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New FastFitness Shop is Now Open 🏬
https://www.cyclingapps.net/shop/shop-front/
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VALIDATION
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Find Optimal Tyre Size for any Surface
rim
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New! 50% off training plan (code="TIZ") based on your inputs: https://www.cyclingapps.net/coaching/order-personalized-adaptive-training-plan/
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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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Your weight (with bike & equipment) 240Lbs17.5
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109.1 kg18
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Do you have preferred Tyre Width? 25mm18.5
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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) mm (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 >>20.9mm21.5
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perhaps corresponding to the followingContinental GP4000SII 23C
<< experimental
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23
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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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25
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Amount of Gravel/Off Road..... 0moderate25.5
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0% CRR= 0.019926
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26.5
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Amount of Cobbles..... 0moderate27
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0% CRR= 0.019927.5
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28
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Rough tarmac..... 028.5
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0% CRR= 0.008529
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29.5
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Normal / typical tarmac..... 10030
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98% CRR= 0.004630.5
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31
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Super smooth tarmac..... 231.5
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2% CRR= 0.004232
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32.5
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Your overall surface is described as…………..All Tamac33
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ave CRR = 0.0045733.5
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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
25.8mm
alternative calc:
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At this size (25.8mm) ...then pressure should be about131.7psi
https://fft.tips/pressure
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At this size & pressure ...then contact patch will be about326.7mm236
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At this pressure, we estimate your tyre will actually measure...
28.2mm36.5
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37
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vs your choice...
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but you self-selected a tyre size of 25mm25mm38
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At this size (25mm) ...then pressure should be about134.3psi38.5
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At this size & pressure ...then contact patch will be about314.2mm239
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At this pressure, we estimate your tyre will actually measure...
26.8mm39.5
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Share this sheet:
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https://fft.tips/surface
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