Crr Overall Spreadsheet 7_14_14


1	Test Setup Constants
2	Rollout, or Wheel Circum. (m) =	2.09
3	Drum Diameter (in.) =	4.5	0.1143	m
4	Drum Separation Distance (in.) =	11	0.2794	m
5	Drivetrain Loss % =	5
6	Smooth to Rough Factor =	1.5
7	Temp. Comp. Factor (%/C) =	1.36
8	Normalization Temp. (deg C) =	20
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11	Analysis Constants
12	Total Bike+Rider Mass (kg) =	85
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14	Wheel Diameter (m) =	0.6653
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16	Blue text denote calculated values


1		Test	Tub. or	Measured	Rear Vert.	Meff	Amb. Temp.	Rear Drum	Average	Drum	Roller	Temp.	Flat Surface	Power (2 tire)	Power (2 tire)	Power (2tire)
2	Tire Name	Date	Clinch.	Width (mm)	Load (kg)	Rear (kg)	(deg C)	Spd (km/hr)	Pwr (W)	Pwr (W)	Raw Crr	Comp. Crr	Crr @ Norm. T	@30 km/hr (W)	@40 km/hr (W)	@50 km/hr (W)	Notes
3	Vittoria EVO Open Corsa Triathlon 22C	02/08/13	C	21.5	48	51.4	13.4	45.6	58.5	55.6	0.00870	0.00792	0.0031	22	29	36	Lightly Used
4	Vittoria EVO Open Corsa Slick 23C	02/08/13	C	24	48	51.4	14.2	45.9	58.9	56.0	0.00870	0.00801	0.0031	22	29	36	Lightly Used
5	Schwalbe Ironman Tubular 22C	06/23/13	T	22.5	47.5	50.9	22.2	45.5	51.7	49.1	0.00779	0.00802	0.0031	22	29	36	New Tire
6	Schwalbe IM Tubeless 22C 335mi.	07/26/13	C	23.7	47.5	50.9	25.3	45.3	52.5	49.9	0.00794	0.00851	0.0033	23	31	39	335 miles on rear use, Zipp 101
7	IRC Roadlite Tubeless 25C	07/26/13	C	26.8	47.5	50.9	27.3	45.7	51.8	49.2	0.00777	0.00854	0.0033	23	31	39	New Tire, Zipp 101
8	Continental GP4000S 23C	04/17/13	C	24.2	47	50.3	19.3	45.9	58.0	55.1	0.00875	0.00867	0.0034	24	31	39	Average of 4 Tires, 3 new + 1 w/200 mi.
9	Continental SuperSonic 20C	02/27/12	C	20.5	48	51.4	16.8	44.8	60.0	57.0	0.00908	0.00869	0.0034	24	31	39	New Tire
10	Specialized S-Works Mondo 23C	02/29/12	C	24	48	51.4	15.0	45.8	63.3	60.1	0.00937	0.00873	0.0034	24	32	40	New Tire,Out of print
11	Challenge Triathlon 23C	08/09/13	C	24.1	47.5	50.9	21.9	45.8	57.1	54.2	0.00854	0.00876	0.0034	24	32	40	New Tire
12	Challenge Forte Tubular 22C	02/15/13	T	22	48	51.4	19.7	45.7	60.0	57.0	0.00890	0.00887	0.0035	24	32	40	On Mavic CXR80 wheel w/blades
13	Specialized S-Works Turbo 24C	10/18/13	C	25.5	48	51.4	19.5	46	60.6	57.6	0.00893	0.00887	0.0035	24	32	40	New Tire
14	Bontrager R4 Aero 22C	02/08/13	C	23	48	51.4	14.4	45.4	65.3	62.0	0.00975	0.00901	0.0035	24	33	41	Lightly Used
15	Bontrager RXL Pro Open 23C	02/28/12	C	23.5	48	51.4	16.0	45.6	64.2	61.0	0.00955	0.00903	0.0035	25	33	41	Well Used Tire, Out of print
16	Schwalbe Ironman Tubeless 22C	06/23/13	C	22.95	47.5	50.9	22.1	45	57.7	54.8	0.00879	0.00904	0.0035	25	33	41	New Tire, Zipp 101
17	Michelin ProLight 20C	02/27/12	C	n/a	48	51.4	16.2	45.4	65.0	61.8	0.00971	0.00921	0.0036	25	33	42	Well Used Tire, Out of print
18	Specialized S-Works Mondo 21C	02/28/12	C	n/a	48	51.4	16.2	45.2	65.2	61.9	0.00978	0.00928	0.0036	25	34	42	New Tire,Out of print
19	Mavic CXR Prototype 23C	08/09/13	C	23.8	47.5	50.9	21.2	45.4	60.6	57.6	0.00915	0.00930	0.0036	25	34	42	Prototypes, average of 2 tires, on Mavic Open Pro rim
20	IRC Formula Pro Light Tubeless 23C	07/26/13	C	24.6	47.5	50.9	27.6	45.7	57.5	54.6	0.00862	0.00951	0.0037	26	34	43	New Tire, Zipp 101
21	Veloflex Record 20C	10/07/11	C	n/a	48	51.4	16.6	45.6	68.4	65.0	0.01017	0.00970	0.0038	26	35	44	Well Used Tire
22	Challenge Forte Tubular 22C	02/08/13	T	21	48	51.4	14.3	45.7	71.4	67.8	0.01059	0.00977	0.0038	27	35	44	Lightly Used, well glued ~1 year before
23	Vittoria Rubino Pro Slick 23C	10/04/13	C	24.5	48	51.4	21.5	46	65.9	62.6	0.00971	0.00991	0.0039	27	36	45	New Tire
24	Challenge Criterium 320 23C	02/08/13	C	23	48	51.4	14.3	45.9	73.1	69.4	0.01080	0.00996	0.0039	27	36	45	New Tire
25	Vittoria Rubino Pro II 23C	10/04/13	C	23.7	48	51.4	21.2	45.8	66.8	63.5	0.00989	0.01005	0.0039	27	36	46	New Tire
26	Vittoria Open Corsa SR 24C	10/04/13	C	24.2	48	51.4	21.9	45.5	66.1	62.8	0.00985	0.01010	0.0040	27	37	46	New Tire
27	Continental GP4000 Black 20C, 50mi.	10/04/13	C	20.6	48	51.4	20.9	45.2	66.6	63.3	0.00999	0.01011	0.0040	27	37	46	Lightly Used ~50 miles
28	Challenge Forte Clincher 23C	02/08/13	C	24	48	51.4	14.9	45.7	73.4	69.7	0.01089	0.01013	0.0040	28	37	46	New Tire
29	Schwalbe Ironman Clincher 22C	06/22/13	C	22.9	47.5	50.9	23.7	45.8	66.1	62.8	0.00989	0.01039	0.0041	28	38	47	New Tire, on Zipp 101, average of 2 tests
30	Hutchinson Galactik Tubeless 23C	07/26/13	C	22.5	47.5	50.9	27.0	45.4	63.6	60.4	0.00960	0.01051	0.0041	29	38	48	New Tire, Zipp 101
31	Specialized Roubaix Pro 23/25C	10/18/13	C	24.6	48	51.4	20.7	45.4	70.1	66.6	0.01047	0.01057	0.0041	29	38	48	New Tire
32	Michelin Pro 4 Comp SC 23C	05/05/13	C	22.55	47.5	50.9	19.1	45.55	71.3	67.7	0.01073	0.01059	0.0041	29	38	48	New Tires, average of 2 tires
33	Challenge Triathlon 23C, R'Air tube	08/09/13	C	24.1	47.5	50.9	22.2	45.6	69.1	65.6	0.01038	0.01069	0.0042	29	39	48	New Tire, Panaracer R'Air inner tube
34	Continental GP4000 Black 20C	05/05/13	C	20.6	47.25	50.6	19.4	45.2	71.2	67.6	0.01085	0.01075	0.0042	29	39	49	New Tire, average of 2 tests
35	Bontrager AeroWing TT 19C	02/29/12	C	20.5	48	51.4	15.6	44.8	75.9	72.1	0.01149	0.01080	0.0042	29	39	49	Used Tire, Out of print
36	Continental GP4000S 23C butyl tube	04/14/13	C	24.6	47	50.3	18.6	46	73.4	69.7	0.01105	0.01084	0.0042	29	39	49	~200 miles on rear use, butyl tube, 204g
37	Michelin Pro 4 Service Course	04/14/13	C	23.3	47	50.3	21.2	45.7	72.2	68.6	0.01094	0.01112	0.0043	30	40	50	New Tire, from Flo aero testing
38	Hutchinson Atom Tubeless 23C	10/11/13	C	21.8	48	51.4	19.0	45.1	78.7	74.8	0.01183	0.01167	0.0046	32	42	53	New Tire
39	Schwalbe Ironman Clincher 22C, butyl tube	06/22/13	C	22.9	47.5	50.9	21.6	46	77.4	73.5	0.01153	0.01178	0.0046	32	43	53	Butyl tube
40	Specialized Turbo Pro 23C	10/18/13	C	23.1	48	51.4	20.0	45.1	78.9	75.0	0.01186	0.01186	0.0046	32	43	54	New Tire
41	Zipp Tangente 21C	09/19/11	C	n/a	48	51.4	22.2	45.4	77.8	73.9	0.01162	0.01197	0.0047	33	43	54	Well Used Tire
42	Specialized Turbo Elite 23C	10/18/13	C	22.8	48	51.4	20.4	45	79.2	75.2	0.01193	0.01200	0.0047	33	43	54	New Tire
43	Mavic Yksion CXR Powerlink	02/08/13	T	22	48	51.4	13.7	45.6	94.2	89.5	0.01401	0.01281	0.0050	35	46	58	Lightly Used ~60 miles
44	Vittoria Diamante Radiale 22C	02/27/12	C	21.5	48	51.4	16.8	45.6	90.7	86.2	0.01349	0.01290	0.0050	35	47	58	New Tire
45	Specialized S-Works Turbo 24C (old)	10/04/13	C	24.3	48	51.4	20.4	45.5	87.9	83.5	0.01310	0.01317	0.0052	36	48	60	New Tire (old compound/breaker)
46	Specialized All Cond. Arm. Elite 25C	10/18/13	C	25.3	48	51.4	20.8	45.7	90.2	85.7	0.01338	0.01353	0.0053	37	49	61	New Tire
47	Kenda Kaliente 23C	02/15/13	C	23	48	51.4	18.7	45.2	96.0	91.2	0.01440	0.01415	0.0055	38	51	64	Used Tire
48	Specialized All Condition Pro II 23C	04/05/13	C	24	47	50.3	18.3	45.7	107.7	102.3	0.01632	0.01594	0.0062	43	58	72	Well Used Tire, butyl tube
49	Specialized All Cond. Arm. Reflect 25C	04/05/13	C	26	47	50.3	18.6	45.8	132.4	125.8	0.02002	0.01964	0.0077	53	71	89	Well Used Tire, butyl tube
50
51			Denotes tires no longer in production


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56	Unless noted, all tires tested with latex tube on a 32 spoke Mavic Open Pro rim. Tubular tires tested on a 28 spoke low-profile rim. Tubeless tires tested on a Zipp 101 rear wheel with apparent 3W less rotating drag at 40 kph.