2014 Chromag Bikes Aperture Base

	Small	Medium	M/L	Large
Stack	602mm	602mm	602mm	602mm
Reach	381mm	400mm	420mm	436mm
Stack to Reach Ratio	1.58:1	1.51:1	1.43:1	1.38:1
Seat Tube Length, C-T	394mm	432mm	470mm	495mm
Top Tube Length, Effective/Horizontal Unknown	559mm	584mm	603mm	618mm
Top Tube Slope	24.4deg	19.7deg	15.3deg	12.5deg
Head Tube Angle	68deg	68deg	68deg	68deg
Seat Tube Angle	73deg	73deg	73deg	73deg
Head Tube Length	114mm	114mm	114mm	114mm
Bottom Bracket Drop	19.9mm	19.9mm	19.9mm	19.9mm
Bottom Bracket Height	318mm	318mm	318mm	318mm
Chainstay Length	419mm	419mm	419mm	419mm
Chainstay Length Horizontal	418.5mm	418.5mm	418.5mm	418.5mm
Front-Center	663.9mm	682.9mm	702.9mm	718.9mm
Front-Center Horizontal	663.6mm	682.6mm	702.6mm	718.6mm
Wheelbase	1082.2mm	1101.2mm	1121.2mm	1137.2mm
Fork Offset/Rake	44mm	44mm	44mm	44mm
Fork Length (Axle-To-Crown)	532mm	532mm	532mm	532mm
Trail	89.1mm very high	89.1mm very high	89.1mm very high	89.1mm very high
Mechanical Trail	82.6mm	82.6mm	82.6mm	82.6mm
Wheel Flop	30.9mm	30.9mm	30.9mm	30.9mm
Tire to Pedal Spindle	156mm 170 mm cranks	175mm 170 mm cranks	195mm 170 mm cranks	211mm 170 mm cranks
Pedal Spindle to Ground Clearance	148mm 170 mm cranks	148mm 170 mm cranks	148mm 170 mm cranks	148mm 170 mm cranks

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://chromagbikes.com/pages/2014-aperture

Geometry