2015 Boardman Bikes Air TT 9.0 Base

	XS	S	M	L
Stack	493mm	500mm	519mm	537mm
Reach	400mm	404mm	419mm	435mm
Stack to Reach Ratio	1.23:1	1.24:1	1.24:1	1.23:1
Seat Tube Length, C-T	490mm	490mm	510mm	530mm
Top Tube Length, Actual C-C	510mm	530mm	555mm	570mm
Top Tube Slope	1.6deg	2.3deg	2.2deg	2deg
Head Tube Angle	72.5deg	72.5deg	73deg	73deg
Seat Tube Angle	78deg	78deg	78deg	78deg
Head Tube Length	80mm	80mm	100mm	120mm
Bottom Bracket Drop	68mm	68mm	68mm	68mm
Bottom Bracket Height	266mm	266mm	266mm	266mm
Chainstay Length	400mm	400mm	400mm	400mm
Chainstay Length Horizontal	394.2mm	394.2mm	394.2mm	394.2mm
Front-Center	583.1mm	589.2mm	605.7mm	627.1mm
Front-Center Horizontal	579.1mm	585.3mm	601.9mm	623.4mm
Wheelbase	973.3mm	979.5mm	996mm	1017.5mm
Fork Offset/Rake	43mm	43mm	43mm	43mm
Trail	60.2mm mid/neutral	60.2mm mid/neutral	57.2mm mid/neutral	57.2mm mid/neutral
Mechanical Trail	57.4mm	57.4mm	54.7mm	54.7mm
Wheel Flop	17.3mm	17.3mm	16mm	16mm
Tire to Pedal Spindle	79.1mm 170 mm cranks	82.7mm 172.5 mm cranks	96.7mm 175 mm cranks	118.1mm 175 mm cranks
Pedal Spindle to Ground Clearance	96mm 170 mm cranks	93.5mm 172.5 mm cranks	91mm 175 mm cranks	91mm 175 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.wiggle.co.uk/boardman-air-tt-90

Geometry