Find optimal tyre by surface conditions_[quick link fft.tips/surface]
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Alternative location:
https://www.cyclingapps.net/calculators/surface-calculator/
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VALIDATION
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FFT: Find Optimal Tyre Size for any Surface
rim
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(aka Riding Surface <> Tyre Matcher)
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15.5
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>> helps you work out the best tyre for each riding surface by rolling resistance (as well as weight / rim size) <<
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be careful not to exceed tyre recommendations16.5
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Your weight (with bike & equipment) 90kg17.5
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18
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Do you have preferred Tyre Width? 40mm18.5
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19
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Internal Rim Bead Width/Size (default is 22c)
24mm (c)19.5
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2020
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External Rim Width (leave BLANK if Unknown)
28mm (c)20.5
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if you don't know your wheel width then our guess is >>
28.2mm21
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closest tyre that will "blow up" to match this rim is about >>
21.3mm21.5
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perhaps corresponding to the following
Vittoria EVO Open Corsa Triathlon 22C
<< experimental
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23.5
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Enter Surface Conditions (% or ratio or distance)
Distance on 0 to 100 scale
Severity24
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24.5
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Amount of Gravel/Off Road..... 50moderate25.5
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50% CRR= 0.0169
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26.5
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Amount of Cobbles..... 7moderate27
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7% CRR= 0.0169
27.5
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28
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rough tarmac..... 4328.5
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43% CRR= 0.008
29
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29.5
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Default: typical tarmac..... 030
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0% CRR= 0.0069
30.5
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31
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Super smooth tarmac..... 031.5
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0% CRR= 0.006
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32.5
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Your overall surface is described as…………..Challenging33
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ave CRR = 0.0180833.5
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34
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34.5
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For this surface, your rim & your weight recommend tyre is
29.8mm35
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At this size (29.8mm) ...then pressure should be about
71.1psi
alternative calc:
https://fft.tips/pressure
35.5
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At this size & pressure ...then contact patch will be about
389.6mm236
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At this pressure, we estimate your tyre will actually measure...
30.9mm36.5
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37
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vs your choice...
37.5
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but you self-selected a tyre size of 40mm40mm38
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At this size (40mm) ...then pressure should be about
59.1psi38.5
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At this size & pressure ...then contact patch will be about
549.8mm239
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At this pressure, we estimate your tyre will actually measure...
43.3mm39.5
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40
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We invite you to Join:
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https://www.strava.com/clubs/fastfitnesstips
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Share this sheet:
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https://fft.tips/surface
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Related Sheets
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https://fft.tips/pressure2
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https://fft.tips/tyre2
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