2026 Bearclaw Bicycle Co. TōWMAK Base
- Category
- Rigid Fatbike
- Design
- Drop Bar, Rigid, suspension corrected
- Frame
- Titanium
- Fork
- Titanium
- Features
- Rim brake
Geometry
51 | 52.5 | 54 | 55.5 | 57 | 58.5 | 60 | 62 | |
Stack | 591mm | 603mm | 615mm | 624mm | 633mm | 643mm | 652mm | 671mm |
Reach | 380mm | 381mm | 388mm | 395mm | 402mm | 410mm | 417mm | 432mm |
Stack to Reach Ratio | 1.56:1 | 1.58:1 | 1.59:1 | 1.58:1 | 1.57:1 | 1.57:1 | 1.56:1 | 1.55:1 |
Seat Tube Length, Unknown | 510mm | 525mm | 540mm | 555mm | 570mm | 585mm | 600mm | 620mm |
Top Tube Length, Actual C-C | 550mm | 560mm | 570mm | 580mm | 590mm | 600mm | 610mm | 631mm |
Top Tube Slope | 11deg | 10.6deg | 10.1deg | 9.4deg | 8.7deg | 8deg | 7.4deg | 7.1deg |
Head Tube Angle | 69deg | 69.5deg | 70deg | 70deg | 70deg | 70deg | 70deg | 70deg |
Seat Tube Angle | 74deg | 74deg | 74deg | 74deg | 74deg | 74deg | 74deg | 74deg |
Head Tube Length | 110mm | 120mm | 130mm | 140mm | 150mm | 160mm | 170mm | 190mm |
Bottom Bracket Drop | 70mm | 70mm | 70mm | 70mm | 70mm | 70mm | 70mm | 70mm |
Bottom Bracket Height | 323.6mm | 323.6mm | 323.6mm | 323.6mm | 323.6mm | 323.6mm | 323.6mm | 323.6mm |
Chainstay Length | 450mm | 450mm | 450mm | 450mm | 450mm | 450mm | 450mm | 450mm |
Chainstay Length Horizontal | 444.5mm | 444.5mm | 444.5mm | 444.5mm | 444.5mm | 444.5mm | 444.5mm | 444.5mm |
Front-Center | 639mm | 639mm | 644mm | 655mm | 665mm | 676mm | 687mm | 708mm |
Front-Center Horizontal | 624.5mm | 635.5mm | 635.5mm | 651.5mm | 661.5mm | 672.5mm | 683.5mm | 705.5mm |
Wheelbase | 1069mm | 1080mm | 1080mm | 1096mm | 1106mm | 1117mm | 1128mm | 1150mm |
Fork Offset/Rake | 51mm | 51mm | 51mm | 51mm | 51mm | 51mm | 51mm | 51mm |
Fork Length (On-Axis) | 468mm | 468mm | 468mm | 468mm | 468mm | 468mm | 468mm | 468mm |
Trail | 96.4mm very high | 92.7mm very high | 89mm very high | 89mm very high | 89mm very high | 89mm very high | 89mm very high | 89mm very high |
Mechanical Trail | 90mm | 86.8mm | 83.6mm | 83.6mm | 83.6mm | 83.6mm | 83.6mm | 83.6mm |
Wheel Flop | 32.3mm | 30.4mm | 28.6mm | 28.6mm | 28.6mm | 28.6mm | 28.6mm | 28.6mm |
Tire to Pedal Spindle | 75.5mm 170 mm cranks | 75.5mm 170 mm cranks | 80.5mm 170 mm cranks | 91.5mm 170 mm cranks | 101.5mm 170 mm cranks | 112.5mm 170 mm cranks | 123.5mm 170 mm cranks | 144.5mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 153.6mm 170 mm cranks | 153.6mm 170 mm cranks | 153.6mm 170 mm cranks | 153.6mm 170 mm cranks | 153.6mm 170 mm cranks | 153.6mm 170 mm cranks | 153.6mm 170 mm cranks | 153.6mm 170 mm cranks |
Base Build
51 | 52.5 | 54 | 55.5 | 57 | 58.5 | 60 | 62 | |
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 | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD |
Tire Width | 3.25in | 3.25in | 3.25in | 3.25in | 3.25in | 3.25in | 3.25in | 3.25in |
Tire Outer Diameter | 787.1mm | 787.1mm | 787.1mm | 787.1mm | 787.1mm | 787.1mm | 787.1mm | 787.1mm |
Bike Length with Tires | 1856.1mm | 1867.1mm | 1867.1mm | 1883.1mm | 1893.1mm | 1904.1mm | 1915.1mm | 1937.1mm |
Published Sizing Recommendations
Height | 5 ft 4 in to 5 ft 7 in | 5 ft 6 in to 5 ft 9 in | 5 ft 8 in to 5 ft 11 in | 5 ft 10 in to 6 ft 1 in | 6 ft 0 in to 6 ft 3 in | 6 ft 2 in to 6 ft 4 in | 6 ft 3 in to 6 ft 5 in | 6 ft 4 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 ScaleCategory Trend
Rigid FatbikeSource:bearclawbicycleco.com