ABCDEFGHIJKLMN
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)
72.572.5kgOK82
11
159.9lbs
13
Approx Front Tyre Load (without braking) >
32.6 kg
14
15
Approx Rear Tyre Load (without braking) >
39.9 kg
16
Quick INCH to MM Converter
17
Enter Tyre Width (mm)
26OK2.4Inch
18
1.02 inchis
19
60.96mm
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)0.006
(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
31kph
(needed to calc watts)
27
which is........19.2mph
28
30
31
Weather conditions2
Applying weather correction of
1
32
weather correction (don't edit)
33
RESULTS: ROAD / GRAVEL BIKES
34
35
conditions =>
vSmooth Tarmac
Typical TarmacHard Pack GravelCobbled RoadWarnings?
36
weather = >
2222
37
Front Pressure
PSI74.365.252.147.6
38
39
Rear Pressure
PSI88.978.062.456.9
40
41
Combined AVE Pressure
PSI81.671.657.352.3
42
43
Rolling Watts Loss (for pair)
CRR watts
32.242.949.061.2
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?135.5450999
49
weather = >
222
50
Front Pressure
PSINot applicable29.335.8
Careful with low front pressure under hard braking/cornering
0
51
52
Rear Pressure
PSINot applicable35.142.9
53
54
Combined AVE Pressure
PSINot applicable32.239.4
55
56
Rolling Watts Loss (for pair)
CRR watts
45.970.452.1
57
58
**non-clincher if low PSI
59
RESULTS: TRACK / VELODROME
60
61
conditions =>
Wood Velodrome
Concrete VelodromeWarnings?
62
weather = >
indoors2
63
Front Pressure
PSI88.080.1
64
65
Rear Pressure
PSI105.395.8
66
67
Combined AVE Pressure
PSI96.687.9
68
69
Rolling Watts Loss (for pair)
CRR watts
28.230.7
70
71
72
DO YOU WANT TO SELECT TYRE BY SURFACE CONDITIONS?
73
74
75
https://fft.tips/surface
76
77
78
79
80
81
We invite you to Join:
82
83
https://www.strava.com/clubs/fastfitnesstips
84
85
https://www.patreon.com/fastfitnesstips
86
87
88
89
FFT Science based Coaching
90
91
https://fastfitness.tips
92
93
https://www.facebook.com/groups/fastfitnesscoaching/
94
95
96
97
98
99