2019 Bearclaw Bicycle Co. Thunderhawk 650b Road+

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

Geometry

48
51
52.5
54
55.5
57
58.5
60
62
Stack
550.6mm
559.2mm
570.6mm
580mm
591.4mm
600.9mm
610.4mm
619.9mm
640.9mm
Reach
367.3mm
374.7mm
381.4mm
383.2mm
387.6mm
391.3mm
396.6mm
399.5mm
414.7mm
Stack to Reach Ratio
1.5:1
1.49:1
1.5:1
1.51:1
1.53:1
1.54:1
1.54:1
1.55:1
1.55:1
Seat Tube Length, Unknown
480mm
510mm
525mm
540mm
555mm
570mm
585mm
600mm
620mm
Top Tube Length, Effective/Horizontal Unknown
520mm
535mm
545mm
555mm
565mm
575mm
585mm
595mm
623mm
Top Tube Slope
10.1deg
7.7deg
7.2deg
6.7deg
6.3deg
5.8deg
5.3deg
4.8deg
4.8deg
Head Tube Angle
69.5deg
70.5deg
71deg
71deg
71.5deg
71.5deg
71.5deg
71.5deg
72.5deg
Seat Tube Angle
74deg
73.5deg
73.5deg
73deg
72.8deg
72.5deg
72.3deg
72deg
72deg
Head Tube Length
125mm
130mm
140mm
150mm
160mm
170mm
180mm
190mm
210mm
Bottom Bracket Drop
68mm
68mm
68mm
68mm
68mm
68mm
68mm
68mm
68mm
Bottom Bracket Height
277.3mm
277.3mm
277.3mm
277.3mm
277.3mm
277.3mm
277.3mm
277.3mm
277.3mm
Chainstay Length
428mm
428mm
428mm
428mm
428mm
428mm
428mm
428mm
428mm
Chainstay Length Horizontal
422.6mm
422.6mm
422.6mm
422.6mm
422.6mm
422.6mm
422.6mm
422.6mm
422.6mm
Front-Center
598.8mm
599.8mm
605.3mm
610.2mm
613.7mm
620.7mm
628.1mm
635.1mm
646.3mm
Front-Center Horizontal
594.9mm
595.9mm
601.4mm
606.4mm
609.9mm
616.9mm
624.4mm
631.4mm
642.7mm
Wheelbase
1017.5mm
1018.5mm
1024mm
1029mm
1032.5mm
1039.5mm
1047mm
1054mm
1065.3mm
Fork Offset/Rake
47mm
47mm
47mm
47mm
47mm
47mm
47mm
47mm
47mm
Fork Length, Unknown
405mm
405mm
405mm
405mm
405mm
405mm
405mm
405mm
405mm
Trail
78.9mm
high
72.4mm
high
69.2mm
high
69.2mm
high
66mm
high
66mm
high
66mm
high
66mm
high
59.6mm
mid/​neutral
Mechanical Trail
73.9mm
68.3mm
65.4mm
65.4mm
62.6mm
62.6mm
62.6mm
62.6mm
56.9mm
Wheel Flop
25.9mm
22.8mm
21.3mm
21.3mm
19.9mm
19.9mm
19.9mm
19.9mm
17.1mm
Tire to Pedal Spindle
83.5mm
170 mm cranks
84.5mm
170 mm cranks
87.4mm
172.5 mm cranks
92.4mm
172.5 mm cranks
95.9mm
172.5 mm cranks
100.3mm
175 mm cranks
107.8mm
175 mm cranks
114.8mm
175 mm cranks
126mm
175 mm cranks
Pedal Spindle to Ground Clearance
107.3mm
170 mm cranks
107.3mm
170 mm cranks
104.8mm
172.5 mm cranks
104.8mm
172.5 mm cranks
104.8mm
172.5 mm cranks
102.3mm
175 mm cranks
102.3mm
175 mm cranks
102.3mm
175 mm cranks
102.3mm
175 mm cranks

650b Road+ Build

48
51
52.5
54
55.5
57
58.5
60
62
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
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
650B/27.5 in
584 mm BSD
Tire Width
2.1in
2.1in
2.1in
2.1in
2.1in
2.1in
2.1in
2.1in
2.1in
Tire Width Max
2.35in
2.35in
2.35in
2.35in
2.35in
2.35in
2.35in
2.35in
2.35in
Tire Outer Diameter
690.7mm
690.7mm
690.7mm
690.7mm
690.7mm
690.7mm
690.7mm
690.7mm
690.7mm
Bike Length with Tires
1708.2mm
1709.2mm
1714.7mm
1719.7mm
1723.2mm
1730.2mm
1737.7mm
1744.7mm
1756mm
Crank Length
170mm
170mm
172.5mm
172.5mm
172.5mm
175mm
175mm
175mm
175mm
Handlebar Width
40cm
40cm
42cm
42cm
42cm
44cm
44cm
46cm
46cm
Stem Length
70mm
80mm
80mm
90mm
90mm
100mm
100mm
110mm
120mm
Stem Angle
10deg
10deg
10deg
10deg
10deg
10deg
10deg
10deg
10deg

Published Sizing Recommendations

Height
4 ft 11 in
to
5 ft 3 in
5 ft 3 in
to
5 ft 6 in
5 ft 5 in
to
5 ft 8 in
5 ft 7 in
to
5 ft 10 in
5 ft 9 in
to
6 ft 0 in
5 ft 11 in
to
6 ft 2 in
6 ft 1 in
to
6 ft 4 in
6 ft 3 in
to
6 ft 6 in
6 ft 5 in
to
6 ft 8 in

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://bearclawbicycleco.com/thunderhawk-titanium-650b-gravel-bike/