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1 | New FastFitness Shop is Now Open 🏬 | https://www.cyclingapps.net/shop/shop-front/ | ||||||||||
2 | VALIDATION | |||||||||||
3 | Find Optimal Tyre Size for any Surface | rim | ||||||||||
4 | 15 | |||||||||||
5 | >> helps you work out the best tyre for each riding surface by rolling resistance (as well as weight / rim size) << | 15.5 | ||||||||||
6 | 16 | |||||||||||
7 | 16.5 | |||||||||||
8 | 17 | |||||||||||
9 | Your weight (with bike & equipment) | 93 | kg | 17.5 | ||||||||
10 | 18 | |||||||||||
11 | Do you have preferred Tyre Width? | 28 | mm | 18.5 | ||||||||
12 | 19 | |||||||||||
13 | Internal Rim Bead Width/Size (default is 22c) | 21 | mm (c) | 19.5 | ||||||||
14 | 20 | 20 | ||||||||||
15 | External Rim Width (leave BLANK if Unknown) | 28 | mm (c) | 20.5 | ||||||||
16 | if you don't know your wheel width then our guess is >> | 25.9 | mm | 21 | ||||||||
17 | closest tyre that will "blow up" to match this rim is about >> | 25.2 | mm | 21.5 | ||||||||
18 | perhaps corresponding to the following | Continental GP Force 24C | << experimental | 22 | ||||||||
20 | 23 | |||||||||||
21 | 23.5 | |||||||||||
22 | Enter Surface Conditions (% or ratio or distance) | Distance on 0 to 100 scale | Severity | 24 | ||||||||
23 | 24.5 | |||||||||||
24 | 25 | |||||||||||
25 | Amount of Gravel/Off Road..... | mild | 25.5 | |||||||||
26 | 0% CRR= 0.0181 | 26 | ||||||||||
27 | 26.5 | |||||||||||
28 | Amount of Cobbles..... | severe | 27 | |||||||||
29 | 0% CRR= 0.0181 | 27.5 | ||||||||||
30 | 28 | |||||||||||
31 | Rough tarmac..... | 40 | 28.5 | |||||||||
32 | 40% CRR= 0.0064 | 29 | ||||||||||
33 | 29.5 | |||||||||||
34 | Normal / typical tarmac..... | 60 | 30 | |||||||||
35 | 60% CRR= 0.0056 | 30.5 | ||||||||||
36 | 31 | |||||||||||
37 | Super smooth tarmac..... | 31.5 | ||||||||||
38 | 0% CRR= 0.005 | 32 | ||||||||||
39 | 32.5 | |||||||||||
40 | Your overall surface is described as………….. | All Tamac | 33 | |||||||||
41 | ave CRR = 0.00592 | 33.5 | ||||||||||
42 | 34 | |||||||||||
43 | 34.5 | |||||||||||
44 | For this surface, your rim & your weight recommend tyre is | 27.2 | mm | 35 | ||||||||
45 | At this size (27.2mm) ...then pressure should be about | 93.7 | psi | 35.5 | ||||||||
46 | At this size & pressure ...then contact patch will be about | 348.7 | mm2 | 36 | ||||||||
47 | At this pressure, we estimate your tyre will actually measure... | 29.2 | mm | 36.5 | ||||||||
48 | 37 | |||||||||||
49 | vs your choice... | 37.5 | ||||||||||
50 | but you self-selected a tyre size of 28mm | 28 | mm | 38 | ||||||||
51 | At this size (28mm) ...then pressure should be about | 91.9 | psi | 38.5 | ||||||||
52 | At this size & pressure ...then contact patch will be about | 361.3 | mm2 | 39 | ||||||||
53 | At this pressure, we estimate your tyre will actually measure... | 30.1 | mm | 39.5 | ||||||||
54 | 40 | |||||||||||
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56 | alternative calc: | |||||||||||
57 | https://fft.tips/pressure | |||||||||||
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64 | Share this sheet: | |||||||||||
65 | ||||||||||||
66 | https://fft.tips/surface | |||||||||||
67 | ||||||||||||
68 | Related Sheets | |||||||||||
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70 | https://fft.tips/pressure2 | |||||||||||
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72 | https://fft.tips/tyre2 | |||||||||||
73 |