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

	B	C	D	E	G	H	I	J	K	L	M	N
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)	81	81	kg	OK		82
11				178.6	lbs
13		Approx Front Tyre Load (without braking) >		36.5 kg
14
15		Approx Rear Tyre Load (without braking) >		44.6 kg
16								Quick INCH to MM Converter
17		Enter Tyre Width (mm)		30		OK		2.25	Inch
18				1.18 inch				is
19								57.15	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)		0.007		(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		31.5	kph	(needed to calc watts)
27		which is........		19.5	mph
28
30
31		Weather conditions		Dry		Not applying a correction		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 = >	Dry	Dry	Dry	Dry
37				Front Pressure		Bar	4.5	4.0	3.2	2.9	Careful with low front pressure under hard braking/cornering
38
39				Rear Pressure		Bar	5.4	4.7	3.8	3.5
40
41				Combined AVE Pressure		Bar	5.0	4.4	3.5	3.2
42
43				Rolling Watts Loss (for pair)		CRR watts	43.5	55.6	62.6	76.5
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?	110.5899631
49						weather = >	Dry	Dry	Dry
50				Front Pressure		Bar	Not applicable	1.8	2.1	Careful with low front pressure under hard braking/cornering		0
51
52				Rear Pressure		Bar	Not applicable	2.1	2.5
53
54				Combined AVE Pressure		Bar	Not applicable	2.0	2.3
55
56				Rolling Watts Loss (for pair)		CRR watts	59.1	86.9	66.1
57
58							**non-clincher if low PSI
59		RESULTS: TRACK / VELODROME
60
61				conditions =>			Wood Velodrome	Concrete Velodrome	Warnings?
62						weather = >	indoors	Dry
63				Front Pressure		Bar	5.4	4.9	Careful with low front pressure under hard braking/cornering
64
65				Rear Pressure		Bar	6.4	5.8
66
67				Combined AVE Pressure		Bar	5.9	5.3
68
69				Rolling Watts Loss (for pair)		CRR watts	38.9	42.4
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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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