Tire Pressue Chart for Bicycle Wheels: Mountain, Fat Bike, Road, Cyclocross, Gravel

Posted by: NEXTIE Post: 02/09/2024 View: 629 Comments: 0

Optimal bicycle tire pressure balances riding speed, comfort and safety. While the optimal tire pressure value is directly related to many factors, like the riding condition, the system weight (rider weight + bicycle weight + cargo weight), the rim size especially the inner width of the rim, the tire size, the rim bead type (hook or hookless) and the rim strength, weather and temperature.

Hereby we have listed some recommended tire pressure values of our carbon rims for reference. You could also use the tire pressure calculator to get more accurate tire pressure recommendations sram.com/guides/tire/pressure. Or contact us for assistance.

Fat Bike / Tire Pressure

Internal Width	Tire Pressure	Tire Size	System Weight	Reference Model
49mm	16 ~ 24 psi	2.6" ~ 3.8"	85 ~ 134 Kg	Xiphias 55
58 ~ 59mm	8 ~ 20 psi	3.2" ~ 4.5"	85 ~ 134 Kg	Xiphias 65
64mm	7 ~ 19 psi	3.2" ~ 4.6"	85 ~ 140 Kg	Xiphias 70
74mm	6 ~ 19 psi	3.5" ~ 4.8"	85 ~ 146 Kg	Xiphias 80
78 ~ 79mm	6 ~ 19 psi	3.8" ~ 5.0"	85 ~ 157 Kg	Xiphias 85
83mm	5 ~ 15 psi	4.0" ~ 5.2"	85 ~ 200 Kg	Wild Dragon 90
89mm	5 ~ 15 psi	4.2" ~ 5.5"	85 ~ 177 Kg	Xiphias 95
99mm	4 ~ 12 psi	4.6” ~ 5.5"	85 ~ 185 Kg	Xiphias 105
120mm	3 ~ 10 psi	5.2" ~ 6.0"	85 ~ 200 Kg	Drunken Rhinoceros 128

Mountain Bike / Tire Pressure

Riding	Internal Width (Hookless)	Tire Pressure	Tire Size	System Weight	Reference Model
Cross Country	21mm	23 ~ 34 psi	1.8" ~ 2.15"	85 ~ 126 Kg	NXT29RM27
Cross Country	22mm	22 ~ 31 psi	1.8" ~ 2.2"	85 ~ 120 Kg	NXT29UM27
Cross Country	24mm	22 ~ 29 psi	1.9" ~ 2.3"	85 ~ 103 Kg	NXT29UML30
Cross Country	25mm	21 ~ 32 psi	1.9" ~ 2.35"	85 ~ 137 Kg	NXT29UM30
Cross Country	27mm	20 ~ 30 psi	2.0 ~ 2.45"	85 ~ 120 Kg	NXT29XM33
Cross Country	28mm	19 ~ 27 psi	2.1" ~ 2.5"	85 ~ 112 Kg	NXT29UML34
Cross Country	30mm	18 ~ 30 psi	2.1" ~ 2.6"	85 ~ 143 Kg	NXT29VM36U
All Mountain	27mm	23 ~ 35 psi	2.0" ~ 2.45"	85 ~ 119 Kg	NXT29XM33
All Mountain	29mm	22 ~ 34 psi	2.1" ~ 2.6"	85 ~ 132 Kg	NXT29XML35
All Mountain	30mm	20 ~ 33 psi	2.1" ~ 2.7"	85 ~ 143 Kg	NXT29VM36
All Mountain	32mm	19 ~ 30 psi	2.15" ~ 2.9"	85 ~ 132 Kg	NXT29XML38
All Mountain	35mm	18 ~ 29 psi	2.25" ~ 3.1"	85 ~ 145 Kg	NXT29XM41
All Mountain	40mm	17 ~ 25 psi	2.4" ~ 3.3"	85 ~ 136 Kg	NXT29XM46
Enduro	30mm	20 ~ 32 psi	2.1" ~ 2.7"	85 ~ 134 Kg	NXT29XM36
Enduro	32mm	19 ~ 32 psi	2.15" ~ 2.9"	85 ~ 152 Kg	NXT29VM40
Enduro	35mm	18 ~ 29 psi	2.25" ~ 3.1"	85 ~ 134 Kg	NXT29XM41
Enduro	40mm	17 ~ 27 psi	2.4" ~ 3.3"	85 ~ 136 Kg	NXT29XM46
Enduro	45mm	15 ~ 25 psi	2.6" ~ 3.5"	85 ~ 160 Kg	NXT29JF52-II
Down Hill	30mm	21 ~ 34 psi	2.1" ~ 2.7"	85 ~ 136 Kg	NXT29XD39
Down Hill	32mm	20 ~ 32 psi	2.25" ~ 2.9"	85 ~ 156 Kg	NXT29VM40D

Road Bike / Tire Pressure

Riding	Internal Width	Tire Pressure	Tire Size	System Weight	Reference Model
General Road	Hook 19mm	47 ~ 112 psi	23 ~ 42 mm	80 ~ 134 Kg	NXT35RX
General Road	Hook 19mm	47 ~ 122 psi	23 ~ 42 mm	80 ~ 154 Kg	NXT60RX
General Road	Hook 20mm	38 ~ 106 psi	24 ~ 44 mm	80 ~ 180 Kg	NXT20DRX
General Road	Hook 21mm	36 ~ 100 psi	25 ~ 47 mm	80 ~ 134 Kg	NXT30CRX
General Road	Hook 21mm	36 ~ 114 psi	25 ~ 47 mm	80 ~ 169 Kg	NXT65CRX
General Road	Hook 22mm	33 ~ 98 psi	26 ~ 49 mm	80 ~ 200 Kg	NXT22DRX
General Road	Hook 24mm	30 ~ 82 psi	28 ~ 53 mm	80 ~ 138 Kg	NXT29ARX
General Road	Hook 24mm	30 ~ 96 psi	28 ~ 53 mm	80 ~ 173 Kg	NXT65ARX
General Road	Hook 25mm	28 ~ 81 psi	29 ~ 55 mm	80 ~ 139 Kg	NXT30CGX
General Road	Hook 25mm	28 ~ 91 psi	29 ~ 55 mm	80 ~ 169 Kg	NXT60CGX
General Road	Hookless 25mm	29 ~ 60 psi	33 ~ 50 mm	80 ~ 138 Kg	NXT29ARX-Z
General Road	Hookless 25mm	29 ~ 62 psi	33 ~ 50 mm	80 ~ 163 Kg	NXT54ARX-Z

Cyclocross Bike / Tire Pressure

Riding	Internal Width	Tire Pressure	Tire Size	System Weight	Reference Model
Cyclocross	Hook 19mm	27 ~ 50 psi	28 ~ 40 mm	80 ~ 134 Kg	NXT35RX
Cyclocross	Hook 19mm	27 ~ 54 psi	28 ~ 40 mm	80 ~ 154 Kg	NXT60RX
Cyclocross	Hook 20mm	26 ~ 53 psi	28 ~ 40 mm	80 ~ 180 Kg	NXT20DRX
Cyclocross	Hook 21mm	27 ~ 52 psi	28 ~ 40 mm	80 ~ 134 Kg	NXT30CRX
Cyclocross	Hook 21mm	27 ~ 59 psi	28 ~ 40 mm	80 ~ 169 Kg	NXT65CRX
Cyclocross	Hook 22mm	25 ~ 51 psi	28 ~ 40 mm	80 ~ 200 Kg	NXT22DRX
Cyclocross	Hook 24mm	25 ~ 50 psi	28 ~ 40 mm	80 ~ 138 Kg	NXT29ARX
Cyclocross	Hook 24mm	25 ~ 57 psi	28 ~ 40 mm	80 ~ 173 Kg	NXT65ARX
Cyclocross	Hook 25mm	24 ~ 48 psi	29 ~ 40 mm	80 ~ 139 Kg	NXT30CGX
Cyclocross	Hook 25mm	24 ~ 55 psi	29 ~ 40 mm	80 ~ 169 Kg	NXT60CGX
Cyclocross	Hook 29mm	24 ~ 38 psi	33 ~ 40 mm	80 ~ 154 Kg	NXT45AGX
Cyclocross	Hookless 25mm	24 ~ 38 psi	33 ~ 40 mm	80 ~ 138 Kg	NXT29ARX-Z
Cyclocross	Hookless 25mm	24 ~ 40 psi	33 ~ 40 mm	80 ~ 163 Kg	NXT54ARX-Z
Cyclocross	Hookless 30mm	22 ~ 30 psi	38 ~ 40 mm	80 ~ 156 Kg	NXT45AGX-Z

Gravel Bike / Tire Pressure

Riding	Internal Width	Tire Pressure	Tire Size	System Weight	Reference Model
Gravel	Hook 20mm	29 ~ 82 psi	28 ~ 50 mm	80 ~ 180 Kg	NXT20DRX
Gravel	Hook 21mm	29 ~ 78 psi	28 ~ 52 mm	80 ~ 134 Kg	NXT30CRX
Gravel	Hook 21mm	29 ~ 89 psi	28 ~ 52 mm	80 ~ 169 Kg	NXT65CRX
Gravel	Hook 22mm	27 ~ 79 psi	28 ~ 55 mm	80 ~ 200 Kg	NXT22DRX
Gravel	Hook 24mm	27 ~ 74 psi	28 ~ 60 mm	80 ~ 138 Kg	NXT29ARX
Gravel	Hook 24mm	27 ~ 85 psi	28 ~ 60 mm	80 ~ 173 Kg	NXT65ARX
Gravel	Hook 25mm	26 ~ 70 psi	29 ~ 62 mm	80 ~ 139 Kg	NXT30CGX
Gravel	Hook 25mm	26 ~ 82 psi	29 ~ 62 mm	80 ~ 169 Kg	NXT60CGX
Gravel	Hook 29mm	20 ~ 60 psi	33 ~ 72 mm	80 ~ 154 Kg	NXT45AGX
Gravel	Hookless 25mm	22 ~ 57 psi	33 ~ 62 mm	80 ~ 138 Kg	NXT29ARX-Z
Gravel	Hookless 25mm	22 ~ 59 psi	33 ~ 62 mm	80 ~ 163 Kg	NXT54ARX-Z
Gravel	Hookless 30mm	19 ~ 48 psi	38 ~ 75 mm	80 ~ 156 Kg	NXT45AGX-Z

Generally, higher tire pressure could make riding easier and thus increase riding speed especially on smooth road, while lower tire pressure could improve comfort and grip. We come up with the following recommendations for bicycle tire pressure.

1. Rougher the terrain, lower the required tire pressure.

Smooth paved roads favor higher pressure for speed, while rough terrain necessitates lower pressure for better traction and control. Mountain bikes, with their wider and knobby tires designed for tackle rough terrain, including loose dirt, rocks, roots, and even jumps, need a lower tire pressure. Lower pressure improves traction and shock absorpition, essential for handing rough and uneven surfaces. Road bike require higher pressure beacuse they are designed to go faster and smoother on even surfaces.

2. Heavier the system weight, higher the required tire pressure.

Bicycle wheels generally have an important parameter, which is the maximum system weight. Heavier riders may require higher tire pressures to prevent excessive tire deformation and improve efficiency. For about every 5kg of weight, add or subtract 2 PSI for road bikes and 1 PSI for MTB or gravel bikes, but always within the ranges of recomendations.

3. Wider the tire, lower the required tire pressure.

If you use a wider tire, you usually need a wider rim, the required tire pressure should be lower. Generally the tire pressure of fat bike is usually lower than that of mountain bicycle, and the tire pressure of mountain bicycle is lower than that of gravel or road bikes. A wider tire with a lower tire pressure lower tire pressure could improve comfort and grip.

4. A hookless rim needs lower tire pressure than a hook rim.

Tubeless systems often allow for lower tire pressures without the risk of pinch flats, enhancing grip and ride quality.

5. The strength of the rims and the quality of the tires.

If your rims are in high strength and your tires are in great quality, you could run lower or higher tire pressure (wider range of tire pressure) to cope with more diverse riding conditions.

6. Weather and temperature.

Weather and temperature also play a role in determining optimal tire pressure. For example, lower tire pressure should be used in wet conditions, as lower tire pressure provides better grip and ensures safe riding in wet conditions. In higher temperatures, we should also lower the tire pressure a little to avoid blowouts.

F.A.Q.

1. Why is the right tire pressure important?

Too high or too low tire pressure will not only affect the service life of the tires and rims and the riding experience, like poor driving strbility in inclined positiion or poor damping, but also affect the safety of riding, such as tire blowouts or insufficient grip.

2. How to check your bicycle tire pressure?

To measure the tyre pressure in your tyre, you’ll need a tyre pressure gauge, or a pump fitted with a pressure gauge. When connected to the valve on your bike’s tyre, you’ll see what pressure the tyre is currently inflated to.

3. How to caculate the tire pressure that suit for your bike?

You could refer to the Bicycle Tire Pressue Chart above, or use tire pressure calculator:

* System Weight = Rider Weight + Cargo Weight + Bicycle Weight

* Tire Pressure Calculator sram.com/guides/tire/pressure.

Tags: bicycle tire pressure

Tire Pressue Chart for Bicycle Wheels: Mountain, Fat Bike, Road, Cyclocross, Gravel

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