2021 Bearclaw Bicycle Co. TōWMAK Base
- Category
- Rigid Fatbike
- Design
- Drop Bar, Rigid, non-suspension corrected
- Frame
- Titanium
- Fork
- Carbon/Composite
- Features
- Disc brake
Geometry
51 | 52.5 | 54 | 55.5 | 57 | 58.5 | 60 | 62 | |
Stack | 591.3mm | 602.9mm | 614.5mm | 623.9mm | 633.3mm | 642.7mm | 652.1mm | 670.9mm |
Reach | 380.4mm | 387.9mm | 388mm | 395.2mm | 402.4mm | 409.6mm | 416.8mm | 432mm |
Stack to Reach Ratio | 1.55:1 | 1.55:1 | 1.58:1 | 1.58:1 | 1.57:1 | 1.57:1 | 1.56:1 | 1.55:1 |
Seat Tube Length, C-T | 510mm | 525mm | 540mm | 555mm | 570mm | 585mm | 600mm | 620mm |
Top Tube Length, Actual C-C | 550mm | 560mm | 570mm | 580mm | 590mm | 600mm | 610mm | 630.7mm |
Top Tube Slope | 11deg | 10.5deg | 10.1deg | 9.4deg | 8.7deg | 8.1deg | 7.5deg | 7.2deg |
Head Tube Angle | 69deg | 69.5deg | 70deg | 70deg | 70deg | 70deg | 70deg | 70deg |
Seat Tube Angle | 74deg | 73.5deg | 73.5deg | 73.5deg | 73.5deg | 73.5deg | 73.5deg | 73.5deg |
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 | 336.3mm | 336.3mm | 336.3mm | 336.3mm | 336.3mm | 336.3mm | 336.3mm | 336.3mm |
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 | 628.7mm | 638.9mm | 639.2mm | 654.8mm | 665.4mm | 676mm | 686.6mm | 708.4mm |
Front-Center Horizontal | 624.8mm | 635.1mm | 635.4mm | 651.1mm | 661.7mm | 672.4mm | 683mm | 705mm |
Wheelbase | 1069.3mm | 1079.6mm | 1079.9mm | 1095.6mm | 1106.2mm | 1116.9mm | 1127.5mm | 1149.5mm |
Fork Offset/Rake | 51mm | 51mm | 51mm | 51mm | 51mm | 51mm | 51mm | 51mm |
Fork Length (On-Axis) | 468mm | 468mm | 468mm | 468mm | 468mm | 468mm | 468mm | 468mm |
Trail | 101.3mm very high | 97.5mm very high | 93.6mm very high | 93.6mm very high | 93.6mm very high | 93.6mm very high | 93.6mm very high | 93.6mm very high |
Mechanical Trail | 94.6mm | 91.3mm | 88mm | 88mm | 88mm | 88mm | 88mm | 88mm |
Wheel Flop | 33.9mm | 32mm | 30.1mm | 30.1mm | 30.1mm | 30.1mm | 30.1mm | 30.1mm |
Tire to Pedal Spindle | 52.4mm 170 mm cranks | 62.6mm 170 mm cranks | 62.9mm 170 mm cranks | 73.5mm 175 mm cranks | 84.1mm 175 mm cranks | 94.7mm 175 mm cranks | 105.3mm 175 mm cranks | 127.1mm 175 mm cranks |
Pedal Spindle to Ground Clearance | 166.3mm 170 mm cranks | 166.3mm 170 mm cranks | 166.3mm 170 mm cranks | 161.3mm 175 mm cranks | 161.3mm 175 mm cranks | 161.3mm 175 mm cranks | 161.3mm 175 mm cranks | 161.3mm 175 mm cranks |
Base Build
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 |
Tire Width | 4.5in | 4.5in | 4.5in | 4.5in | 4.5in | 4.5in | 4.5in | 4.5in |
Tire Outer Diameter | 812.6mm | 812.6mm | 812.6mm | 812.6mm | 812.6mm | 812.6mm | 812.6mm | 812.6mm |
Bike Length with Tires | 1881.9mm | 1892.2mm | 1892.5mm | 1908.2mm | 1918.8mm | 1929.5mm | 1940.1mm | 1962.1mm |
Crank Length | 170mm | 170mm | 170mm | 175mm | 175mm | 175mm | 175mm | 175mm |
Handlebar Width | 42cm | 42cm | 42cm | 44cm | 44cm | 44cm | 46cm | 46cm |
Stem Length | 60mm | 70mm | 70mm | 80mm | 80mm | 90mm | 90mm | 100mm |
Published Sizing Recommendations
Height | 5 ft 4 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 ScaleCategory Trend
Rigid FatbikeSource:https://bearclawbicycleco.com/towmak/