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Bike Transmissions - Reference
Below is a reference table which shows the standard calculations for a few known bikes.
See Gear Ratios Document

Upd  Title  Front  Rear  LowRatio  HighRatio  ChainS  Range  TireD  LowInch  HighInch     Search Term       SortOrder Title LowRatio HighRatio Range TireD LowInch HighInch ChainS

Title	Front	Rear	LowRatio	HighRatio	ChainS	Range	TireD	LowInch	HighInch
Low Gear Gravel Bike (Hypothetical)	36/22	11-36	0.61	3.3	39	541%	27	16	89
Masi Giramondo	44/32/22	11-36	0.61	4.0	47	656%	27	16	108
Custom 9.36 Opus Extreme	42/32/22	11-36	0.61	3.8	45	623%	27	16	103
Custom 9.34 (Opus)	42/32/22	11-34	0.65	3.8	43	585%	27	18	103
Custom 8.34	42/32/22	11-34	0.65	3.8	43	585%	27	18	103
Brodie Quantum (Yellow, Betsy)	42/34/22	11-32	0.69	3.8	41	551%	26	18	99
Rocky Mountain (Robin) 1993	42/32/22	12-32	0.69	3.5	40	507%	26	18	91
Custom	48/38/28	11-42	0.67	4.4	51	657%	27	18	119
Custom 9.32	42/32/22	11-32	0.69	3.8	41	551%	27	19	103
Custom 8.32 (Brodie)	42/32/22	11-32	0.69	3.8	41	551%	27	19	103
Specialized Diverge (low front, rear)	46/30	11-42	0.71	4.2	47	592%	27	19	113
Trek 520 Large Size	48/36/26	11-36	0.72	4.4	47	611%	27	19	119
Surly Disk Trucker 2021	48/36/26	11-34	0.76	4.4	45	579%	27	21	119
Devinci Stockholm (Steve)	48/36/26	11-34	0.76	4.4	45	579%	27	21	119
Specialized Diverge (Maria)	48/32	11-42	0.76	4.4	47	579%	27	21	119
Custom	48/38/28	11-36	0.78	4.4	45	564%	27	21	119
Moulton (Jacques B)	56/44/34	11-27	1.26	5.1	38	405%	16.79	21	86
Miyata with 8sp Cassette	50/40/28	11-34	0.82	4.5	45	549%	27	22	122
Opus Legato	48/38/28	11-34	0.82	4.4	43	537%	27	22	119
Brodie Elan with 36 tooth cassette	46/30	11-36	0.83	4.2	41	506%	27	22	113
Surly LHT	50/39/30	11-36	0.83	4.5	45	542%	27	22	122
Specialized Diverge Sport (Steve G)	46/30	11-34	0.88	4.2	39	477%	27	24	113
Brodie Elan (Standard) 2021	46/30	11-34	0.88	4.2	39	477%	27	24	113
Brodie Roam 2020	46/30	11-34	0.88	4.2	39	477%	27	24	113
Moulton Speed (17" wheels)	58/44	10-30	1.47	5.8	34	395%	17	25	99
Miyata 1000 (Robin)	50/40/28	14-30	0.93	3.6	38	387%	27	25	97
Specialized Women's Comp	48/32	11-34	0.94	4.4	39	468%	27	25	119
Giant Toughroad SLR GX1	48/32	11-34	0.94	4.4	39	468%	27	25	119
Rocky Mountain Solo	40	11-42	0.95	3.6	31	379%	27	26	97
Diverge 2022	50/34	11-34	1.00	4.5	39	450%	27	27	122
Brodie Romulus	50/34	11-34	1.00	4.5	39	450%	27	27	122
Custom Wolf	52/38	14-38	1.00	3.7	38	370%	27	27	100
Trek 1.5 - Shimano 105 (BillM)	50/34	11-32	1.06	4.5	37	425%	27	29	122
Green Holdsworth (Steve)	50/32	14-30	1.07	3.6	34	336%	27	29	97
SRAM Force 1 Setup	48	10-42	1.14	4.8	32	421%	27	31	130
Blue Norco (Robin)	52/40	13-34	1.18	4.0	33	339%	27	32	108
Chris K Folding bike	58	12-34	1.71	4.8	22	281%	20	34	96
Brompton 6HR (has internal hub)	50	16	3.13	3.1	null	99%	16	50	50

Total: 38