2022 Serk Titanium A30 Base

	XS	S	M	L	XL
Stack	506mm	529mm	552mm	575mm	598mm
Reach	365mm	374mm	382mm	390mm	398mm
Stack to Reach Ratio	1.39:1	1.41:1	1.45:1	1.47:1	1.5:1
Seat Tube Length, C-T	470mm	490mm	510mm	530mm	550mm
Top Tube Length, Effective/Horizontal HT Top	506mm	526mm	545mm	567mm	587mm
Top Tube Slope	6.2deg	6.5deg	6.8deg	7.1deg	7.4deg
Head Tube Angle	70.5deg	72deg	72.5deg	73deg	73.5deg
Seat Tube Angle	74.5deg	74deg	73.5deg	73deg	72.5deg
Head Tube Length	95mm	111mm	134mm	156mm	178mm
Bottom Bracket Drop	73mm	73mm	73mm	73mm	73mm
Bottom Bracket Height	268mm	268mm	268mm	268mm	268mm
Chainstay Length	418mm	418mm	418mm	418mm	418mm
Chainstay Length Horizontal	411.6mm	411.6mm	411.6mm	411.6mm	411.6mm
Front-Center	577.1mm	572.1mm	583mm	592.9mm	602.9mm
Front-Center Horizontal	572.4mm	567.4mm	578.4mm	588.4mm	598.4mm
Wheelbase	984mm	979mm	990mm	1000mm	1010mm
Fork Offset/Rake	50mm	43mm	43mm	43mm	43mm
Trail	67.7mm high	65.6mm high	62.4mm mid/neutral	59.3mm mid/neutral	56.2mm mid/neutral
Mechanical Trail	63.8mm	62.4mm	59.5mm	56.7mm	53.9mm
Wheel Flop	21.3mm	19.3mm	17.9mm	16.6mm	15.3mm
Tire to Pedal Spindle	66.1mm 170 mm cranks	61.1mm 170 mm cranks	72mm 170 mm cranks	81.9mm 170 mm cranks	91.9mm 170 mm cranks
Pedal Spindle to Ground Clearance	98mm 170 mm cranks	98mm 170 mm cranks	98mm 170 mm cranks	98mm 170 mm cranks	98mm 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://www.serk.cc/a30-2/

Geometry