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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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ps. be careful not to exceed tyre recommendations16.5
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17
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Your weight (with bike & equipment) 188lbs17.5
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85.5 kg18
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Do you have preferred Tyre Width? 32mm18.5
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19
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Internal Rim Bead Width/Size (default is 22c)
19mm (c)19.5
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2020
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External Rim Width (leave BLANK if Unknown)
27.5mm (c)20.5
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if you don't know your wheel width then our guess is >>
24.2mm21
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closest tyre that will "blow up" to match this rim is about >>
26.1mm21.5
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perhaps corresponding to the following
Continental Grand Prix 5000 (25) 2018 (normal inflation) latex
<< 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
24
25
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Amount of Gravel/Off Road..... 0mild25.5
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0% CRR= 0.0181
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26.5
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Amount of Cobbles..... 0mild27
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0% CRR= 0.0181
27.5
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28
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rough tarmac..... 4028.5
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40% CRR= 0.0064
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29.5
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Default: typical tarmac..... 6030
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60% CRR= 0.0056
30.5
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31
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Super smooth tarmac..... 031.5
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0% CRR= 0.005
32
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32.5
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Your overall surface is described as…………..
All Tamac33
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ave CRR = 0.0059233.5
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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
26.9mm
alternative calc:
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At this size (26.9mm) ...then pressure should be about
88.4psi
https://fft.tips/pressure
35.5
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At this size & pressure ...then contact patch will be about
344mm236
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At this pressure, we estimate your tyre will actually measure...
28mm36.5
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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 32mm32mm38
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At this size (32mm) ...then pressure should be about
79.2psi38.5
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At this size & pressure ...then contact patch will be about
424.1mm239
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At this pressure, we estimate your tyre will actually measure...
34.5mm39.5
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40
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We invite you to Join:
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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/tyre2
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