2025 BMC Switzerland Twostroke al 20

Category
Kids MTB
Design
Flat Bar, Rigid, non-suspension corrected
Frame
Aluminum
Fork
Aluminum
Features
Disc brake
Somewhat aggressive stack and reachvs category

Geometry

20
Stack
412mm
Reach
305mm
Stack to Reach Ratio
1.35:1
Seat Tube Length, C-C
275mm
Top Tube Length, Effective/Horizontal Unknown
431mm
Head Tube Angle
68deg
Seat Tube Angle
73deg
Head Tube Length
105mm
Bottom Bracket Drop
40mm
Bottom Bracket Height
224mm
Chainstay Length Horizontal
342mm
Front-Center
455mm
Front-Center Horizontal
491mm
Wheelbase
833mm
Fork Offset/Rake
35mm
Fork Length, Unknown
307mm
Trail
68.9mm
high
Mechanical Trail
63.9mm
Wheel Flop
23.9mm
Standover Height
490mm
Tire to Pedal Spindle
64mm
127 mm cranks
Pedal Spindle to Ground Clearance
97mm
127 mm cranks

20 Build

20
Wheel Size
20 in (406)
406 mm BSD
Tire Width
2.4in
Tire Outer Diameter
527.9mm
Bike Length with Tires
1360.9mm
Crank Length
127mm
Handlebar Width
650mm
Stem Length
35mm
Stem Angle
6deg

Published Sizing Recommendations

Height
110 cm
to
135 cm

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
Kids MTB