Geometry ?
Dengfu R20 2026 geometry in sizes 47/XS–57/L: stack 535–598.5 mm, reach 366–395 mm, head angle 70–71.8°.
| 47/XS | 51/S | 54/M | 57/L | |
|---|---|---|---|---|
| Stack | 535 mm | 551 mm | 573 mm | 598.5 mm |
| Reach | 366 mm | 373 mm | 382 mm | 395 mm |
| Head angle | 70° | 70.5° | 71.2° | 71.8° |
| Seat angle | 74.5° | 74° | 73.5° | 73.5° |
| Seat tube (?) | 450 mm | 470 mm | 490 mm | 520 mm |
| Head tube | 105 mm | 120 mm | 140 mm | 165 mm |
| Top tube (effective) | 514 mm | 531 mm | 552 mm | 572 mm |
| BB drop | 80 mm | 80 mm | 80 mm | 80 mm |
| Chainstay | 436 mm | 436 mm | 436 mm | 436 mm |
| Wheelbase | 1018.5 mm | 1027 mm | 1036 mm | 1052.5 mm |
| Fork length | 399 mm | 399 mm | 399 mm | 399 mm |
| Fork offset | 55 mm | 55 mm | 55 mm | 55 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: dengfubikes.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 47/XS (stack 535 / reach 366 mm).
Stack and reach within 12 mm of size 51/S (stack 551 / reach 373 mm).
Stack and reach within 12 mm of size 54/M (stack 573 / reach 382 mm).
Stack and reach within 12 mm of size 57/L (stack 598.5 / reach 395 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