Motorcycle Tire Pressure: What PSI to Run and How to Check It

Set motorcycle tire pressure to the cold figure on the manufacturer’s placard or in the owner’s manual. Most street bikes fall between 28 and 42 PSI, and the right number for yours is the one listed for your model. The figure molded into the tire sidewall is the tire’s ceiling, so it says little about what to run.

The placard is usually a sticker on the swingarm, the chain guard or the frame near the steering head, and the manual repeats it. The Motorcycle Safety Foundation’s T-CLOCS pre-ride inspection puts tires and pressure in the check made before every ride. Treat a weekly gauge check as the minimum, because a tire can lose 1 to 2 PSI a month with no visible change.

Conti Moto America has a video on the best tire pressure for a motorcycle, which covers the same question as this page.

Video: What's the Best Tire Pressure for my Motorcycle (Conti Moto America)

Is 30, 35, 40 or 90 PSI wrong for your tires?

Each of these depends on your placard. Here is how the numbers compare with the ranges in this guide.

• Is 40 PSI too high for motorcycle tires? Only if your placard says less. 40 PSI sits inside the 28 to 42 PSI range most street bikes use. If the placard says 36 PSI cold, 40 cold is 4 PSI over. A reading of 40 right after a highway run is different: a tire set to 36 PSI cold may show 40 to 42 PSI once it is hot.
• Is 35 PSI too high? Not by itself. It is close to the Kawasaki Ninja 650 figures of 33 PSI front and 36 PSI rear listed further down. On a bike whose placard asks for far less, 35 would be high.
• Is 30 PSI too low for a bike? It is near the bottom of the usual range. Against the Ninja 650 table, 30 PSI would be 3 PSI under the front figure and 6 PSI under the rear. A low tire flexes more and heats up, which is the failure route described below.
• Is 90 PSI too high for bike tires? On a motorcycle, yes, by a wide margin. It is more than double the 42 PSI sidewall example used here and far above the 28 to 42 PSI street range. This page covers motorcycles, so check a bicycle tire’s rating with its maker.
• At what PSI will a tire blow out? None of the sources I reviewed gives a blowout pressure. Tire safety guidance names underinflation as a leading contributor to tread separation and blowouts, because a low tire flexes and heats. The sidewall maximum is a rating limit at maximum load.
• Is it okay to inflate a tire to max PSI? Not as a habit. The maximum is the highest pressure the tire is rated for at its maximum load. Running it shrinks the contact patch, gives a harsher ride and cuts grip on cold or wet surfaces. Use the placard figure, or the loaded figure when you carry a passenger and luggage.

Placard number versus sidewall number

Riders mix up two numbers. The sidewall number is molded into the tire, in text such as MAX. PRESSURE 42 PSI (290 kPa). It states the highest pressure at which the tire is rated to carry its maximum load. Running it because it is printed there is one of the most common pressure mistakes in motorcycling.

The placard number is the recommendation. The manufacturer sets it for that model, with its weight, weight distribution, suspension, intended speeds and stock tire sizes in mind. General industry guidance puts the manufacturer’s specification first and uses tire-maker figures when your fitment differs from stock.

Front and rear are usually different. One common street pattern is 36 PSI front and 42 PSI rear. Some bikes specify equal pressures, and cruisers, sport bikes and adventure bikes all differ, so a figure from a forum post about another model can mislead you.

Miles and Lean publishes OEM-based figures for the Kawasaki Ninja 650, shown below. The page tells riders to check them against the manual and to measure with the tires cold.

Load	Front (bar)	Front (PSI)	Rear (bar)	Rear (PSI)
Solo	2.3	33	2.5	36
Two-up	2.3	33	2.5	36

According to that table, the bike asks for the same pressures solo and two-up. Many manuals do not, as the load section below explains.

Harley-Davidson riders searching for a number should follow the same rule and read the placard and manual for their model. I have no sourced Harley-Davidson figures, so I won’t print one.

If you changed tire sizes or fitted a very different tire type, the placard is a starting point. Ask the tire maker for a recommendation for that fitment on your model. If you can’t find the placard or the manual, most manufacturers post owner’s manuals as free PDFs, and dealers can look up the specification by VIN.

What counts as a cold tire

A cold tire has been parked for at least three hours, or ridden less than about a mile at low speed, and has not been sitting in direct sun.

The distinction matters. Riding warms the air in the tire, and warm air expands. A tire set to 36 PSI cold may show 40 to 42 PSI after highway miles. If you check at a gas station after 40 minutes of riding and let air out to reach the placard figure, the tire will sit several PSI under spec once it cools.

If you have to fill a hot tire on a trip, inflate to the placard figure and recheck cold at the next chance. Never let air out of a hot tire to chase the cold number.

Why pressure drifts with temperature, storage and leaks

Pressure follows ambient temperature. The usual rule of thumb is about 1 PSI per 10°F, or roughly 0.07 bar per 5.5°C.

The first cold snap of autumn shows it. A drop from 75°F to 40°F overnight takes about 3 to 4 PSI from a tire that read right a week earlier. A bike coming out of winter storage may read higher if spring is warmer, but that sits on top of months of slow leakage, so the tire is usually still low. Riding from sea level up a mountain pass nudges the gauge reading up slightly as ambient pressure falls. That is real and rarely worth acting on.

Tires also lose air through the rubber. Normal permeation is generally put at 1 to 2 PSI a month, and tubed tires and older valve stems tend to lose at the upper end of that range. A rider who last checked in August can be several PSI down by November, which is why shoulder-season riders get caught out.

One more pattern to watch is a tire that needs air more often than the other. That points to a leak at the valve core, the bead seal, a corroded rim or a picked-up nail, and it is a repair question. Our guide to motorcycle tire repair kits covers what a roadside kit can and cannot fix.

What low and high pressure do to handling and wear

Too little pressure

A low tire flexes more than designed on every rotation. The flex heats the sidewall and shoulder, and heat damages tires. Tire safety guidance widely names underinflation as a leading contributor to failure, including sudden tread separation and blowouts. Before that point, riders may notice:

• Vague, heavy steering, with the bike slow to turn in and quick to drop into corners.
• Weave or wallow at highway speed, mostly when carrying a passenger or luggage.
• Poorer fuel economy, since a flattened tire resists rolling more.
• Longer stopping distances, because the contact patch deforms and grips less cleanly.

Too much pressure

Overinflation does less harm than underinflation, yet it has costs. The contact patch shrinks and the tire crown rounds out. Expect:

• A harsh ride, with expansion joints and potholes transmitted to the bars and seat.
• Less grip on cold or wet surfaces, where less rubber meets the road.
• A twitchy front end that reacts to every ripple in the road.

Wear patterns are a weak clue

Car tire advice links center wear to overinflation and edge wear to underinflation. Do not carry that over to a motorcycle. On a round-profile tire, riding style drives the wear pattern. Highway miles leave a squared-off center strip. Worn shoulders around a fat center point to aggressive cornering. Pressure contributes, so treat wear as a prompt to check your gauge habits and never as a pressure diagnosis.

Wet roads

Correct pressure keeps the tread grooves in their designed shape, which is how a tire clears water. Underinflation distorts that shape and lowers the pressure the contact patch puts on the road, and both raise hydroplaning risk. If you ride year-round in the wet, pressure discipline matters more than most riders assume. Our guide to motorcycle tires for rain covers the tread-design side of the same problem.

Checking pressure without adding errors

The procedure is short. The mistakes are in the details.

1. Check cold, as defined above.
2. Use your own gauge, and skip the gas station’s. Public air-hose gauges are frequently inaccurate. Choose a motorcycle gauge with an angled chuck, which seats more easily on short valve stems and between spokes.
3. Seat the chuck squarely and quickly. If air hisses out as you attach the gauge, you are losing pressure and the reading will be low. Motorcycle tires hold little air, so a couple of sloppy attempts change the number.
4. Read both tires, including the one that looks fine.
5. Adjust, then verify. After adding or releasing air, take a fresh reading with your own gauge instead of trusting the compressor’s inline gauge.
6. Replace the valve caps. Caps stop grit reaching the valve core, a genuine source of slow leaks.

Digital gauges are easy to read. Quality analog dial gauges are durable and have no battery to fail. Pencil-style gauges cost the least and give the least consistent readings. Check any gauge now and then against a second one. If two differ by 3 PSI, at least one is wrong. Our motorcycle tire pressure gauge guide covers the trade-offs between formats.

Direct tire pressure monitoring (TPMS) is common on higher-end touring and sport-touring bikes and is sold as an aftermarket retrofit. It does not replace a gauge check, but it catches the slow leaks that happen between checks.

Load, passengers and a check schedule

Owner’s manuals often give two pressure sets: one for solo riding, one for rider, passenger and luggage. The loaded rear figure is typically a few PSI higher. Not every bike follows that pattern, as the Ninja 650 table shows.

The loaded adjustment is the one riders skip most. Set pressures for solo commuting, then add a passenger, two panniers and a tail bag for a weekend trip, and the rear tire is underinflated for its load. It carries that load at highway speed in summer heat, and that combination builds the heat that destroys tires. Check the manual for the loaded figure, set it cold before departure, and return to the solo figure once the luggage is off.

When	What to do
Before every ride	Look over both tires per the MSF T-CLOCS check: condition, embedded objects, an obviously low tire. Gauge if in doubt.
Weekly at minimum	Cold gauge check of front and rear.
Before a long or loaded ride	Cold check against the loaded spec in the manual.
After a big temperature swing	Check again; allow for about 1 PSI per 10°F of change.
After storage	Gauge before the first ride; expect a low reading.
Monthly	Look at tread depth, sidewall condition and the DOT date code when you gauge.

Weekly is the floor. The standard riders are taught is a look at the tires before every ride. A motorcycle has only two tires, so a failure at either end is much harder to survive.

Where a street guide runs out

Some pressures cannot come from a general page. Look them up for your own setup.

• Track and race: pressures usually start much lower when cold, because the aim is a target hot pressure. They come from the tire maker’s data sheet for that compound and from track support.
• Off-road and adventure: pressures vary widely with terrain, tire construction and whether you run tubes.
• Non-stock fitment: the tire maker’s recommendation should govern.

RevZilla’s 2 Minute Moto episode covers street, track, adventure and off-road tire pressures in one video.

Video: 2 Minute Moto – Street, Track, ADV, & Off-Road Tire Pressures (RevZilla)

Other questions are matters of preference, and riders disagree.

• Running 1 to 2 PSI under the placard to get extra feel on a spirited ride. Some experienced riders do it. Manufacturers do not endorse it, and it leaves less room once the bike is loaded or the weather turns. Under-spec pressure adds heat and failure risk, so I’d leave the placard figure alone on the street.
• Nitrogen fills. They leak down slightly more slowly and are drier, so pressure is a little steadier. Whether that is worth paying for on a street bike is debatable. It does not replace regular checks, and ordinary air at the right pressure beats nitrogen at the wrong one.
• How often to gauge. Some riders check at every ride, others weekly or every two weeks. Checking more often is never wrong.

The rules of thumb on this page (about 1 PSI per 10°F, 1 to 2 PSI lost a month, underinflation as a leading cause of failure) are long-standing general guidance found in tire care and rider training material. They are not drawn from one published study, and this page is editorial research with no hands-on testing. Your owner’s manual and placard are authoritative for your bike, solo and loaded, and they override anything here.

Featured image: Compressor Tire Pump Tyre Pump Edited 2020 (49906791062) by Tool Dude8mm, CC BY 2.0, via Wikimedia Commons. Cropped.