Geometry ?
Hongfu FM188 Internal 2026 geometry in sizes XS–L: stack 547–601.6 mm, reach 369–391.8 mm, head angle 71°.
| XS | S | M | L | |
|---|---|---|---|---|
| Stack | 547 mm | 562.1 mm | 576.9 mm | 601.6 mm |
| Reach | 369 mm | 376.5 mm | 384 mm | 391.8 mm |
| Head angle | 71° | 71° | 71° | 71° |
| Seat angle | 73.5° | 73.5° | 73.5° | 73.5° |
| Seat tube (?) | 460 mm | 510 mm | 554 mm | 590 mm |
| Head tube | 122 mm | 138 mm | 156 mm | 182 mm |
| Top tube (effective) | 531 mm | 543 mm | 555 mm | 570 mm |
| BB drop | 70 mm | 70 mm | 68 mm | 68 mm |
| Chainstay | 430 mm | 430 mm | 430 mm | 430 mm |
| Wheelbase | 1009.9 mm | 1022.8 mm | 1036.5 mm | 1053.1 mm |
| Fork length | 400 mm | 400 mm | 400 mm | 400 mm |
| Fork offset | 45 mm | 45 mm | 45 mm | 45 mm |
(?) by the seat tube length: the manufacturer doesn’t say whether it’s measured centre to centre (c-c) or centre to top (c-t).
Source: hongfu-bikes.com, checked 12 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 XS (stack 547 / reach 369 mm).
Stack and reach within 12 mm of size S (stack 562.1 / reach 376.5 mm).
Stack and reach within 12 mm of size M (stack 576.9 / reach 384 mm).
Stack and reach within 12 mm of size L (stack 601.6 / reach 391.8 mm).
Spotted a mistake or a missing build? Let me know.
Are you the manufacturer, or do you sell this bike? I’m missing 6 values for this model’s stem and bars. Add them