2023 BMC Switzerland 257 AL Three

Category
Commuter
Design
Flat Bar, Rigid, non-suspension corrected
Frame
Aluminum
Fork
Aluminum
Features
Disc brake, Single-speed capable
Somewhat aggressive stack and reachvs category
Somewhat aggressive stack and reachvs category
Somewhat upright stack and reachvs category
Somewhat upright stack and reachvs category
Somewhat aggressive stack and reachvs category
Somewhat aggressive stack and reachvs category
Average stack and reachvs category
Average stack and reachvs category
Average stack and reachvs category
Average stack and reachvs category

Geometry

S
S
S
S - Real
M
M
L
L
XL
XL
Stack
560mm
560mm
590mm
590mm
590mm
590mm
620mm
620mm
650mm
650mm
Reach
400mm
400mm
390mm
390mm
415mm
415mm
425mm
425mm
440mm
440mm
Stack to Reach Ratio
1.4:1
1.4:1
1.51:1
1.51:1
1.42:1
1.42:1
1.46:1
1.46:1
1.48:1
1.48:1
Seat Tube Length, Unknown
480mm
480mm
450mm
450mm
510mm
510mm
540mm
540mm
555mm
555mm
Top Tube Length, Unknown
560mm
560mm
559mm
559mm
584mm
584mm
603mm
603mm
626mm
626mm
Top Tube Slope
10.5deg
10.5deg
17deg
17deg
10.2deg
10.2deg
10deg
10deg
11.1deg
11.1deg
Head Tube Angle
70deg
70deg
70deg
70deg
70deg
70deg
70deg
70deg
70deg
70deg
Seat Tube Angle
74deg
74deg
74deg
74deg
74deg
74deg
74deg
74deg
74deg
74deg
Head Tube Length
133mm
133mm
165mm
165mm
165mm
165mm
197mm
197mm
229mm
229mm
Bottom Bracket Drop
67mm
67mm
67mm
67mm
67mm
67mm
67mm
67mm
67mm
67mm
Bottom Bracket Height
281mm
281mm
281mm
281mm
281mm
281mm
281mm
281mm
281mm
281mm
Chainstay Length
440mm
440mm
440mm
440mm
440mm
440mm
440mm
440mm
440mm
Chainstay Length Horizontal
434.9mm
434.9mm
434.9mm
434.9mm
434.9mm
434.9mm
434.9mm
434.9mm
434.9mm
Front-Center
631mm
631mm
632mm
632mm
657mm
657mm
677mm
677mm
703mm
703mm
Front-Center Horizontal
627.1mm
627.1mm
628.4mm
628.1mm
653.1mm
653.1mm
674.1mm
674.1mm
700.1mm
700.1mm
Wheelbase
1062mm
1062mm
1063mm
1063mm
1088mm
1088mm
1109mm
1109mm
1135mm
1135mm
Fork Offset/Rake
45mm
45mm
45mm
45mm
45mm
45mm
45mm
45mm
45mm
45mm
Fork Length (Axle-To-Crown)
408mm
408mm
408mm
408mm
408mm
408mm
408mm
408mm
408mm
408mm
Trail
78.8mm
high
78.8mm
high
78.8mm
high
78.8mm
high
78.8mm
high
78.8mm
high
78.8mm
high
78.8mm
high
78.8mm
high
78.8mm
high
Mechanical Trail
74mm
74mm
74mm
74mm
74mm
74mm
74mm
74mm
74mm
74mm
Wheel Flop
25.3mm
25.3mm
25.3mm
25.3mm
25.3mm
25.3mm
25.3mm
25.3mm
25.3mm
25.3mm
Standover Height
760mm
760mm
644mm
644mm
790mm
790mm
819mm
819mm
838mm
838mm
Tire to Pedal Spindle
113mm
170 mm cranks
113mm
170 mm cranks
114mm
170 mm cranks
114mm
170 mm cranks
139mm
170 mm cranks
139mm
170 mm cranks
154mm
175 mm cranks
154mm
175 mm cranks
180mm
175 mm cranks
180mm
175 mm cranks
Pedal Spindle to Ground Clearance
111mm
170 mm cranks
111mm
170 mm cranks
111mm
170 mm cranks
111mm
170 mm cranks
111mm
170 mm cranks
111mm
170 mm cranks
106mm
175 mm cranks
106mm
175 mm cranks
106mm
175 mm cranks
106mm
175 mm cranks

Three Build

S
S
S
S - Real
M
M
L
L
XL
XL
Wheel Size
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
Tire Width
37mm
37mm
37mm
37mm
37mm
37mm
37mm
37mm
37mm
37mm
Tire Width Max
42mm
42mm
42mm
42mm
42mm
42mm
42mm
42mm
42mm
42mm
Tire Outer Diameter
696mm
696mm
696mm
696mm
696mm
696mm
696mm
696mm
696mm
696mm
Bike Length with Tires
1758mm
1758mm
1759mm
1759mm
1784mm
1784mm
1805mm
1805mm
1831mm
1831mm
Crank Length
170mm
170mm
170mm
170mm
170mm
170mm
175mm
175mm
175mm
175mm
Handlebar Width
600mm
600mm
600mm
600mm
600mm
600mm
600mm
600mm
600mm
600mm
Stem Length
90mm
90mm
90mm
90mm
90mm
90mm
100mm
100mm
100mm
100mm
Stem Angle
8deg
8deg
8deg
8deg
8deg
8deg
8deg
8deg
8deg
8deg

Published Sizing Recommendations

Height
14 ft 0 in
to
14 ft 0 in
to
155 cm
to
170 cm
12 ft 11 in
to
14 ft 2 in
14 ft 0 in
to
14 ft 0 in
to
14 ft 10 in
to
14 ft 10 in
to
15 ft 10 in
to
15 ft 10 in
to

Stack and Reach vs. Category Trend

Very Upright
Somewhat Upright
Average
Somewhat Aggressive
Very Aggressive

The Bike Insights Upright/Aggressive scale is based on analysis of a bike’s proportions relative to similar sized bikes in the same category.

Learn more about the Upright/Aggressive Scale
Category Trend
Commuter
Source:https://www.bmc-switzerland.com/eu_en/bmc-257-al-three-23.html, https://www.bmc-switzerland.com/us_en/bmc-257-al-one-st-23.html, https://www.bmc-switzerland.com/ch_fr/bmc-257-al-three-st-23.html