FFT helps you find optimal tyre by surface conditions 🏞 [quick link fft.tips/surface]

	B	C	D	E	G	H	K
1		New FastFitness Shop is Now Open 🏬	https://www.cyclingapps.net/shop/shop-front/
2							VALIDATION
3	Find Optimal Tyre Size for any Surface						rim
4							15
5		>> helps you work out the best tyre for each riding surface by rolling resistance (as well as weight / rim size) <<					15.5
6							16
7							16.5
8							17
9		Your weight (with bike & equipment)	172	Lbs			17.5
10			78.2 kg				18
11		Do you have preferred Tyre Width?	25	mm			18.5
12							19
13		Internal Rim Bead Width/Size (default is 22c)	20	mm (c)			19.5
14			20				20
15		External Rim Width (leave BLANK if Unknown)		mm (c)			20.5
16		if you don't know your wheel width then our guess is >>	25.1	mm			21
17		closest tyre that will "blow up" to match this rim is about >>	21.1	mm			21.5
18		perhaps corresponding to the following	Continental Force	<< 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.....	60	moderate			25.5
26			60% CRR= 0.0166				26
27							26.5
28		Amount of Cobbles.....	1	severe			27
29			1% CRR= 0.0166				27.5
30							28
31		Rough tarmac.....	20				28.5
32			20% CRR= 0.0085				29
33							29.5
34		Normal / typical tarmac.....	19				30
35			19% CRR= 0.0073				30.5
36							31
37		Super smooth tarmac.....	0				31.5
38			0% CRR= 0.0063				32
39							32.5
40		Your overall surface is described as…………..	Challenging				33
41			ave CRR = 0.02101				33.5
42							34
43							34.5
44		For this surface, your rim & your weight recommend tyre is	30	mm			35
45		At this size (30mm) ...then pressure should be about	61.3	psi			35.5
46		At this size & pressure ...then contact patch will be about	392.7	mm2			36
47		At this pressure, we estimate your tyre will actually measure...	29.9	mm			36.5
48							37
49	vs your choice...						37.5
50		but you self-selected a tyre size of 25mm	25	mm			38
51		At this size (25mm) ...then pressure should be about	68.8	psi			38.5
52		At this size & pressure ...then contact patch will be about	314.2	mm2			39
53		At this pressure, we estimate your tyre will actually measure...	26.8	mm			39.5
54							40
55
56						alternative calc:
57					https://fft.tips/pressure
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64		Share this sheet:
65
66		https://fft.tips/surface
67
68		Related Sheets
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70		https://fft.tips/pressure2
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72		https://fft.tips/tyre2
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