Geometry ?
Hongfu FM238 2026 geometry in sizes XS–XL: stack 547–611 mm, reach 344–386 mm, head angle 71–73°.
| XS | S | M | L | XL | |
|---|---|---|---|---|---|
| Stack | 547 mm | 548 mm | 568 mm | 590 mm | 611 mm |
| Reach | 344 mm | 369 mm | 375 mm | 378 mm | 386 mm |
| Head angle | 71.5° | 71° | 72° | 73° | 73° |
| Seat angle | 73.5° | 73.5° | 73.5° | 73.5° | 73.5° |
| Seat tube (?) | 490 mm | 497 mm | 516 mm | 537 mm | 558 mm |
| Head tube | 125 mm | 128 mm | 145 mm | 164 mm | 186 mm |
| Top tube (effective) | 505 mm | 533 mm | 543 mm | 553 mm | 567 mm |
| BB drop | 73 mm | 73 mm | 73 mm | 73 mm | 73 mm |
| Chainstay | 415 mm | 415 mm | 415 mm | 415 mm | 415 mm |
| Wheelbase | 958 mm | 989 mm | 992 mm | 992 mm | 1006 mm |
| Fork length | 390 mm | 390 mm | 390 mm | 390 mm | 390 mm |
| Fork offset | 45 mm | 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 344 mm).
Stack and reach within 12 mm of size S (stack 548 / reach 369 mm).
Stack and reach within 12 mm of size M (stack 568 / reach 375 mm).
Stack and reach within 12 mm of size L (stack 590 / reach 378 mm).
Stack and reach within 12 mm of size XL (stack 611 / reach 386 mm).
Spotted a mistake or a missing build? Let me know.
Are you the manufacturer, or do you sell this bike? I’m missing 7 values for this model’s stem and bars. Add them