Sizes are measured from the center of the Bottom Bracket to the top of the Seat Lug.

Rally/Road Heron

Size	Head	Seat	Rake	BB  Drop	Chain  Stay	TT
50*	72.0	74	4.0	4.5	40.5	52.5
52	73	73.5	4.5	7.5	42.5	54.5
54	73	73	4.5	7.5	42.5	55.0
56	73.5	72.5	4.25	7.5	42.5	57.0
58	73.5	72.5	4.25	7.5	42.5	58.0
60	73.5	72.5	4.25	7.5	42.5	59.0
62	73.5	72.5	4.25	7.5	42.5	60.5
64	73.5	72.5	4.3	7.5	42.5	62.0

 
 

Wayfarer/Touring Heron

Size	Head	Seat	Rake	BB  Drop	Chain  Stay	TT
51**	71.5	73.0	4.5	5.0	42.5	52.5
53**	72	73.0	4	4.9	42.5	54.5
55	72	72.5	4.5	8	45.5	56.5
57	72	72	4.5	8	45.5	57
59	72.5	72	4.25	8	45.5	58
61	72.5	72	4.25	8	45.5	59.5
63	72.5	72	4.25	8	45.5	60.5
65	72.5	72	4.3	8	45.5	62.0

Randonneur

Size	Head	Seat	Rake	BB  Drop	Chain  Stay	TT
51***	71.5	73.0	4.5	5.0	44.0	52.5
53	71.5	73.0	5.0	8	44.0	54.5
55	72.5	72.5	4.5	8	44.0	56.5
57	72.5	72	4.5	8	44.0	57
59	73	72	4.3	8	44.5	58
61	73	72	4.3	8	44.5	59.5
63	73	72	4.3	8	44.5	60.5
65	73	72	4.3	8	44.5	62.0

 
*50 cm Rally/Road uses either 26" (559 mm) or 650C (571 mm) wheels
**51 and 53 cm Wayfarer/Touring use 26" (559 mm) wheels
***51 Randonneur uses 26" (559 mm) wheels