Find optimal tyre by surface conditions_[quick link fft.tips/surface]

	A	B	C	D	E	G	H	AE
1	Alternative location:		https://www.cyclingapps.net/calculators/surface-calculator/
2								VALIDATION
3		FFT: Find Optimal Tyre Size for any Surface						rim
4				(aka Riding Surface <> Tyre Matcher)				15
5								15.5
6			>> helps you work out the best tyre for each riding surface by rolling resistance (as well as weight / rim size) <<					16
7			be careful not to exceed tyre recommendations					16.5
8								17
9			Your weight (with bike & equipment)	90	kg			17.5
10								18
11			Do you have preferred Tyre Width?	40	mm			18.5
12								19
13			Internal Rim Bead Width/Size (default is 22c)	24	mm (c)			19.5
14				20				20
15			External Rim Width (leave BLANK if Unknown)	28	mm (c)			20.5
16			if you don't know your wheel width then our guess is >>	28.2	mm			21
17			closest tyre that will "blow up" to match this rim is about >>	21.3	mm			21.5
18			perhaps corresponding to the following	Vittoria EVO Open Corsa Triathlon 22C	<< experimental			22
20								23
21								23.5
22			Enter Surface Conditions (% or ratio or distance)	Distance on 0 to 100 scale	Severity			24
23								24.5
24								25
25			Amount of Gravel/Off Road.....	50	moderate			25.5
26				50% CRR= 0.0169				26
27								26.5
28			Amount of Cobbles.....	7	moderate			27
29				7% CRR= 0.0169				27.5
30								28
31			rough tarmac.....	43				28.5
32				43% CRR= 0.008				29
33								29.5
34			Default: typical tarmac.....	0				30
35				0% CRR= 0.0069				30.5
36								31
37			Super smooth tarmac.....	0				31.5
38				0% CRR= 0.006				32
39								32.5
40			Your overall surface is described as…………..	Challenging				33
41				ave CRR = 0.01808				33.5
42								34
43								34.5
44			For this surface, your rim & your weight recommend tyre is	29.8	mm			35
45			At this size (29.8mm) ...then pressure should be about	71.1	psi	alternative calc:	https://fft.tips/pressure	35.5
46			At this size & pressure ...then contact patch will be about	389.6	mm2			36
47			At this pressure, we estimate your tyre will actually measure...	30.9	mm			36.5
48								37
49		vs your choice...						37.5
50			but you self-selected a tyre size of 40mm	40	mm			38
51			At this size (40mm) ...then pressure should be about	59.1	psi			38.5
52			At this size & pressure ...then contact patch will be about	549.8	mm2			39
53			At this pressure, we estimate your tyre will actually measure...	43.3	mm			39.5
54								40
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68			Related Sheets
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70			https://fft.tips/pressure2
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