| 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? | bar | ...You prefer Bar | |||||||||||
9 | ||||||||||||||
10 | Enter Weight (rider+bike) (kg) | 88 | 88 | kg | OK | 82 | ||||||||
11 | 194 | lbs | ||||||||||||
13 | Approx Front Tyre Load (without braking) > | 39.6 kg | ||||||||||||
14 | ||||||||||||||
15 | Approx Rear Tyre Load (without braking) > | 48.4 kg | ||||||||||||
16 | Quick INCH to MM Converter | |||||||||||||
17 | Enter Tyre Width (mm) | 28 | OK | 2.4 | Inch | |||||||||
18 | 1.1 inch | is | ||||||||||||
19 | 60.96 | 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) | 0.005 | (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 | 32 | kph | (needed to calc watts) | ||||||||||
27 | which is........ | 19.8 | 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 | Bar | 5.4 | 4.8 | 3.8 | 3.5 | Careful with low front pressure under hard braking/cornering | |||||||
38 | ||||||||||||||
39 | Rear Pressure | Bar | 6.5 | 5.7 | 4.6 | 4.2 | ||||||||
40 | ||||||||||||||
41 | Combined AVE Pressure | Bar | 6.0 | 5.2 | 4.2 | 3.8 | ||||||||
42 | ||||||||||||||
43 | Rolling Watts Loss (for pair) | CRR watts | 32.6 | 46.0 | 53.7 | 69.1 | ||||||||
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? | 121.9889296 | |||||||
49 | weather = > | 1 | 1 | 1 | ||||||||||
50 | Front Pressure | Bar | Not applicable | 2.1 | 2.5 | Careful with low front pressure under hard braking/cornering | 0 | |||||||
51 | ||||||||||||||
52 | Rear Pressure | Bar | Not applicable | 2.6 | 3.0 | |||||||||
53 | ||||||||||||||
54 | Combined AVE Pressure | Bar | Not applicable | 2.3 | 2.8 | |||||||||
55 | ||||||||||||||
56 | Rolling Watts Loss (for pair) | CRR watts | 49.9 | 80.6 | 57.6 | |||||||||
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 | Bar | 6.4 | 5.8 | Careful with low front pressure under hard braking/cornering | |||||||||
64 | ||||||||||||||
65 | Rear Pressure | Bar | 7.7 | 7.0 | ||||||||||
66 | ||||||||||||||
67 | Combined AVE Pressure | Bar | 7.0 | 6.4 | ||||||||||
68 | ||||||||||||||
69 | Rolling Watts Loss (for pair) | CRR watts | 27.6 | 30.1 | ||||||||||
70 | ||||||||||||||
71 | ||||||||||||||
72 | DO YOU WANT TO SELECT TYRE BY SURFACE CONDITIONS? | |||||||||||||
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74 | ||||||||||||||
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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