2017 HongFu Bikes FM258 Base 21
Build
700C/29 in × 2.25 in
Insights
Somewhat aggressive stack and reach vs trend of full-suspension cross-country mtb bikes
Design deviates from other sizes of HongFu Bikes FM258
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 602.8mm |
| Reach | 488.2mm |
| Stack to Reach Ratio | 1.23:1 |
| Seat Tube Length, C-T | 520mm |
| Top Tube Length, Effective/Horizontal HT Top | 661mm |
| Head Tube Angle | 69deg |
| Effective Seat Tube Angle, ETT HT Top | 74deg |
| Head Tube Length | 115mm |
| Bottom Bracket Drop | 50.9mm |
| Bottom Bracket Height | 317.3mm |
| Chainstay Length | 435mm |
| Chainstay Length Horizontal | 432mm |
| Front-Center | 756.5mm |
| Front-Center Horizontal | 754.8mm |
| Wheelbase | 1186.8mm |
| Fork Offset/Rake | 51mm |
| Fork Length (Axle-To-Crown) | 500mm |
| Trail | 86.7mm very high |
| Mechanical Trail | 80.9mm |
| Wheel Flop | 29mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 218.4mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 147.3mm |
Base Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 2.25in |
| Tire Outer Diameter | 736.3mm |
| Bike Length with Tires | 1923.1mm |
| Suspension Type | Full suspension |
| Bar Type | Flat Bar |
| Fork Travel | 100mm |
| Rear Travel | 100mm |
| Suspension Sag | Unknown |
| Frame Material | Carbon/Composite |
| Fork Material | Unknown |
| Brake Type | Unknown |
Source:http://www.hongfu-bikes.com/html_Products/Mountain_Frame/29ER_Mountain_Frame/2017/0622/482.html