2022 Serk Titanium A21 650b wheels

Design
Drop Bar, Rigid, non-suspension corrected
Frame
Titanium
Fork
Carbon/Composite
Features
Disc brake
Somewhat upright stack and reachvs category
Average stack and reachvs category
Average stack and reachvs category
Average stack and reachvs category

Geometry

S
M
L
XL
Stack
548mm
575mm
597mm
619mm
Reach
364mm
377mm
390mm
403mm
Stack to Reach Ratio
1.51:1
1.53:1
1.53:1
1.54:1
Seat Tube Length, C-T
485mm
510mm
535mm
560mm
Top Tube Length, Effective/Horizontal HT Top
523mm
549mm
569mm
594mm
Top Tube Slope
9.3deg
9.4deg
8.8deg
8.4deg
Head Tube Angle
70deg
70deg
70deg
70deg
Seat Tube Angle
74deg
73.5deg
73.5deg
73deg
Head Tube Length
110mm
139mm
164mm
188mm
Bottom Bracket Drop
75mm
75mm
73mm
73mm
Bottom Bracket Height
264mm
264mm
266mm
266mm
Chainstay Length
430mm
430mm
430mm
430mm
Chainstay Length Horizontal
423.4mm
423.4mm
423.8mm
423.8mm
Front-Center
589mm
612mm
633mm
654mm
Front-Center Horizontal
584.6mm
606.6mm
628.2mm
649.2mm
Wheelbase
1008mm
1030mm
1052mm
1073mm
Fork Offset/Rake
45mm
45mm
45mm
45mm
Trail
75.5mm
high
75.5mm
high
75.5mm
high
75.5mm
high
Mechanical Trail
70.9mm
70.9mm
70.9mm
70.9mm
Wheel Flop
24.3mm
24.3mm
24.3mm
24.3mm
Tire to Pedal Spindle
80mm
170 mm cranks
103mm
170 mm cranks
124mm
170 mm cranks
145mm
170 mm cranks
Pedal Spindle to Ground Clearance
94mm
170 mm cranks
94mm
170 mm cranks
96mm
170 mm cranks
96mm
170 mm cranks

650b wheels Build

S
M
L
XL
Wheel Size
650B/27.5 in
584 mm BSD
650B/27.5 in
584 mm BSD
650B/27.5 in
584 mm BSD
650B/27.5 in
584 mm BSD
Tire Width
47mm
47mm
47mm
47mm
Tire Width Max
55mm
55mm
55mm
55mm
Tire Outer Diameter
678mm
678mm
678mm
678mm
Bike Length with Tires
1686mm
1708mm
1730mm
1751mm

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
All-road/Gravel
Source:https://www.serk.cc/a21/