Tire Valve Stem Size Chart: Dimensions, Lengths and Fitment

Short answer: A valve stem size has two parts. The first is the diameter of the rim valve hole the stem must seal in. The second is the stem length that must reach through the rim and leave enough exposed to inflate. Most passenger cars use valves for a 0.453 in (11.5 mm) rim hole, in effective lengths of roughly 0.88 to 2 in. Some wheels use a 0.625 in (about 16 mm) hole. On bicycles, Presta valves fit an approximately 6.5 mm hole and Schrader valves an approximately 8.5 mm hole. Valve length should exceed rim depth by about 15–20 mm, so a 50 mm deep rim usually needs a 70 mm valve. The numbers on the tire sidewall do not tell you the valve size directly. They tell you the rim diameter and the pressure range, which narrow down the right valve.

What do the numbers on the tire sidewall tell you about valve stems?

The tire sidewall describes the tire's size and ratings, not the valve. Some values still matter for valve choice, especially rim diameter and maximum inflation pressure. The valve hole and valve stem belong to the wheel (rim), so the final fitment check is always made on the rim.

Car tire sidewall: what each marking means

A typical passenger car marking such as 225/45R17 94V contains dimensions, a ratio, a construction code and performance ratings:

• 225 is the nominal section width in millimetres. It is a dimension.
• 45 is the aspect ratio. The sidewall height is 45% of the section width. It is a ratio, not a measurement in millimetres.
• R means radial construction.
• 17 is the rim diameter in inches. It is a dimension, in a different unit from the width.
• 94 is the load index, a coded rating for the maximum load per tire.
• V is the speed rating, a coded maximum sustained speed.
• MAX PRESS, printed elsewhere on the sidewall in psi and kPa, is the tire's maximum cold inflation pressure. It is not the recommended pressure for your vehicle.

For valve stems, the most useful values are the maximum pressure and, indirectly, the speed rating and tire type. Rubber snap-in valves of the common TR400 series are generally rated for cold inflation pressures up to 65 psi. Light truck (LT) tires and other high-pressure tires may call for high-pressure snap-in valves or metal clamp-in valves. The rim diameter (17 in) does not change the valve hole size. A 15 in and a 20 in wheel can use the same 0.453 in hole.

Bicycle tire and rim markings

Bicycle tires often carry two size systems. Examples are 700x25c and the ETRTO code 25-622, or 29x2.2 and 56-622. In the ETRTO code, the first number is the nominal tire width in millimetres. The second is the bead seat diameter in millimetres, which is the size that must match the rim. Rims are often marked with a code such as 622x19C, meaning a 622 mm bead seat diameter and a 19 mm internal width.

None of these tire numbers gives rim depth, the profile height that sets the valve length. Rim depth usually appears in the rim's specifications or model name, for example a 45 mm or 50 mm deep carbon rim. You can also measure it directly.

Is the valve stem on the tire or the rim?

On a tubeless tire, the valve stem is mounted in the rim valve hole, not on the tire. This applies to almost all modern car tires and to tubeless bicycle setups. The tire only seals against the rim's bead seats. On a tire with an inner tube, the valve is part of the tube and passes through the rim valve hole. In both cases, the rim decides which stem body diameter fits and how long the stem must be.

On cars, the valve mounting location is a hole in the wheel's centre well, often drilled at an angle. On many vehicles, the tire pressure monitoring system (TPMS) sensor is attached to the inner end of the valve. TPMS valves therefore have to match both the rim hole and the sensor design.

How tire size affects geometry, and why it does not change valve size

Width, aspect ratio and rim diameter together determine a tire's calculated sidewall height, overall diameter and circumference. The formulas are simple:

1. Sidewall height (mm) = section width (mm) × aspect ratio ÷ 100
2. Overall diameter (mm) = rim diameter (in) × 25.4 + 2 × sidewall height
3. Circumference (mm) = overall diameter × π (about 3.1416)

Tire size	Sidewall height	Overall diameter	Circumference
225/45R17	101.3 mm	634.3 mm (24.97 in)	about 1,993 mm
225/50R17	112.5 mm	656.8 mm (25.86 in)	about 2,063 mm
245/40R18	98.0 mm	653.2 mm (25.72 in)	about 2,052 mm

In the first two rows, raising the aspect ratio from 45 to 50 at the same width and rim adds about 11 mm of sidewall. It adds about 22 mm of overall diameter and about 70 mm of circumference. The 245/40R18 shows how a larger rim with a lower profile can end up close to a smaller rim's overall diameter.

For a bicycle, a rough estimate treats tire height as about equal to tire width. A 25-622 tire then has a calculated overall diameter of about 622 + 2 × 25 = 672 mm and a circumference of about 2,111 mm.

These are calculated nominal values. The actual dimensions of a mounted tire vary with brand, model, rim width, inflation pressure and load. Matching calculated diameters does not prove that a tire fits a vehicle. Load rating, speed rating, clearance and the vehicle maker's approved sizes still apply.

For valve stems, the practical point is that tire profile does not determine valve length. A taller sidewall does not require a longer valve, because the valve is measured through the rim, not the tire. What changes the requirement is the wheel design: hole diameter, rim thickness at the hole, how far the hole sits behind the spokes or wheel face, and (on bicycles) rim depth.

Car tire valve stem sizes chart

Car tire valve stem sizes are identified by industry valve stem designations such as TR412 or TR413. Each designation combines a rim hole diameter, a mounting style and a length. For a passenger car, you need three things: the rim valve hole size (usually 0.453 in or 0.625 in), the valve type (snap-in or clamp-in) and an effective length that clears the wheel face and gives pump access.

Designation	Type	Rim valve hole	Typical effective length	Common use
TR412	Rubber snap-in	0.453 in (11.5 mm)	about 0.88 in (22 mm)	Short stem for wheels with a shallow, exposed hole
TR413	Rubber snap-in	0.453 in (11.5 mm)	about 1.25 in (32 mm)	The most common passenger car length
TR414	Rubber snap-in	0.453 in (11.5 mm)	about 1.5 in (38 mm)	Wheels where the hole sits further back
TR418	Rubber snap-in	0.453 in (11.5 mm)	about 2 in (51 mm)	Deep-dish or recessed hole locations
TR415	Rubber snap-in	0.625 in (about 16 mm)	about 1.25 in (32 mm)	Wheels drilled with the larger hole
TR600HP series	High-pressure snap-in	0.453 in (11.5 mm)	varies by version	Higher cold pressures; commonly rated up to 100 psi
TR416 and similar	Metal clamp-in	0.453 in (11.5 mm)	varies by version	High-pressure or high-performance applications

The lengths shown are typical. Manufacturers sometimes list overall length instead of effective length, so compare the same measurement when you check a catalogue. Effective length is measured from the rim seating surface to the tip of the valve. It is the part that sticks out of the wheel.

Tire valve stem diameter: what "0.453" and "0.625" mean

The figures 0.453 in and 0.625 in describe the rim valve hole diameter the rubber body or clamp-in seal is designed for, not the visible threaded tip. The threaded tip of a standard car (Schrader-type) valve is about 0.305 in (7.7 mm) in diameter on both sizes. Because the tips look the same, you cannot tell the rim hole size by looking at the valve cap end.

A snap-in valve made for a 0.453 in hole will not seal reliably in a 0.625 in hole. A 0.625 in valve cannot be pulled properly into a 0.453 in hole. Smaller rim holes also exist on some motorcycle, ATV and small-diameter wheels, so measure the hole rather than assuming a car standard.

Snap-in vs clamp-in valves

Snap-in valves have a rubber body that is pulled through the rim hole and held by a moulded groove. They are inexpensive, common and suited to normal passenger car pressures and speeds. Clamp-in valves are metal stems sealed with a grommet and secured by a nut on the outside of the rim. They suit higher pressures, higher-performance use and many TPMS sensors. Clamp-in valves must match the rim hole diameter and the rim thickness at the hole. They also need to be tightened to the torque the manufacturer specifies.

Bicycle valve stem dimensions: diameter and length

Bicycle valves are sized by valve type, which sets the stem body diameter and rim hole size, and by valve length, which must suit rim depth.

Valve type	Stem body diameter	Typical rim valve hole	Fitment note
Presta	about 6 mm	about 6.5 mm	Standard on road, gravel and most performance rims; common for tubeless
Schrader (bicycle)	about 8 mm	about 8.5 mm	Same valve type as cars, but on bicycles it goes on an inner tube or a narrow tubeless stem
Dunlop / Woods	about 8 mm base	about 8.5 mm	Uses the same hole size as bicycle Schrader

A Presta valve placed in a rim drilled for Schrader leaves a gap that lets the valve move and can damage the tube. A hole-reducing grommet or adapter is normally used in that case. A Schrader valve will not pass through a Presta-sized hole unless the rim is drilled out. Not all rims are suitable for drilling.

Valve stem length for rims: how to choose

Choose a bicycle valve length that equals rim depth plus about 15–20 mm. A Presta pump head generally needs around 15 mm of exposed stem to clamp securely. More length makes inflation easier, especially with pumps that have a deep head. If you use a lockring, it also needs some exposed thread.

Bicycle valve stem length chart by rim depth

Rim depth	Minimum practical valve length	Comfortable valve length
Up to about 25 mm	40 mm	40–48 mm
30 mm	45–48 mm	50 mm
35 mm	50 mm	60 mm
40 mm	55–60 mm	60 mm
45 mm	60 mm	65–70 mm
50 mm	65 mm	70 mm
60 mm	75 mm	80 mm
80 mm or deeper	100 mm	100 mm or a shorter valve with an extender

The chart is a rule-of-thumb starting point, not a manufacturer's specification. Exposed length also depends on how far the valve base sits below the rim's top edge and on how the valve maker measures length.

What size valve stem for 50mm rims?

For a 50 mm deep rim, a 70 mm valve is the usual choice because it leaves about 20 mm exposed. A 60 mm valve leaves only about 10 mm, which is often too short for a pump head to grip reliably. An 80 mm valve also works if you prefer extra length.

Valve stem length for 40mm, 45mm and 60mm rims

• 40 mm rim: a 60 mm valve gives about 20 mm exposed and is the common pairing.
• 45 mm rim: a 60 mm valve leaves about 15 mm, which is workable but tight. A 65–70 mm valve is easier to use.
• 60 mm rim: an 80 mm valve is the usual choice. A 60 mm valve would barely clear the rim.

Tubeless vs inner tube valve length

Tubeless valve stem sizes are measured from the rubber base, which seats in the rim bed, to the tip. The base shape (conical, flat or rim-specific) should match the rim bed so the valve seals. Inner tube valve length is usually measured from the tube surface. Because the tube sits slightly higher in the rim well than a tubeless base, an inner tube valve can end up with marginally less exposed length on the same rim.

When to use valve extenders

Valve extenders add length to a valve that is too short for a deep rim. Presta extenders usually thread onto the valve tip, sometimes with the valve core removed and refitted at the top of the extender. They are useful on very deep rims or when you already have shorter valves. A single valve of the correct length is simpler, has fewer joints that could leak, and is easier to fill with tubeless sealant.

How to measure for the right valve stem

Measuring the rim directly is the most reliable way to choose a valve.

1. Identify the valve type. Note whether the existing valve is Presta, Schrader, snap-in or clamp-in, and whether a TPMS sensor is attached.
2. Measure the rim valve hole. Use calipers on the empty rim. On cars, compare the result with 0.453 in (11.5 mm) and 0.625 in (about 16 mm). On bicycles, compare it with about 6.5 mm (Presta) and about 8.5 mm (Schrader).
3. For clamp-in valves, measure rim thickness at the hole. The valve's seal and nut must suit that thickness.
4. Measure depth. On a bicycle, measure rim depth from the rim's outer edge to the spoke-face surface. On a car, check how far the hole sits behind the wheel face, so the effective length clears the face and remains easy to reach.
5. Check pressure needs. Compare the tire's MAX PRESS and the vehicle's recommended pressure with the valve's pressure rating.
6. Select the stem. Use the charts above to pick a designation or length, and confirm against the valve manufacturer's listing.

If you want a tire valve stem sizes chart as a PDF for the workshop, the tables in this article are self-contained and can be printed or saved together with your own rim measurements.

Limits of valve size charts

A valve size chart narrows the choice but cannot replace a check on the actual wheel. Measuring conventions differ between manufacturers, wheels with the same tire size can have different hole positions, and TPMS valves are often specific to a sensor family. Tire sidewall numbers help you understand rim diameter, pressure and ratings, and simple geometry shows how tire sizes compare. Valve fitment itself is decided by rim hole diameter, rim thickness, rim depth or hole recess, and the pressure the valve must hold.