2023 Flatbike Change Folding MTB/Gravel Road Warrior Gravel Bike

	Small	Medium	Large
Stack	584mm	591mm	618mm
Reach	396mm	422mm	438mm
Stack to Reach Ratio	1.47:1	1.4:1	1.41:1
Seat Tube Length, Unknown	432mm	480mm	530mm
Top Tube Length, Effective/Horizontal Center	585mm	600mm	625mm
Top Tube Length, Actual C-C	566mm	574mm	608mm
Top Tube Slope	18.3deg	15deg	8.2deg
Head Tube Angle	71deg	71deg	71.5deg
Seat Tube Angle	75deg	75deg	75deg
Head Tube Length	110mm	120mm	150mm
Bottom Bracket Drop	51mm	53mm	53mm
Bottom Bracket Height	298mm	296mm	296mm
Chainstay Length	440mm	440mm	440mm
Chainstay Length Horizontal	437mm	436.8mm	436.8mm
Front-Center	638mm	660.3mm	765mm
Front-Center Horizontal	636mm	658.2mm	763.2mm
Wheelbase	1073mm	1095mm	1200mm
Fork Offset/Rake	49mm	49mm	49mm
Fork Length, Unknown	460mm	460mm	460mm
Trail	68.4mm high	68.4mm high	65.1mm high
Mechanical Trail	64.6mm	64.6mm	61.7mm
Wheel Flop	21mm	21mm	19.6mm
Standover Height	708mm	750mm	780mm
Tire to Pedal Spindle	119mm 170 mm cranks	141.3mm 170 mm cranks	246mm 170 mm cranks
Pedal Spindle to Ground Clearance	128mm 170 mm cranks	126mm 170 mm cranks	126mm 170 mm cranks

Published Sizing Recommendations

Height

5 ft 1 in

5 ft 8 in

6 ft 2 in

6 ft 7 in

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.

Category Trend

Source:https://flatbike.com/changebike-frame-geometry/