step 2: Mount The First Bead
Place the new tire on the rim at an angle. You can often start by hand, pushing one section of the tire’s bead into the center well of the rim. The center is the deepest part, giving you more slack. Work your way around, using your hands to push the bead over the rim until the first side is fully seated. If it gets tough, you can gently use a tire iron, but be very cautious not to damage the bead.
Step 3: Insert The Inner Tube (If Applicable)
If your tire uses a tube, place it inside the tire now. Ensure it’s not twisted. Align the valve stem with the hole in the rim and push it through. This helps keep the tube positioned correctly during the rest of the install.
Step 4: Mount The Second Bead
This is the most challenging part. Start opposite the valve stem. Use your hands to work the second bead onto the rim. As it gets tighter, you will need to use your tire irons. Carefully pry a small section over the rim, then move a few inches over and repeat. The lubrication is key here. Go slowly to avoid pinching the tube between the iron and the rim, which would cause an immediate flat.
Step 5: Inflate And Seat The Bead
Before fully inflating, ensure the tire is centered on the rim and the valve stem is straight. Inflate the tire slowly. You will hear loud pops or snaps as the bead seats correctly against the rim. If the bead won’t seat, deflate, apply more soapy water, and try again. Inflate to the PSI recommended on the tire’s sidewall. Finally, re-install the valve core if you removed it and check for leaks with soapy water.
Step 6: Reattach The Wheel To The Mower
Slide the wheel back onto the axle, making sure any washers or spacers are in the correct order. Hand-tighten the axle nut first, then use your wrench to tighten it securely. Do not over-tighten, as this can damage the bearings. For a riding mower, lower it off the jack stands carefully.
Troubleshooting Common Issues
Even with careful work, you might encounter a few problems. Here’s how to handle them.
- Tire Won’t Inflate or Holds Air Poorly: The bead may not be seated. Deflate, lubricate, and reinflate. Check for a damaged valve core or a pinched/punctured inner tube.
- Wheel Wobbles After Installation: The axle nut may be loose, the wheel may not be fully seated on the axle, or the tire may not be centered on the rim. Re-check these points.
- Tire Irons Are Damaging the Rim: Use plastic tire levers or wrap the metal ends of your irons with electrical tape to prevent scratches and gouges.
- Bead Is Impossible to Seat: Ensure you are using enough lubricant. Sometimes using a ratchet strap around the tire’s circumference can help force the bead outward toward the rim.
FAQ About Changing Lawn Mower Tires
Can I Patch A Lawn Mower Tire Instead Of Replacing It?
Yes, in many cases. Small punctures in an inner tube can be patched with a standard tire repair kit. However, if the tire sidewall is cracked or the tread is completely worn, replacement is the safer and more reliable option.
How Do I Know If I Need A New Tire Or Just A New Tube?
Inspect the tire carefully. If the rubber is cracked, dry-rotted, or the tread is bald, you need a new tire. If the tire looks good but won’t hold air, the inner tube is likely the problem. Some lawn mower tires are tubeless, so check your model first.
What Is The Correct PSI For My Lawn Mower Tires?
The proper tire pressure is almost always printed on the sidewall of the tire itself. It typically ranges from 10 to 20 PSI. Never inflate to the maximum pressure listed on a car tire, as this is much too high and can cause a blowout.
Are Riding Mower Tires Harder To Change Than Push Mower Tires?
The process is fundamentally the same, but the physical size and weight of riding mower tires make them more challenging. You will need a good jack and likely more leverage with your tools. The principles of breaking the bead and prying the tire off remain identical.
Where Can I Buy Replacement Lawn Mower Tires?
You can find them at lawn equipment dealers, major hardware stores, and online retailers. Make sure to know your tire’s dimensions, which are printed on the sidewall (e.g., 15×6.00-6). Ordering the correct size is essential for a proper fit.
Changing your own lawn mower tires is a satisfying and economical DIY project. By following these clear steps and taking your time, you can ensure a safe and successful repair. Regularily checking your tire pressure and condition can also prevent flats and wear, keeping your mower running smoothly for seasons to come. With this knowledge, you’re equipped to handle this common maintenance task confidently.