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Alternative location:
https://www.cyclingapps.net/pressure-calculator/
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FastFitness.Tips Optimal Tyre Pressure Calculator v4
http://www.patreon.com/fastfitnesstips
https://youtu.be/Clk_LLBYFzA
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>> helps you work out the likely best tyre pressure personalised to you <<
http://www.patreon.com/fastfitnesstips
https://youtu.be/Clk_LLBYFzA
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>> remember too high slows you down on rough ground & descents, too low slows you down on good tarmac <<
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DATA ENTRY
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Sheet takes about 10s to run a formula
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Do you prefer PSI or Bar?
PSI
...You prefer PSI
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Enter Weight (rider+bike) (kg)
7777kgOK83
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169.8lbs
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Approx Front Tyre Load (without braking) >
36.6 kg
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Approx Rear Tyre Load (without braking) >
40.4 kg
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Quick INCH to MM Converter
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Enter Tyre Width (mm)
28.0 mmOK2.25Inch
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1.1 inchis
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57.15mm
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Change Balance (front/rear ratio)
47.5
For fast descents use 50:50
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Following testing we recommend 47.5 for Road on TTbars | 50 for TT/Tri | 49 for Track | Road =45 | MTB/CX = 40 | Recumbent = 35 | Touring with panniers = 30 | tandem (2 similar riders) = 46 | but whilst braking = 50:50
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Tyre CRR (if Known)
0.005
(needed to calc watts)
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Typical: 0.001 for Wood Track | 0.002 for Concrete Track | 0.0035 for Smooth road | 0.005 Typical tarmac | 0.007 for Rough Road | 0.006 for Cx | 0.009 for MTB
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Enter your typical ave speed
30kph
(needed to calc watts)
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which is........18.6mph
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Weather conditions
Dry
Not applying a correction
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weather correction (don't edit)
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RESULTS: ROAD / GRAVEL BIKES
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Sheet takes about 10s to run a formula
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conditions =>
vSmooth Tarmac
Typical Tarmac
Hard Pack Gravel
Cobbled RoadWarnings?
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weather = >
DryDryDryDry
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Front Pressure
PSI73.264.251.446.9
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Rear Pressure
PSI80.070.256.251.2
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Combined AVE Pressure
PSI76.667.253.849.1
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Rolling Watts Loss (for pair)
CRR watts
26.837.844.156.7
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RESULTS: MTB / CYCLOCROSS
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Sheet takes about 10s to run a formula
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conditions =>
MTB/CX on road*
Soft/Mud/Grass**
Hard Off-Road**
Warnings?Warnings?121.9889296
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weather = >
DryDryDry
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Front Pressure
PSINot applicable28.935.3
Careful with low front pressure under hard braking/cornering
0
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Rear Pressure
PSINot applicable31.638.6
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Combined AVE Pressure
PSINot applicable30.237.0
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Rolling Watts Loss (for pair)
CRR watts
40.966.147.2
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**non-clincher if low PSI
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RESULTS: TRACK / VELODROME
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Sheet takes about 10s to run a formula
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conditions =>
Wood Velodrome
Concrete VelodromeWarnings?
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weather = >
indoorsDry
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Front Pressure
PSI86.778.9
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Rear Pressure
PSI94.886.2
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Combined AVE Pressure
PSI90.782.6
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Rolling Watts Loss (for pair)
CRR watts
22.724.7
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DO YOU WANT TO SELECT TYRE BY SURFACE CONDITIONS?
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https://fft.tips/surface
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App Version
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