Bike sizing and frame-fork details.

Quick guide to working out your size. 

Frame sizes.	XS	S	M	L	XL	XXL
Tyre size on bike as supplied.	26 x 1.4" radius 317mm	700 x 35C radius 347mm	700 x 35C	700 x 35C	700 x 35C	700 x 35C
Seat tube C to Top (mm)	384      (15-1/8")	430           (17")	490       (19-1/4")	540      (21-1/4")	590      (23-1/4")	630      (24-3/4")
Seat tube C to upper edge of top tube(mm)	345      (13-1/2")	390       (15-3/8")	459             (18")	508            (20")	558           (22")	597      (23-1/2")
Top tube effective (mm)	498      (19-5/8")	541       (21-1/4")	566       (22-1/4")	575       (22-5/8")	590     (23-1/4")	620      (24-3/8")
Head tube (mm)	100            (4")	100              (4")	145              (5")	165         (6-1/2")	180            (7")	180              (7")
Standeover height in middle of TT	665           (26")	722       (28-1/2")	776       (30-1/2")	808       (31-3/4")	844      (33-1/4")	859            (34")
Normal rider height range (cm)	150-157 (59-61")	157-165 (61-66")	165-175  (65-70")	175-183  (69-72")	183-193 (72-76")	193-201 (76-79")
Bottom Bracket drop (mm)	50              (2")	75               (3")	75                (3")	75                (3")	75               (3")	75               (3")
Wheel base (mm)	989   (38-1516")	1050    (41-3/8")	1072    (42-3/16")	1077     (42"-3/8)	1087     (42-3/4")	1111     (43-3/4")
Chain stays C to C (mm)	430  (16-15/16")	450       (17-3/4")	450       (17-3/4")	450       (17-3/4")	450      (17-3/4")	450       (17-3/4")
Head angle (degrees)	71	71	71	71	71	71
Seat angle (degrees)	74.5	74.5	74	73.5	73	72.5
Fork length axle centre to under crown race (mm)	388      (15-1/4")	403      (15-7/8")	403       (15-7/8")	403       (15-7/8")	403     (15-7/8")	403      (15-7/8")
Fork trail with 35C tyres	62mm	66mm	66mm	66mm	66mm	66mm
Fork mechanical trail with 35C tyres	59mm	62mm	62mm	62mm	62mm	62mm
Fork rake (mm)	45	52	52	52	52	52
Sit Bone to Handlebar Top Centre	605      (23-3/4")	655       (25-3/4")	710            (28")	730       (28-3/4")	780       (30-3/4")	820       (32-1/4")
Crank length (mm)	165	165	170	170	175	175
Stem length (mm)	60	60	80	100	120	120
Handlebar width Trekking bar (mm)	580	580	580	580	580	580
Handlebar width drop-STI (mm)	420	440	440	460	460	460
Handlebar width drop-barend (mm)	420	420	420	450	450	450

C-C means centre to centre

All dimensions subject to change

Some features of the the VWR geometry are

• coverage of people over a large height range. 150 cm to over two metres.
• use of a smaller wheel diamater on the XS size thereby allows a shorter top tube and an virtually unchanged head angle and fork trail. This is much easier to achieve with a slightly smaller wheel.
• Trail above 60mm providing a sense that the bike is very easy to steer, so easy to ride for a long period.
• relatively low bottom bracket heights making the bikes comfortable and easy to ride. Higher bottom brackets are more typical on competition (including cyclocross) bikes.
• 450mm length chainstays (430 on XS which has smaller wheels) to give heel clearance from panniers.
• There are mounts for spare spokes on the left side seatstay.
• There are lighting wire mounts to keep the wires (which are in housing) tidy and to comfortably survive if the bike is packed for plane travel multiple times.
• The 26" size has two water bottle mounts and the 700C sizes all have three water bottle mounts.
• fork steerer tubes on 2013 models are "uncut" allowing a wide range of handlebar heights. The idea is to use the bike for a while before finally settling on a stem height and then having the excess steerer tube cut off.