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https://cyclingapps.net
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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)
82.082.0kgOK88
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180.8lbs
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Approx Front Tyre Load (without braking) >
36.9 kg
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Approx Rear Tyre Load (without braking) >
45.1 kg
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Quick INCH to MM Converter
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Enter Tyre Width (mm)
28OK1.2Inch
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1.1 inchis
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30.48mm
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Change Balance (front/rear ratio)
45
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)0.004
(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
28kph
(needed to calc watts)
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which is........17.4mph
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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
PSI73.864.751.847.2
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Rear Pressure
PSI88.377.462.056.5
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Combined AVE Pressure
PSI81.071.156.951.9
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Rolling Watts Loss (for pair)
CRR watts
20.331.337.550.1
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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 applicable29.135.6
Careful with low front pressure under hard braking/cornering
0
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Rear Pressure
PSINot applicable34.942.6
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Combined AVE Pressure
PSINot applicable32.039.1
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Rolling Watts Loss (for pair)
CRR watts
34.459.440.7
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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
PSI87.479.5
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Rear Pressure
PSI104.695.1
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Combined AVE Pressure
PSI96.087.3
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Rolling Watts Loss (for pair)
CRR watts
16.317.7
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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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FFT Science based Coaching
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https://fastfitness.tips
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https://www.facebook.com/groups/fastfitnesscoaching/
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