Calculate the optimal front and rear tyre pressure for your road bike based on your total system weight and tyre width. This road bike tyre pressure calculator (rider weight based) gives separate recommendations for front and rear tyres, because weight distribution means the rear tyre should run 4 to 12 percent higher pressure than the front, rising with tyre width. Works for clincher and tubeless setups, tyre widths from 23mm to 38mm, and smooth to rough road surfaces.
What PSI should I run on my road bike? For a 75 kg rider on 28mm clincher tyres: 75 PSI front, 80 PSI rear. On tubeless 28mm: 68 PSI front, 73 PSI rear. Wider tyres need lower pressure. The rear tyre runs 5 to 15% higher than the front due to weight distribution (60% rear, 40% front). Enter your weight and tyre width below for a precise front and rear recommendation.
This is the inside width of the rim channel, where the tyre bead sits, not the outside width of the rim. Your wheel specification lists it, or measure between the inner walls.
Recommended Pressure
FRONT
73PSI
5 bar
REAR
78PSI
5.4 bar
Above the 72.5 psi limit for hookless rims. Check your rim type before inflating.
This calculator is for reference only. Results are based on standard formulas and may not account for individual variation. Always use your own judgement when making equipment decisions.
Road Bike Tyre Pressure Chart: PSI by Rider Weight
Road bike tyre pressure chart (also a road bike tire pressure chart for US readers) and road bike tire pressure by weight. Front/Rear PSI broken down by rider weight and tyre width (23 to 38mm). Separate tables for clincher and tubeless setups.
Clincher tyres: tyre pressure road bike PSI
Rider Weight
23mm F/R
25mm F/R
28mm F/R
32mm F/R
35mm F/R
38mm F/R
55 kg / 121 lbs
85/90 PSI
75/80 PSI
65/70 PSI
55/60 PSI
50/55 PSI
47/52 PSI
65 kg / 143 lbs
90/95 PSI
80/85 PSI
70/75 PSI
60/65 PSI
54/59 PSI
51/56 PSI
75 kg / 165 lbs
95/100 PSI
85/90 PSI
75/80 PSI
65/70 PSI
58/63 PSI
54/59 PSI
85 kg / 187 lbs
103/108 PSI
93/98 PSI
83/88 PSI
72/78 PSI
64/70 PSI
59/65 PSI
95 kg / 209 lbs
110/115 PSI
100/105 PSI
90/95 PSI
78/85 PSI
69/76 PSI
63/70 PSI
105 kg / 231 lbs
115/120 PSI
105/110 PSI
95/100 PSI
85/90 PSI
75/80 PSI
68/73 PSI
Tubeless tyres: run 5-10 PSI lower
Rider Weight
25mm F/R
28mm F/R
32mm F/R
35mm F/R
38mm F/R
55 kg / 121 lbs
68/73 PSI
58/63 PSI
48/53 PSI
43/48 PSI
40/45 PSI
65 kg / 143 lbs
73/78 PSI
63/68 PSI
53/58 PSI
47/52 PSI
44/49 PSI
75 kg / 165 lbs
78/83 PSI
68/73 PSI
58/63 PSI
51/56 PSI
47/52 PSI
85 kg / 187 lbs
86/91 PSI
76/81 PSI
65/71 PSI
57/63 PSI
52/58 PSI
95 kg / 209 lbs
93/98 PSI
83/88 PSI
71/78 PSI
62/69 PSI
56/63 PSI
105 kg / 231 lbs
98/103 PSI
88/93 PSI
78/83 PSI
68/73 PSI
61/66 PSI
Front/Rear values shown. Rear is always higher due to weight distribution (~60% rear, ~40% front). Tubeless runs 5-10 PSI lower than clincher for the same tyre width because the supple casing deforms better. Values are starting points. Fine-tune based on road surface and personal preference. Use the calculator above for precise recommendations. Chart values assume a 19 mm internal rim width; the calculator adjusts for wider or narrower rims. Many cells above are over the 72.5 PSI (5 bar) ETRTO limit for hookless rims: check your rim type before inflating to them.
Why Front and Rear Tyre Pressure Should Be Different
On a road bike, run the rear tyre 4 to 12 percent higher than the front, rising with tyre width. Roughly 60% of total weight sits on the rear wheel and 40% on the front, so equal pressure means the front is over-inflated for the load it carries. Running equal front and rear tyre pressure is a common mistake. It means the front is over-inflated (harsh, less grip) and the rear is under-inflated (more rolling resistance, risk of pinch flats). The calculator above automatically splits pressure between front and rear based on standard road bike weight distribution. For time trial bikes with a more forward position, the split is closer to 55/45. For gravel riding, which needs significantly lower pressure, see our gravel tyre pressure calculator.
Clincher vs Tubeless Pressure: What's the Difference?
Tubeless road tyres should run 5-10 PSI lower than clincher (tubed) tyres of the same width. Without an inner tube, the tyre casing conforms better to road imperfections, and there's no tube friction to create rolling resistance. Lower pressure also reduces the risk of tyre bounce on rough surfaces. However, don't go too low. On 25 to 28 mm tyres, going below 50 PSI tubeless risks burping sealant at the bead. Wider road tyres run lower: the safe minimum falls with width, down to about 29 PSI on 38 mm. The calculator above adjusts pressure automatically when you select "Tubeless" setup. Running tubeless? Calculate how much sealant you need with our tubeless sealant calculator.
Does Rim Width Change Tyre Pressure?
A wider rim means lower pressure. For a 75 kg rider on 28 mm tubeless tyres, the calculator gives 68 PSI front and 73 PSI rear on a 19 mm internal rim, but 62 PSI front and 67 PSI rear on a 25 mm rim, a drop of about 6 PSI. The rim holds the tyre bead further apart, so the same tyre sits wider and rounder and carries more air. Following ETRTO, Continental puts the relationship at 0.4 mm of extra tyre width per millimetre of extra rim width, which is why a 28 mm tyre measures over 30 mm on a modern wide rim. Measure the inside of the rim channel where the bead sits, not the outside of the rim, and set the field above to match.
How Tyre Width Affects Pressure
Wider tyres need lower pressure for optimal performance. A 28mm tyre at 75 PSI has approximately the same tyre drop (casing deformation) as a 23mm tyre at 100 PSI. Modern cycling science confirms that wider tyres at lower pressure are actually FASTER than narrow tyres at high pressure on real-world roads. The energy saved from absorbing vibrations outweighs any aerodynamic penalty. This is why professional road cycling has shifted from 23mm to 25-28mm tyres over the past decade. Mountain biking? Use our MTB tyre pressure calculator designed for wider, lower-pressure tyres.
Road Surface and Pressure Adjustments
Rough roads require lower pressure for comfort and grip. The calculator offers three surface modes: smooth road (standard pressure), rough road (reduce ~5%), and cobblestones (reduce ~10-15%). For cobbled classics like Paris-Roubaix, professionals run as low as 55-65 PSI on 28-30mm tyres. For smooth velodrome or freshly paved roads, run at the higher end of the recommended range. On an e-road bike? System weight is higher. Check our eMTB tyre pressure calculator for weight-adjusted recommendations.
How it works
Weight Distribution: 40% Front, 60% Rear
A road bike's weight is not split evenly between the wheels. Approximately 40% of the combined rider and bike weight sits over the front wheel and 60% over the rear. This is why the rear tyre runs higher than the front.
The split sets the direction, not the size
Pressure is not shared out in proportion to the load on each wheel. If it were, the rear would run about 50 percent higher than the front. In practice the gap is 4 to 12 percent, rising with tyre width, and that is what the chart on this page carries.
Two things keep the front close to the rear. It is the tyre you rely on for grip and comfort, since it steers and it hits every bump first. And it is loaded far harder than its static share suggests: under firm braking, weight transfers forward until the front wheel carries up to three times what it carries standing still. A front tyre inflated for 40 percent of the load would be badly under-inflated at exactly the moment it matters most.
Why the rear is always higher
The rear carries more weight all the time, and it takes the pedalling load and most of the pinch flat risk. A few PSI more keeps its contact patch in shape without stiffening the wheel you steer with.
What happens with wrong pressure
Too high: Reduced contact patch, harsh ride, reduced grip on imperfections.
Too low: Sluggish handling, pinch flat risk, rim damage on impacts.
Front too high vs rear: Reduced front grip in corners.
The 40/60 split varies slightly by bike geometry. Time trial bikes with an aggressive position load more weight forward.
Wider Tyres Need Less Pressure
The correct pressure is not the maximum pressure printed on the tyre sidewall. It is the pressure at which the tyre's contact patch is the right shape and size for the load, typically where the tyre deflects about 15% of its width under load.
The 15% deflection rule
A 25mm tyre at correct pressure deflects approximately 3.75mm under the rider's weight. A 38mm tyre deflects 5.7mm. This larger deflection is normal: it means the tyre is absorbing road vibration effectively.
Rolling resistance and pressure
Rolling resistance is lowest at a pressure that allows controlled tyre deformation, not at maximum pressure. Overinflated tyres bounce on road imperfections rather than conforming to them, actually increasing rolling resistance on real roads.
23 to 25mm: 85 to 110 PSI typical
28 to 30mm: 70 to 90 PSI typical
32 to 38mm: 55 to 75 PSI typical
Run About 7 PSI Lower with Tubeless
Tubeless tyres allow lower pressures, 7 PSI below clincher throughout the charts on this page, because there is no inner tube that can pinch against the rim (a "pinch flat" or "snake bite"). The elimination of pinch flat risk is the main reason tubeless setups can run significantly lower pressure than clincher setups.
Benefits of lower tubeless pressure
Better grip: Larger contact patch in corners and on rough surfaces.
More comfort: Tyre absorbs more vibration, less fatigue on long rides.
Rolling resistance: On rough roads, lower pressure reduces rolling resistance.
Self-sealing: Liquid sealant seals punctures up to 6mm instantly.
On perfectly smooth tarmac, a high-pressure clincher is still very fast. The tubeless advantage grows the rougher the road surface.
Frequently asked questions
What PSI should I run on 28mm road tyres?
For a 75 kg rider on clincher 28mm tyres, start at approximately 75 PSI front and 80 PSI rear. Tubeless 28mm: approximately 68 PSI front and 73 PSI rear. Lighter riders go lower, heavier riders go higher. See the pressure chart above for your exact weight, or use the calculator for a precise recommendation.
Should front and rear tyre pressure be the same?
No. The rear tyre carries more weight (~60% of total) and should run 5 to 15% higher pressure than the front, rising with tyre width. Running equal pressure means the front is too hard (less grip in corners) and the rear is too soft (more flats, more rolling resistance).
Does rim width change tyre pressure?
Yes. A wider rim spreads the tyre bead further apart, so the same tyre sits wider and holds more air, and it wants less pressure. For a 75 kg rider on 28 mm tubeless tyres the calculator gives 68 PSI front and 73 PSI rear on a 19 mm internal rim, and 62 PSI front and 67 PSI rear on a 25 mm rim. Following ETRTO, Continental puts the effect at 0.4 mm of tyre width per millimetre of rim width. Measure the inside of the rim channel, not the outside.
Do tubeless tyres need less pressure than clincher?
Yes. Tubeless road tyres should run 5-10 PSI lower than clincher (tubed) tyres of the same width. The supple casing without inner tube friction performs better at lower pressure and reduces rolling resistance.
What is the maximum tyre pressure for road bikes?
Most road tyres are rated for 100-130 PSI maximum (check the sidewall), but hookless rims, common on modern carbon wheels, are limited to 72.5 PSI (5 bar) per ETRTO guidelines regardless of what the tyre is rated for. Maximum pressure is rarely optimal in any case: most riders perform better at 60-80% of maximum.
How does rider weight affect tyre pressure?
Heavier riders need higher pressure to prevent excessive tyre deformation. As a rough guide, add approximately 0.7 PSI per kilogram of rider weight above 70 kg, or subtract 0.7 PSI per kilogram below 70 kg. The calculator above provides precise recommendations based on your specific weight and tyre width.
How do I calculate the correct tyre pressure for road cycling?
Optimal tyre pressure depends on total system weight (rider plus bike), tyre width, and surface. Wider tyres require lower pressure for the same load. The rear tyre always runs higher than the front because it carries approximately 60% of total weight versus 40% on the front. Use the calculator above with your exact weight and tyre width for precise front and rear recommendations.
Should front and rear tyres have the same pressure?
No. The rear tyre should always run 4 to 12 percent higher than the front, rising with tyre width, which is 5 to 7 PSI across the charts on this page, because it carries more weight. Running identical pressure front and rear is a common mistake that leads to either a harsh ride (over-inflated front) or sluggish handling (under-inflated rear). Across the charts on this page the gap is 5 to 7 PSI.
What happens if tyre pressure is too high?
Over-inflated tyres have a smaller contact patch with the road surface. On smooth tarmac this slightly reduces rolling resistance, but on any road imperfection the tyre bounces rather than deforming around the obstacle. This increases rolling resistance on real roads, reduces grip in corners, transmits more vibration to the rider causing fatigue, and increases puncture risk from sharp impacts.
What happens if tyre pressure is too low?
Under-inflated tyres have excessive rolling resistance because the tyre deforms too much. With a tube (clincher), very low pressure causes pinch flats, where the tube gets pinched between the rim and an obstacle. Handling becomes vague and the tyre may roll off the rim in tight corners. For tubeless tyres, low pressure causes burping: sealant loss through the bead under cornering load.
How does tyre width affect the correct pressure?
Wider tyres run at lower pressure than narrow tyres for the same rider weight. A 25mm tyre at 90 PSI has approximately the same contact patch size as a 32mm tyre at 65 PSI. Contact patch size, not tyre width, determines rolling resistance and grip. Modern research shows that at correct pressure, wider tyres have lower rolling resistance than narrow tyres on real road surfaces.
Do tubeless tyres run at different pressure than clinchers?
Yes. The charts on this page put tubeless exactly 7 PSI below clincher at every rider weight and tyre width, because there is no inner tube to pinch flat. Lower pressure improves comfort, traction, and real-world rolling resistance. The minimum practical pressure for tubeless depends on rim internal width and rider weight. Going too low causes burping under hard cornering. For a 75 kg rider on 28mm tyres that is 68 PSI front and 73 PSI rear tubeless, against 75 and 80 clincher.
How often should I check tyre pressure?
Check tyre pressure before every ride. Road tyres lose approximately 5 to 15 PSI per week through natural permeation. A tyre that was at 90 PSI on Friday may be at 75 to 80 PSI the following weekend. Under-inflated tyres increase rolling resistance, reduce handling precision, and increase puncture risk. A good floor pump with a gauge takes less than 60 seconds per tyre.
Does air temperature affect tyre pressure?
Yes. Tyre pressure decreases approximately 1 PSI for every 5°C drop in temperature. If you inflate your tyres in a warm garage at 20°C and then ride in 5°C conditions, you lose approximately 3 PSI. In summer when tarmac heats the air inside the tyre, pressure can increase by 5 to 10 PSI above what you set in the morning. Check pressure in conditions similar to your riding conditions.