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https://cyclingapps.net
http://www.patreon.com/fastfitnesstips
https://youtu.be/Clk_LLBYFzA
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https://cyclingapps.net
FFT Optimal Tyre Pressure Calculator v4
https://youtu.be/Clk_LLBYFzA
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https://cyclingapps.net
>> 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)
7272kgOK82
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158.8lbs
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Approx Front Tyre Load (without braking) >
34.6 kg
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Approx Rear Tyre Load (without braking) >
37.4 kg
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Quick INCH to MM Converter
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Enter Tyre Width (mm)
25OK1Inch
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0.98 inchis
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25.4mm
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Change Balance (front/rear ratio)
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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 conditionsdry
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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conditions =>
vSmooth Tarmac
Typical TarmacHard Pack GravelCobbled RoadWarnings?
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weather = >
drydrydrydry
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Front Pressure
PSI78.568.955.150.3
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Rear Pressure
PSI94.182.566.060.2
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Combined AVE Pressure
PSI86.375.760.655.3
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Rolling Watts Loss (for pair)
CRR watts
25.035.341.253.0
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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?143.3189201
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weather = >
drydrydry
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Front Pressure
PSINot applicable31.037.90
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Rear Pressure
PSINot applicable37.145.4
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Combined AVE Pressure
PSINot applicable34.141.6
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Rolling Watts Loss (for pair)
CRR watts
38.361.844.1
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**non-clincher if low PSI
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RESULTS: TRACK / VELODROME
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conditions =>
Wood Velodrome
Concrete VelodromeWarnings?
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weather = >
indoorsdry
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Front Pressure
PSI93.084.6
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Rear Pressure
PSI111.4101.4
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Combined AVE Pressure
PSI102.293.0
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Rolling Watts Loss (for pair)
CRR watts
21.223.1
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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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