2013 Ridley Bikes Helium SL Base

	XS	S	M	L	XL
Stack	530mm	545mm	575mm	602mm	625mm
Reach	375mm	385mm	390mm	400mm	405mm
Stack to Reach Ratio	1.41:1	1.42:1	1.47:1	1.51:1	1.54:1
Seat Tube Length, C-T	480mm	510mm	540mm	570mm	600mm
Seat Tube Length, C-C	440mm	470mm	500mm	530mm	560mm
Top Tube Length, Unknown	525mm	545mm	565mm	585mm	600mm
Top Tube Slope	7.7deg	6deg	6.1deg	5.8deg	5.2deg
Head Tube Angle	72deg	73deg	73.5deg	73.5deg	74deg
Seat Tube Angle	74deg	73.5deg	73deg	72.5deg	72.5deg
Head Tube Length	130mm	145mm	175mm	205mm	230mm
Bottom Bracket Drop	68mm	66mm	66mm	63mm	63mm
Bottom Bracket Height	271mm	273mm	273mm	276mm	276mm
Chainstay Length	405mm	405mm	405mm	408mm	408mm
Chainstay Length Horizontal	399.3mm	399.6mm	399.6mm	403.1mm	403.1mm
Front-Center	578.8mm	581.2mm	594.1mm	603.2mm	612.1mm
Front-Center Horizontal	574.8mm	577.4mm	590.4mm	599.9mm	608.9mm
Wheelbase	974mm	977mm	990mm	1003mm	1012mm
Fork Offset/Rake	47.2mm	44mm	47.6mm	38.6mm	41.1mm
Trail	60.5mm mid/neutral	57.7mm mid/neutral	50.8mm mid/neutral	60.2mm mid/neutral	54.5mm mid/neutral
Mechanical Trail	57.6mm	55.2mm	48.7mm	57.7mm	52.4mm
Wheel Flop	17.8mm	16.1mm	13.8mm	16.4mm	14.4mm
Standover Height	740mm	750mm	780mm	810mm	840mm
Tire to Pedal Spindle	69.8mm 170 mm cranks	72.2mm 170 mm cranks	85.1mm 170 mm cranks	94.2mm 170 mm cranks	103.1mm 170 mm cranks
Pedal Spindle to Ground Clearance	101mm 170 mm cranks	103mm 170 mm cranks	103mm 170 mm cranks	106mm 170 mm cranks	106mm 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.competitivecyclist.com/ridley-helium-sl-10-road-bike-frameset-2016#pdp-tab-geometry-chart

Geometry