	SM	MD	LG	XL
Stack	610mm	619mm	628mm	628mm
Reach	421mm	446mm	471mm	496mm
Stack to Reach Ratio	1.45:1	1.39:1	1.33:1	1.27:1
Seat Tube Length, C-T	360mm	390mm	420mm	440mm
Top Tube Length, Effective/Horizontal HT Top	533mm	568mm	601mm	633mm
Head Tube Angle	63.6deg	63.6deg	63.6deg	63.6deg
Effective Seat Tube Angle, ETT HT Top	79deg	78.4deg	77.8deg	77.3deg
Seat Tube Exit Angle	71.6deg	71.6deg	71.6deg	71.6deg
Head Tube Length	100mm	110mm	120mm	120mm
Bottom Bracket Drop	20mm	20mm	20mm	20mm
Bottom Bracket Height	333mm	333mm	333mm	333mm
Chainstay Length Horizontal	435mm	435mm	435mm	435mm
Front-Center	756.3mm	785.3mm	814.3mm	844.2mm
Front-Center Horizontal	756mm	785mm	814mm	844mm
Wheelbase	1191mm	1220mm	1249mm	1279mm
Fork Offset/Rake	37.7mm	37.3mm	36.9mm	41.4mm
Trail	133.1mm very high	133.6mm very high	134mm very high	129mm very high
Mechanical Trail	119.2mm	119.6mm	120.1mm	115.6mm
Wheel Flop	53mm	53.2mm	53.4mm	51.4mm
Tire to Pedal Spindle	238.3mm 165 mm cranks	267.3mm 165 mm cranks	296.3mm 165 mm cranks	326.3mm 165 mm cranks
Pedal Spindle to Ground Clearance	168mm 165 mm cranks	168mm 165 mm cranks	168mm 165 mm cranks	168mm 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 Low, Single Crown

Geometry