| A | B | C | D | E | F | G | H | I | J | K | L | M | N | |
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1 | https://cyclingapps.net | FastFitness New Shop is Open 🏬 | https://www.cyclingapps.net/shop/shop-front/ | |||||||||||
2 | https://cyclingapps.net | http://www.patreon.com/fastfitnesstips | https://youtu.be/Clk_LLBYFzA | |||||||||||
3 | https://cyclingapps.net | FFT Optimal Tyre Pressure Calculator v4 |  | https://youtu.be/Clk_LLBYFzA | ||||||||||
4 | 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 | ||||||||||
5 | >> remember too high slows you down on rough ground & descents, too low slows you down on good tarmac << | |||||||||||||
6 | DATA ENTRY | |||||||||||||
7 | Sheet takes about 10s to run a formula | |||||||||||||
8 | Do you prefer PSI or Bar? | psi | ...You prefer PSI | |||||||||||
9 | ||||||||||||||
10 | Enter Weight (rider+bike) (kg) | 124 | 124 | kg | OK | 82 | ||||||||
11 | 273.4 | lbs | ||||||||||||
13 | Approx Front Tyre Load (without braking) > | 55.8 kg | ||||||||||||
14 | ||||||||||||||
15 | Approx Rear Tyre Load (without braking) > | 68.2 kg | ||||||||||||
16 | Quick INCH to MM Converter | |||||||||||||
17 | Enter Tyre Width (mm) | 32 | OK | 1 | Inch | |||||||||
18 | 1.26 inch | is | ||||||||||||
19 | 25.4 | mm | ||||||||||||
20 | Change Balance (front/rear ratio) | 45 | For fast descents use 50:50 | |||||||||||
21 | 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 | |||||||||||||
22 | ||||||||||||||
23 | Tyre CRR (if Known) | 0.009 | (needed to calc watts) | |||||||||||
24 | 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 | |||||||||||||
25 | ||||||||||||||
26 | Enter your typical ave speed | 25 | kph | (needed to calc watts) | ||||||||||
27 | which is........ | 15.5 | mph | |||||||||||
28 | ||||||||||||||
30 | ||||||||||||||
31 | Weather conditions | 1 | Applying weather correction of | 1 | ||||||||||
32 | weather correction (don't edit) | |||||||||||||
33 | RESULTS: ROAD / GRAVEL BIKES | |||||||||||||
34 | ||||||||||||||
35 | conditions => | vSmooth Tarmac | Typical Tarmac | Hard Pack Gravel | Cobbled Road | Warnings? | ||||||||
36 | weather = > | 1 | 1 | 1 | 1 | |||||||||
37 | Front Pressure | PSI | 86.5 | 75.9 | 60.7 | 55.4 | ||||||||
38 | ||||||||||||||
39 | Rear Pressure | PSI | 103.8 | 91.1 | 72.9 | 66.5 | ||||||||
40 | ||||||||||||||
41 | Combined AVE Pressure | PSI | 95.2 | 83.5 | 66.8 | 60.9 | ||||||||
42 | ||||||||||||||
43 | Rolling Watts Loss (for pair) | CRR watts | 69.7 | 84.5 | 92.9 | 109.8 | ||||||||
44 | ||||||||||||||
45 | ||||||||||||||
46 | RESULTS: MTB / CYCLOCROSS | |||||||||||||
47 | Sheet takes about 10s to run a formula | |||||||||||||
48 | conditions => | MTB/CX on road* | Soft/Mud/Grass** | Hard Off-Road** | Warnings? | Warnings? | 100.8931476 | |||||||
49 | weather = > | 1 | 1 | 1 | ||||||||||
50 | Front Pressure | PSI | Not applicable | 34.1 | 41.7 | 0 | ||||||||
51 | ||||||||||||||
52 | Rear Pressure | PSI | Not applicable | 41.0 | 50.1 | |||||||||
53 | ||||||||||||||
54 | Combined AVE Pressure | PSI | Not applicable | 37.6 | 45.9 | |||||||||
55 | ||||||||||||||
56 | Rolling Watts Loss (for pair) | CRR watts | 88.7 | 122.5 | 97.1 | |||||||||
57 | ||||||||||||||
58 | **non-clincher if low PSI | |||||||||||||
59 | RESULTS: TRACK / VELODROME | |||||||||||||
60 | ||||||||||||||
61 | conditions => | Wood Velodrome | Concrete Velodrome | Warnings? | ||||||||||
62 | weather = > | indoors | 1 | |||||||||||
63 | Front Pressure | PSI | 102.4 | 93.2 | ||||||||||
64 | ||||||||||||||
65 | Rear Pressure | PSI | 122.9 | 111.9 | ||||||||||
66 | ||||||||||||||
67 | Combined AVE Pressure | PSI | 112.7 | 102.5 | ||||||||||
68 | ||||||||||||||
69 | Rolling Watts Loss (for pair) | CRR watts | 64.2 | 70.0 | ||||||||||
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72 | DO YOU WANT TO SELECT TYRE BY SURFACE CONDITIONS? | |||||||||||||
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75 | https://fft.tips/surface | |||||||||||||
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81 | We invite you to Join: | |||||||||||||
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85 | https://www.patreon.com/fastfitnesstips | |||||||||||||
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89 | FFT Science based Coaching | |||||||||||||
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91 | https://fastfitness.tips | |||||||||||||
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93 | https://www.facebook.com/groups/fastfitnesscoaching/ | |||||||||||||
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