FastFitness Labs: Optimal Tyre Pressure [fft.tips/pressure]

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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)	83	83	kg	OK		82
11				183	lbs
13		Approx Front Tyre Load (without braking) >		41.5 kg
14
15		Approx Rear Tyre Load (without braking) >		41.5 kg
16								Quick INCH to MM Converter
17		Enter Tyre Width (mm)		28		OK		1	Inch
18				1.1 inch				is
19								25.4	mm
20		Change Balance (front/rear ratio)		50		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		35	kph	(needed to calc watts)
27		which is........		21.7	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	74.6	65.4	52.3	47.8
38
39				Rear Pressure		PSI	89.3	78.3	62.6	57.2
40
41				Combined AVE Pressure		PSI	81.9	71.9	57.5	52.5
42
43				Rolling Watts Loss (for pair)		CRR watts	33.6	47.5	55.4	71.2
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?	121.9889296
49						weather = >	1	1	1
50				Front Pressure		PSI	Not applicable	29.4	36.0	Careful with low front pressure under hard braking/cornering		0
51
52				Rear Pressure		PSI	Not applicable	35.2	43.1
53
54				Combined AVE Pressure		PSI	Not applicable	32.3	39.5
55
56				Rolling Watts Loss (for pair)		CRR watts	51.5	83.1	59.4
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	88.3	80.4
64
65				Rear Pressure		PSI	105.7	96.2
66
67				Combined AVE Pressure		PSI	97.0	88.3
68
69				Rolling Watts Loss (for pair)		CRR watts	28.5	31.1
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71
72		DO YOU WANT TO SELECT TYRE BY SURFACE CONDITIONS?
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75		https://fft.tips/surface
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