Good to know: Configurable build
Configurable build (at least partly: the cockpit or bar width, for example). The stock build below is only one of the options.
Geometry ?
RB RX 2025 geometry in sizes S–2XL: stack 538–636 mm, reach 396–436 mm, head angle 69–70°.
| S | M | L | XL | 2XL | |
|---|---|---|---|---|---|
| Stack | 538 mm | 561 mm | 578 mm | 601 mm | 636 mm |
| Reach | 396 mm | 404 mm | 424 mm | 426 mm | 436 mm |
| Head angle | 69° | 69° | 69.5° | 69.5° | 70° |
| Seat angle | 75° | 74° | 74° | 73° | 73° |
| Seat tube (c-t) | 430 mm | 470 mm | 500 mm | 530 mm | 560 mm |
| Head tube | 110 mm | 135 mm | 150 mm | 175 mm | 210 mm |
| Top tube (effective) | 540 mm | 565 mm | 590 mm | 610 mm | 630 mm |
| BB drop | 80 mm | 80 mm | 80 mm | 80 mm | 80 mm |
| Chainstay | 433 mm | 433 mm | 433 mm | 433 mm | 433 mm |
| Wheelbase | 1050 mm | 1068 mm | 1089 mm | 1100 mm | 1115 mm |
| Standover | 736 mm | 766 mm | 789 mm | 814 mm | 846 mm |
Source: rb-bike.cz, checked 2 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 S (stack 538 / reach 396 mm).
Stack and reach within 12 mm of size M (stack 561 / reach 404 mm).
Stack and reach within 12 mm of size L (stack 578 / reach 424 mm).
Stack and reach within 12 mm of size XL (stack 601 / reach 426 mm).
Stack and reach within 12 mm of size 2XL (stack 636 / reach 436 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