2025 Thomson Bike Products Tomahawk Base

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

Geometry

XS
S
M
L
XL
Stack
539mm
553mm
570mm
593mm
617mm
Reach
374mm
374mm
383mm
398mm
408mm
Stack to Reach Ratio
1.44:1
1.48:1
1.49:1
1.49:1
1.51:1
Seat Tube Length, Unknown
475mm
490mm
490mm
530mm
530mm
Seat Tube Length, Effective Unknown
530mm
535mm
548mm
570mm
587mm
Top Tube Slope
9.3deg
9.2deg
10.8deg
8.7deg
11deg
Head Tube Angle
70deg
70deg
70deg
70deg
70deg
Seat Tube Angle
74deg
74deg
74deg
74deg
74deg
Head Tube Length
105mm
120mm
135mm
160mm
185mm
Bottom Bracket Drop
80mm
80mm
80mm
80mm
80mm
Bottom Bracket Height
273mm
273mm
273mm
273mm
273mm
Chainstay Length
435mm
435mm
435mm
435mm
435mm
Chainstay Length Horizontal
427.6mm
427.6mm
427.6mm
427.6mm
427.6mm
Front-Center
602mm
607mm
616mm
640mm
658mm
Front-Center Horizontal
596.4mm
601.4mm
610.4mm
635.4mm
653.4mm
Wheelbase
1024mm
1029mm
1038mm
1063mm
1081mm
Fork Offset/Rake
52mm
52mm
47mm
47mm
47mm
Fork Length (Axle-To-Crown)
392mm
392mm
392mm
392mm
392mm
Trail
73.1mm
high
73.1mm
high
78.5mm
high
78.5mm
high
78.5mm
high
Mechanical Trail
68.7mm
68.7mm
73.7mm
73.7mm
73.7mm
Wheel Flop
23.5mm
23.5mm
25.2mm
25.2mm
25.2mm
Standover Height
756mm
770mm
778mm
809mm
821mm
Tire to Pedal Spindle
79mm
170 mm cranks
84mm
170 mm cranks
93mm
170 mm cranks
117mm
170 mm cranks
135mm
170 mm cranks
Pedal Spindle to Ground Clearance
103mm
170 mm cranks
103mm
170 mm cranks
103mm
170 mm cranks
103mm
170 mm cranks
103mm
170 mm cranks

Base Build

XS
S
M
L
XL
Wheel Size
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
Tire Width
42mm
42mm
42mm
42mm
42mm
Tire Width Max
47mm
47mm
47mm
47mm
47mm
Tire Outer Diameter
706mm
706mm
706mm
706mm
706mm
Bike Length with Tires
1730mm
1735mm
1744mm
1769mm
1787mm

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://bikethomson.com/product/the-tomahawk-frameset/