2021 Pipedream Cycles Sirius S5 Base

Design
Flat Bar, Hardtail (Front suspension)
Frame
Steel
Suspension
120mm fork travel
Features
Disc brake, Single-speed capable
Very aggressive stack and reachvs category
Very aggressive stack and reachvs category
Very aggressive stack and reachvs category

Geometry

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

Base Build

Longish
Long
Longer
Wheel Size
700C/29"
622 mm BSD
700C/29"
622 mm BSD
700C/29"
622 mm BSD
Tire Width
2.3in
2.3in
2.3in
Tire Outer Diameter
738.8mm
738.8mm
738.8mm
Bike Length with Tires
1893.8mm
1913.8mm
1933.8mm

Stack and Reach vs. Category Trend

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.

Learn more about the Upright/Aggressive Scale
Category Trend
Hardtail Trail MTB
Source:https://www.pipedreamcycles.com/shop/sirius/?v=79cba1185463