2021 Jamis Bicycles Beatnik Base 48
Build
700C/29 in × 32 mm
Insights
Somewhat upright stack and reach vs trend of track/fixed-gear bikes
Design deviates from other sizes of Jamis Bicycles Beatnik
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 527mm |
| Reach | 389mm |
| Stack to Reach Ratio | 1.35:1 |
| Seat Tube Length, Unknown | 480mm |
| Top Tube Length, Effective/Horizontal Center | 525mm |
| Top Tube Slope | 7deg |
| Head Tube Angle | 71.5deg |
| Seat Tube Angle | 75.5deg |
| Head Tube Length | 95mm |
| Bottom Bracket Drop | 65mm |
| Bottom Bracket Height | 278mm |
| Chainstay Length | 421mm |
| Chainstay Length Horizontal | 416mm |
| Front-Center | 592.6mm |
| Front-Center Horizontal | 589.1mm |
| Wheelbase | 1005mm |
| Fork Offset/Rake | 45mm |
| Trail | 67.3mm high |
| Mechanical Trail | 63.8mm |
| Wheel Flop | 20.3mm |
| Standover Height | 774mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 79.6mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 108mm |
Base Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 32mm |
| Tire Outer Diameter | 686mm |
| Bike Length with Tires | 1691mm |
| Crank Length | 170mm |
| Handlebar Width | 540mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Flat Bar |
| Frame Material | Steel |
| Fork Material | Steel |
| Brake Type | Rim |
| Features | Single-speed capable |
Source:https://www.jamisbikes.com/new_pdf/21_beatnik.pdf