	SM	MD	LG	XL
Stack	607mm	616mm	625mm	625mm
Reach	425mm	450mm	475mm	500mm
Stack to Reach Ratio	1.43:1	1.37:1	1.32:1	1.25:1
Seat Tube Length, C-T	360mm	390mm	420mm	440mm
Top Tube Length, Effective/Horizontal HT Top	538mm	573mm	606mm	638mm
Head Tube Angle	64deg	64deg	64deg	64deg
Effective Seat Tube Angle, ETT HT Top	79.4deg	78.7deg	78.2deg	77.7deg
Seat Tube Exit Angle	72deg	72deg	72deg	72deg
Head Tube Length	100mm	110mm	120mm	120mm
Bottom Bracket Drop	15mm	15mm	15mm	15mm
Bottom Bracket Height	338mm	338mm	338mm	338mm
Chainstay Length Horizontal	435mm	435mm	435mm	435mm
Front-Center	756.2mm	785.1mm	814.1mm	844.1mm
Front-Center Horizontal	756mm	785mm	814mm	844mm
Wheelbase	1191mm	1220mm	1249mm	1279mm
Fork Offset/Rake	38mm	37.6mm	37.3mm	41.8mm
Trail	129.9mm very high	130.3mm very high	130.7mm very high	125.7mm very high
Mechanical Trail	116.7mm	117.1mm	117.4mm	113mm
Wheel Flop	51.2mm	51.3mm	51.5mm	49.5mm
Tire to Pedal Spindle	238.2mm 165 mm cranks	267.2mm 165 mm cranks	296.2mm 165 mm cranks	326.2mm 165 mm cranks
Pedal Spindle to Ground Clearance	173mm 165 mm cranks	173mm 165 mm cranks	173mm 165 mm cranks	173mm 165 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://www.transitionbikes.com/Bikes/Bottlerocket

2026 Transition Bikes Bottlerocket High, Single Crown

Geometry