Geometry ?
Hongfu FM279 2018 geometry in sizes 500–600: stack 518.2–604.4 mm, reach 375–398 mm, head angle 70.5–72°.
| 500 | 520 | 540 | 560 | 580 | 600 | |
|---|---|---|---|---|---|---|
| Stack | 518.2 mm | 529.5 mm | 554 mm | 566.4 mm | 580.6 mm | 604.4 mm |
| Reach | 375 mm | 380 mm | 382 mm | 386 mm | 391 mm | 398 mm |
| Head angle | 70.5° | 71° | 71.5° | 72° | 72° | 72° |
| Seat angle | 75.5° | 74.5° | 74° | 73° | 73° | 73° |
| Head tube | 100 mm | 110 mm | 135 mm | 145 mm | 160 mm | 185 mm |
| Top tube (effective) | 509 mm | 527 mm | 541 mm | 559 mm | 568.5 mm | 582.2 mm |
| BB drop | 61 mm | 61 mm | 61 mm | 61 mm | 61 mm | 61 mm |
| Chainstay | 425 mm | 425 mm | 425 mm | 425 mm | 425 mm | 425 mm |
| Wheelbase | 1005.2 mm | 1009.5 mm | 1020 mm | 1018.1 mm | 1027.6 mm | 1042.5 mm |
| Fork length | 400 mm | 400 mm | 400 mm | 400 mm | 400 mm | 400 mm |
| Fork offset | 45 mm | 45 mm | 45 mm | 45 mm | 45 mm | 45 mm |
Source: hongfu-bikes.com, checked 13 Nov 2026 · bar position: worked out from published data
Stock build
I don’t have the build for each size yet.
Frames with similar geometry
Stack and reach within 12 mm of size 500 (stack 518.2 / reach 375 mm).
Stack and reach within 12 mm of size 520 (stack 529.5 / reach 380 mm).
Stack and reach within 12 mm of size 540 (stack 554 / reach 382 mm).
Stack and reach within 12 mm of size 560 (stack 566.4 / reach 386 mm).
Stack and reach within 12 mm of size 580 (stack 580.6 / reach 391 mm).
Stack and reach within 12 mm of size 600 (stack 604.4 / reach 398 mm).
Spotted a mistake or a missing build? Let me know.
Are you the manufacturer, or do you sell this bike? I’m missing 8 values for this model’s stem and bars. Add them