2022 Pipedream Cycles Sirius S5 100mm Fork

Design
Flat Bar, Hardtail (Front suspension)
Frame
Steel
Suspension
100mm fork travel, 20% sag
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
306.7mm
306.7mm
306.7mm
Chainstay Length
425mm
425mm
425mm
Chainstay Length Max
441mm
441mm
441mm
Chainstay Length Horizontal
420.2mm
420.2mm
420.2mm
Chainstay Length Horizontal Max
436.3mm
436.3mm
436.3mm
Front-Center
737.6mm
757.6mm
777.5mm
Front-Center Horizontal
734.9mm
754.9mm
774.9mm
Wheelbase
1155mm
1175mm
1195mm
Wheelbase Max
1171mm
1191mm
1211mm
Fork Offset/Rake
42.1mm
42.1mm
42.1mm
Fork Length (Axle-To-Crown)
484mm
484mm
484mm
Trail
126.4mm
very high
126.4mm
very high
126.4mm
very high
Mechanical Trail
114.6mm
114.6mm
114.6mm
Wheel Flop
48.4mm
48.4mm
48.4mm
Tire to Pedal Spindle
196.9mm
170 mm cranks
216.9mm
170 mm cranks
236.8mm
170 mm cranks
Pedal Spindle to Ground Clearance
136.7mm
170 mm cranks
136.7mm
170 mm cranks
136.7mm
170 mm cranks

100mm Fork Build

Longish
Long
Longer
Wheel Size
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
Tire Width
2.35in
2.35in
2.35in
Tire Outer Diameter
741.4mm
741.4mm
741.4mm
Bike Length with Tires
1896.4mm
1916.4mm
1936.4mm

Published Sizing Recommendations

Height
150 cm
to
173 cm
168 cm
to
180 cm
178 cm
to
193 cm

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/faq/