2020 BTR Fabrications Roamer Base
- Category
- Rigid Fatbike
- Design
- Flat Bar, Hardtail (Front suspension)
- Frame
- Steel
- Suspension
- 100mm fork travel
- Features
- Disc brake
Somewhat upright stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Somewhat upright stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Somewhat upright stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry |
Geometry
Small | Medium | Large | Extra Large | XX Large | |
Stack | 638.7mm | 645.1mm | 645.1mm | 647.4mm | 656.5mm |
Reach | 420mm | 440mm | 460mm | 480mm | 500mm |
Stack to Reach Ratio | 1.52:1 | 1.47:1 | 1.4:1 | 1.35:1 | 1.31:1 |
Seat Tube Length, C-T | 400mm | 420mm | 440mm | 455mm | 455mm |
Top Tube Length, Effective/Horizontal HT Top | 591.2mm | 612.9mm | 638.9mm | 665.6mm | 688.2mm |
Head Tube Angle | 66deg | 65.5deg | 65.5deg | 65deg | 65deg |
Effective Seat Tube Angle, ETT HT Top | 75deg | 75deg | 74.5deg | 74deg | 74deg |
Seat Tube Exit Angle | 73.7deg | 73.71deg | 73.22deg | 72.72deg | 72.74deg |
Head Tube Length | 120mm | 130mm | 130mm | 140mm | 150mm |
Bottom Bracket Drop | 70.3mm | 70.3mm | 70.3mm | 66.3mm | 66.3mm |
Bottom Bracket Height | 326.1mm | 326.1mm | 326.1mm | 330.1mm | 330.1mm |
Chainstay Length | 435mm | 435mm | 435mm | 435mm | 435mm |
Chainstay Length Horizontal | 429.3mm | 429.3mm | 429.3mm | 429.9mm | 429.9mm |
Front-Center | 738mm | 767mm | 786.9mm | 815mm | 839.2mm |
Front-Center Horizontal | 734.7mm | 763.7mm | 783.7mm | 812.3mm | 836.6mm |
Wheelbase | 1163.9mm | 1193mm | 1213mm | 1242.3mm | 1266.5mm |
Fork Offset/Rake | 51mm | 51mm | 51mm | 51mm | 55.6mm |
Fork Length (Axle-To-Crown) | 511mm | 511mm | 511mm | 511mm | 511mm |
Trail | 120.6mm very high | 124.6mm very high | 124.6mm very high | 128.5mm very high | 123.5mm very high |
Mechanical Trail | 110.2mm | 113.4mm | 113.4mm | 116.5mm | 111.9mm |
Wheel Flop | 44.8mm | 47mm | 47mm | 49.2mm | 47.3mm |
Tire to Pedal Spindle | 171.7mm 170 mm cranks | 200.6mm 170 mm cranks | 220.5mm 170 mm cranks | 248.7mm 170 mm cranks | 272.8mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 156.1mm 170 mm cranks | 156.1mm 170 mm cranks | 156.1mm 170 mm cranks | 160.1mm 170 mm cranks | 160.1mm 170 mm cranks |
Base Build
Small | Medium | Large | Extra Large | XX Large | |
Wheel Size | 26 in 559 mm BSD | 26 in 559 mm BSD | 26 in 559 mm BSD | 26 in 559 mm BSD | 26 in 559 mm BSD |
Tire Width | 4.6in | 4.6in | 4.6in | 4.6in | 4.6in |
Tire Width Max | 4.8in | 4.8in | 4.8in | 4.8in | 4.8in |
Tire Outer Diameter | 792.7mm | 792.7mm | 792.7mm | 792.7mm | 792.7mm |
Bike Length with Tires | 1956.6mm | 1985.7mm | 2005.7mm | 2034.9mm | 2059.2mm |
Published Sizing Recommendations
Height | 164 cm to 174 cm | 170 cm to 180 cm | 176 cm to 186 cm | 182 cm to 192 cm | 188 cm to 198 cm |
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://www.btr-fabrications.com/products/roamer-frame/#frame-options