2021 Pipedream Cycles Sirius S5 Base

	Longish	Long	Longer
Stack	586mm	586mm	586mm
Reach	445mm	465mm	485mm
Stack to Reach Ratio	1.32:1	1.26:1	1.21:1
Seat Tube Length, C-T	395mm	420mm	420mm
Top Tube Length, Effective/Horizontal Center	594mm	612mm	632mm
Top Tube Slope	20.7deg	17.6deg	17deg
Head Tube Angle	65deg	65deg	65deg
Seat Tube Angle	77.5deg	77.5deg	77.5deg
Head Tube Length	105mm	105mm	105mm
Bottom Bracket Drop	64mm	64mm	64mm
Bottom Bracket Height	305.4mm	305.4mm	305.4mm
Chainstay Length	425mm	425mm	425mm
Chainstay Length Horizontal	420.2mm	420.2mm	420.2mm
Front-Center	737.6mm	757.6mm	777.5mm
Front-Center Horizontal	734.9mm	754.9mm	774.9mm
Wheelbase	1155mm	1175mm	1195mm
Fork Offset/Rake	42.1mm	42.1mm	42.1mm
Fork Length (Axle-To-Crown)	485mm	485mm	485mm
Trail	125.8mm very high	125.8mm very high	125.8mm very high
Mechanical Trail	114mm	114mm	114mm
Wheel Flop	48.2mm	48.2mm	48.2mm
Tire to Pedal Spindle	198.2mm 170 mm cranks	218.1mm 170 mm cranks	238.1mm 170 mm cranks
Pedal Spindle to Ground Clearance	135.4mm 170 mm cranks	135.4mm 170 mm cranks	135.4mm 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.pipedreamcycles.com/shop/sirius/?v=79cba1185463

Geometry