Data Observatory

Statistical patterns gathered from fitting records worldwide — body proportions, ethnic differences, size distribution and bike-model coverage.

Global Distribution

LowHigh Bubble size ∝ records

Patterns in the Data

Height distribution

Frame size distribution

Ethnic-group body-ratio ladder

Inseam-to-height ratio by ethnic group, low to high; the dashed line is the global baseline.

Frame spread at the same height

Bike Frame Library

Frame geometry collected from official sites — cm / ° units, newest first.｜ We also keep older model years of many brands in our big-data corpus — fitting results match and recommend those too. Questions? Email: friends@fittinglab.ai

BIANCHI Sprint Road

Source：www.bianchi.com Collected 2026-09-27

Size	Stack	Reach	Top tube	Seat tube	Head tube	Head angle	Seat angle
470	49.7	37.7	51.5	42	10.5	70.5	74.5
500	50.5	38.3	52.5	45	11	71.5	74.5
530	52.9	38.4	53.5	48	12.5	72	74
550	54.5	38.8	55	50	14	73	73.5
570	56.1	39.3	56	52	15.5	73	73.5
590	58	39.6	57.5	54	17.5	73	73
610	59.9	39.7	58.5	56	19.5	73	72.5

BIANCHI Infinito Road

Source：www.bianchi.com Collected 2026-09-27

Size	Stack	Reach	Top tube	Seat tube	Head tube	Head angle	Seat angle
470	53.1	37	51.2	42	11.5	70.5	75
500	55.2	37.2	52.5	45	13.5	71	74.5
530	56.6	37.3	53.5	48	15	71	74
550	58.4	37.7	55	50	16.5	72	73.5
570	60	38.2	56	52	18	72.5	73.5
590	61.45	38.4	57.2	54	19.5	72.5	73
610	62.9	38.7	58.5	56	21	72.5	72.5

BIANCHI Oltre Road

Source：www.bianchi.com Collected 2026-09-27

Size	Stack	Reach	Top tube	Seat tube	Head tube	Head angle	Seat angle
470	47	38.5	51.5	45	8.3	70.5	74.5
500	47.8	39.2	52.5	48	8.8	71.5	74.5
530	50.4	39.3	53.6	51	10.3	72	74
550	52	39.7	55	53	11.8	72.5	73.5
570	53.6	40.2	56	55	13.3	73	73.5
590	55.5	40.6	57.5	57	15.3	73	73

BMC Teammachine R 01 ONE Road

Source：bmc-switzerland.com Collected 2026-09-27

Size	Stack	Reach	Top tube	Seat tube	Head tube	Head angle	Seat angle
47	50.4	36.8	51.5	41.8	10.8	71.5	74
51	52.8	37.8	53.2	46.3	13.3	71.5	74
54	54.8	38.7	55.2	49.9	14.9	72.3	73.5
56	56.3	39.3	56.2	51.9	16.5	72.3	73.5
58	58.2	40.2	58.2	54.1	18.4	72.3	73
61	60.8	40.9	59.8	57	21.1	72.3	73

BMC Teammachine SLR 01 ONE Road

Source：bmc-switzerland.com Collected 2026-09-27

Size	Stack	Reach	Top tube	Seat tube	Head tube	Head angle	Seat angle
47	50.6	36.7	51.5	42.2	10.8	71.5	74
51	53	37.7	53.2	46.4	13.3	71.5	74
54	55	38.6	55.2	49.1	14.9	72.3	73.5
56	56.5	39.2	56.2	50.9	16.5	72.3	73.5
58	58.4	40.1	58.2	53	18.4	72.3	73
61	60.8	40.9	59.8	55.5	21.1	72.3	73

BMC Roadmachine 01 ONE Road

Source：bmc-switzerland.com Collected 2026-09-27

Size	Stack	Reach	Top tube	Seat tube	Head tube	Head angle	Seat angle
47	52.5	37	52	41.4	11.2	71.4	74.2
51	55	37.9	53.7	46.1	13.8	71.4	74.2
54	57	38.3	54.6	48.8	15.4	72.2	74.2
56	59.5	38.8	55.9	50.8	18.1	72.2	74.2
58	62	39.3	57.1	52.9	20.7	72.2	74.2
61	64.5	39.8	58.1	55	23.3	72.2	74.2

PASSONI Animus AT-01 Road

Source：passoni.com Collected 2026-09-27

Size	Stack	Reach	Top tube	Seat tube	Head tube	Head angle	Seat angle
48	54.7	36.3	51.9	53	13.4	69	74.5
50	55.2	37	52.7	53.5	13.7	69.5	74.5
52	55.9	37.5	53.8	54.2	14.2	70	74
54	57.8	38	54.8	56.4	16	70.5	74
56	59.4	38.7	55.9	58.1	17.3	71.5	74
58	61.8	39.6	57.5	60.5	19.8	71.5	74
60	64.4	40.5	59.1	63.3	22.4	72	74

PASSONI Prima Disco Road

Source：passoni.com Collected 2026-09-27

Size	Stack	Reach	Top tube	Seat tube	Head tube	Head angle	Seat angle
48	51.9	36.1	50	49.5	13	69	75.5
50	52.6	36.8	51.3	50.3	13.4	70	75
52	54	37.5	52.7	52	14.5	71	74.5
54	55.9	38.3	54.5	54.1	16.4	71.5	74
56	58.4	38.9	56	56.7	18.8	72	73.8
58	60.8	39.4	58	59.5	21.1	72.5	73
60	62.2	40.5	59.6	61	22.5	72.5	73

LOOK 785 Huez RS Road

Source：www.lookcycle.com Collected 2026-09-27

Size	Stack	Reach	Top tube	Seat tube	Head tube	Head angle	Seat angle
XS	51.92	36.53	50.93	48	9.44	71.5	74.5
S	54.33	37.53	52.6	50.4	11.96	71.5	74.5
M	56.73	38.56	54.3	53	14.07	73	74.5
L	59.13	39.55	55.96	55.4	16.58	73	74.5
XL	61.53	40.56	57.63	57.9	19.35	73	74.5

LOOK 795 Blade RS 3 Road

Source：www.lookcycle.com Collected 2026-09-27

Size	Stack	Reach	Top tube	Seat tube	Head tube	Head angle	Seat angle
XXS	48.62	36.13	49.16	46.3	7.79	70.7	75
XS	50.12	37.13	51.02	47.96	9.04	71.8	74.5
S	52.52	38.13	52.69	50.44	11.56	71.8	74.5
M	54.92	39.12	54.35	52.99	13.67	73	74.5
L	57.32	40.12	56.01	55.48	16.18	73	74.5
XL	59.72	41.12	57.68	57.97	18.95	73	74.5

CANNONDALE Synapse Alloy Road

Source：www.cannondale.com Collected 2026-09-27

Size	Stack	Reach	Top tube	Seat tube	Head tube	Head angle	Seat angle
44	51	36.5	52.1	40	9.6	70.2	73
48	53	37.1	53.3	42.2	11.5	70.8	73
51	55	37.6	54.4	44.3	14	71	73
54	57	38.1	55.5	48	16	71.9	73
56	59	38.7	56.7	52	18.1	72	73
58	61	39.3	58	55	20.5	72	73
61	64	40.2	59.8	59	23.6	72	73

CANNONDALE SuperSix EVO Road

Source：www.cannondale.com Collected 2026-09-27

Size	Stack	Reach	Top tube	Seat tube	Head tube	Head angle	Seat angle
44	49.5	37.3	51	40	8.9	70.9	74.5
48	50.8	37.6	52.2	42.9	10.1	71.2	74
50	52	37.9	52.9	44.8	11.4	71.2	74
52	53.2	38.3	53.6	46.7	13	71.2	74
54	54.5	38.7	54.4	49	14.3	71.2	74
56	56.5	39.3	56	51	15.4	73	73.5
58	58.5	39.8	57.7	53.2	17.8	73	73
61	61.5	40.6	60	57	20.9	73	72.5

CERVÉLO Caledonia-5 Road

Source：www.cervelo.com Collected 2026-09-27

Size	Stack	Reach	Top tube	Seat tube	Head tube	Head angle	Seat angle
48	50.5	36	50.2	—	8.95	70.5	74.5
51	53	36.9	52.2	—	11.03	71.5	74
54	55.5	37.8	54.3	—	13.63	72	73.5
56	58	38.7	56.5	—	16.26	72	73
58	60.5	39.6	58.1	—	19.15	72	73
61	63	40.5	59.8	—	21.78	72	73

CERVÉLO R5 Road

Source：www.cervelo.com Collected 2026-09-27

Size	Stack	Reach	Top tube	Seat tube	Head tube	Head angle	Seat angle
48	49.61	36.87	50.6	—	8.96	71	74.5
51	52.02	37.65	52.6	—	10.93	72	74
54	54.46	38.33	54.5	—	13.2	73	73.5
56	56.75	39.11	56.5	—	15.6	73	73
58	59.07	40.03	58.1	—	18.28	73	73
61	61.07	40.83	59.5	—	20.37	73	73

CERVÉLO S5 Road

Source：www.cervelo.com Collected 2026-09-27

Size	Stack	Reach	Top tube	Seat tube	Head tube	Head angle	Seat angle
48	49.6	36.7	52	—	6.4	71	73
51	51.9	37.6	53.5	—	8.2	72	73
54	54.2	38.4	55	—	10.4	73	73
56	56.5	39.2	56.5	—	12.5	73.5	73
58	58.8	40.1	58.1	—	15.2	73.5	73
61	60.8	40.9	59.5	—	17.3	73.5	73

CANYON Aeroad CF SLX 7 Di2 Road

Source：www.canyon.com Collected 2026-09-27

Size	Stack	Reach	Top tube	Seat tube	Head tube	Head angle	Seat angle
2XS	49.8	37.2	52	44.1	8.8	70	73.5
S	53.9	39	54.9	50.1	12.1	72.8	73.5
M	56	39.3	55.9	53.1	14.2	73.25	73.5
XL	60.6	41.9	59.8	59.1	18.8	73.5	73.5
XS	52	37.8	53.2	47.1	10.7	71.2	73.5
L	58	40.1	57.2	56.1	16.2	73.3	73.5
2XL	62.4	42.9	61.3	62.1	20.6	73.8	73.5

CANYON Endurace CF 7 Road

Source：www.canyon.com Collected 2026-09-27

Size	Stack	Reach	Top tube	Seat tube	Head tube	Head angle	Seat angle
2XL	64.9	42.7	61.9	61.2	22.6	72.8	73.5
2XS	52.5	38.2	53.7	43.2	10.4	70.3	73.5
XS	54.5	38.6	54.7	46.2	12.3	71	73.5
S	56.3	39	55.7	49.2	13.9	71.8	73.5
M	58.4	39.2	56.5	52.2	15.8	72.5	73.5
L	60.5	40.1	58	55.2	18	72.5	73.5
XL	62.9	40.9	59.6	58.2	20.4	72.8	73.5

CANYON Ultimate CF 7 Road

Source：www.canyon.com Collected 2026-09-27

Size	Stack	Reach	Top tube	Seat tube	Head tube	Head angle	Seat angle
XL	60.6	41.9	59.4	57	18.8	73.5	73.5
2XL	62.4	42.9	61	60	20.6	73.8	73.5
2XS	49.8	37.2	51.6	42	11.5	70	73.9
XS	52	37.8	52.9	45	10.7	71.2	73.9
S	53.9	39	54.6	48	12.1	72.8	73.5
M	56	39.3	55.5	51	14.2	73.25	73.5
L	58	40.1	56.9	54	16.2	73.3	73.5

XDS AD7 2026 Road

Source：www.xidesheng.com Collected 2026-09-27

Size	Stack	Reach	Top tube	Seat tube	Head tube	Head angle	Seat angle
XS	51	36.8	50.4	47	10.5	70.7	75.1
S	52.5	37.6	52.3	49.5	11.8	71.5	74.5
M	54	38.7	54	52	13	72.5	74
L	55.8	39.5	55.9	54	14.8	73	73.5
XL	58	40.5	57.9	56.5	17.1	73.2	73.2

XDS X-LAB AD8 Road

Source：www.xidesheng.com Collected 2026-09-27

Size	Stack	Reach	Top tube	Seat tube	Head tube	Head angle	Seat angle
XS	50.5	37.1	50.4	47	10.5	70.9	75.1
S	52	37.9	52.3	50.3	11.8	71.5	74.5
M	53.4	38.7	54	51.5	13	72.5	74
L	55.3	39.5	55.9	54.3	14.8	73	73.5
XL	58.7	40.5	57.9	56.8	17.1	73.2	73.2

XDS X-LAB AD9 Road

Source：www.xidesheng.com Collected 2026-09-27

Size	Stack	Reach	Top tube	Seat tube	Head tube	Head angle	Seat angle
XS	50.5	37.1	50.4	47	10.5	70.9	75.1
S	52	37.9	52.3	50.3	11.8	71.5	74.5
M	53.4	38.7	54	51.5	13	72.5	74
L	55.3	39.5	55.9	54.3	14.8	73	73.5
XL	58.7	40.5	57.9	56.8	17.1	73.2	73.2

GIANT Propel Advanced SL 0-DA Road

Source：www.giant.com.cn Collected 2026-09-27

Size	Stack	Reach	Top tube	Seat tube	Head tube	Head angle	Seat angle
XS	51.5	37.7	52	68	11.5	71.5	74.5
S	53	38.3	53.5	71	12.7	72.5	74
M	54.6	38.8	55	74	14.5	73	73.5
ML	56.5	39.2	56.5	77	16.5	73	73
L	58.2	40.2	58	80	18.5	73	73
XL	59.6	41.2	60	83	20	73	72.5

GIANT TCR Advanced SL 0-DA Road

Source：www.giant.com.cn Collected 2026-09-27

Size	Stack	Reach	Top tube	Seat tube	Head tube	Head angle	Seat angle
XS	51.7	37.6	52	68	12	71	74.5
S	52.8	38.3	53.5	71	13	72.25	74
M	54.5	38.8	55	74	14.5	73	73.5
ML	56.2	39.3	56.5	77	16.5	73	73
L	58.1	40.2	58	80	18.5	73	73

PINARELLO Pinarello F Road

Source：pinarello.com Collected 2026-09-27

Size	Stack	Reach	Top tube	Seat tube	Head tube	Head angle	Seat angle
430	50.2	35.13	50	43	10.2	69.5	74.4
465	51.73	36.54	51.5	46.5	10.9	70.5	74.4
500	52.52	37.22	52.5	50	11.4	71.4	74
515	53.21	37.82	53.5	51.5	11.9	72	73.7
530	54.24	38.56	54.5	53	12.8	72.5	73.7
545	55.77	38.83	55.5	54.5	14.3	72.8	73.4
560	57.01	39.08	56.5	56	15.45	73.2	73
575	59.92	39.55	57.8	57.5	18.3	73.7	73
595	63.34	40.04	60	59.5	22.5	73.4	72.4

PINARELLO Dogma F Road

Source：pinarello.com Collected 2026-09-27

Size	Stack	Reach	Top tube	Seat tube	Head tube	Head angle	Seat angle
430	50.2	35.15	50	43	10.2	69.5	74.4
465	51.73	36.54	51.5	46.5	10.9	70.5	74.4
500	52.52	37.22	52.5	50	11.4	71.4	74
515	53.21	37.82	53.5	51.5	11.9	72	73.7
530	54.24	38.33	54.5	53	12.8	72.5	73.7
540	55.1	38.53	55	54	13.6	72.8	73.4
550	56.15	38.92	55.7	55	14.7	72.8	73.4
560	57.01	39.08	56.5	56	15.45	73.2	73
575	58.48	39.67	57.5	57.5	16.8	73.7	73
595	61.32	39.34	58.7	59.5	20.4	73.4	72.4
620	65.16	41	62	62	24.4	73.4	72

COLNAGO Y1Rs Road

Source：139650070.fs1.hubspotusercontent-eu1.net Collected 2026-09-27

Size	Stack	Reach	Top tube	Seat tube	Head tube	Head angle	Seat angle
XS	49.5	36.8	—	—	8.85	70.8	75
S	52	37.7	—	—	10.85	71.9	74.5
M	54	38.6	—	—	12.65	73	74
L	56.5	39.5	—	—	15.05	73.5	73.7
XL	59	40.4	—	—	17.65	73.5	73

COLNAGO V4Rs Road

Source：139650070.fs1.hubspotusercontent-eu1.net Collected 2026-09-27

Size	Stack	Reach	Top tube	Seat tube	Head tube	Head angle	Seat angle
420	51	37	50.4	42	10.3	70.6	75.5
455	52.2	37.5	51.7	45.5	11.4	71	75
485	53.9	38.3	53.5	48.5	13	71.5	74.5
510	55.7	38.8	55	51	14.8	71.8	74
530	57.5	39.5	56.7	53	16.4	72.5	73.5
550	59.3	40.3	58.6	55	18.1	72.9	73
570	61.2	41	59.9	57	20	73.1	73

SPECIALIZED Allez Road

Source：www.specialized.com Collected 2026-09-27

Size	Stack	Reach	Top tube	Seat tube	Head tube	Head angle	Seat angle
44	51.9	35.6	49.3	43	11	69.5	75.25
49	53.6	35.9	50	46	12.5	70.5	75.25
52	55.2	36.4	53	49	14	71	73.25
54	56.9	37	54.1	51	15.5	72	73.25
56	59	37.8	55.6	53	17.5	72.5	73.25
58	61	38.6	56.9	55	19.5	73	73.25
61	64.3	39.2	58.6	58	23	73	73.25

SPECIALIZED Tarmac SL8 Road

Source：www.specialized.com Collected 2026-09-27

Size	Stack	Reach	Top tube	Seat tube	Head tube	Head angle	Seat angle
44	50.1	36.6	49.6	43.3	9.9	70.5	75.5
49	51.4	37.5	50.9	44.5	10.9	71.75	75.5
52	52.7	38	53.1	45.6	12	72.5	74
54	54.4	38.4	54.1	47.3	13.7	73	74
56	56.5	39.5	56.3	49.4	15.7	73.5	73.5
58	59.1	40.2	57.7	51.5	18.4	73.5	73.5
61	61.2	40.8	59.5	54.5	20.4	74	73

TREK Émonda ALR Road

Source：www.trekbikes.com Collected 2026-09-27

Size	Stack	Reach	Top tube	Seat tube	Head tube	Head angle	Seat angle
50	52.1	37.8	52.1	45.3	11.1	72.1	74.6
52	53.3	38.3	53.4	48.3	12.1	72.8	74.2
54	54.1	38.6	54.3	49.6	13.1	73	73.7
56	56.3	39.1	55.9	52.5	15.1	73.5	73.3
58	58.1	39.6	57.4	55.3	17.1	73.8	73
60	60.1	39.9	58.6	57.3	19.1	73.9	72.8
62	62	40.3	59.8	59.3	21.1	73.9	72.5

TREK Domane SLR Road

Source：www.trekbikes.com Collected 2026-09-27

Size	Stack	Reach	Top tube	Seat tube	Head tube	Head angle	Seat angle
XS	52.4	36.8	52	44.4	10.6	71.3	73.5
S	55.5	37.1	53	47.6	13.9	71.1	73.7
M	57.5	37.4	54.1	50	15.9	71.2	73.5
ML	59.6	37.7	55.3	53.3	17	71.9	73.3
L	61.8	38	56.2	55.3	19.2	72	73.3
XL	64.8	38.4	57.5	59.3	22.6	72.1	73.3

TREK Madone SLR Road

Source：www.trekbikes.com Collected 2026-09-27

Size	Stack	Reach	Top tube	Seat tube	Head tube	Head angle	Seat angle
XS	50.7	37	51.7	40.4	10	71.6	73.8
S	53	37.8	53.2	44	12.1	72.2	73.8
M	54.6	38.4	54.5	47.6	13.6	72.9	73.6
ML	56.2	38.9	55.7	51.2	15	73.5	73.4
L	58.2	39.4	56.8	54.8	17.2	73.8	73.4
XL	61	40.2	58.4	60.9	20.1	73.9	73.4

Open API · Coming Soon

We are packaging this data into a self-serve, read-only API for developers working on bike-model matching, body profiling and regional trend analysis.

GET /api/public/statsGlobal / per-region record counts and coverage
GET /api/public/distributionHeight, frame size and other distribution histograms
GET /api/public/ratiosEthnic-group body ratios and averages

Sample response

Apply for access: Andata