Geometry ?
Brother Kepler 2026 geometry in sizes 50–60: stack 530–598 mm, reach 372–401 mm, head angle 71–72°.
| 50 | 52 | 54 | 56 | 58 | 60 | |
|---|---|---|---|---|---|---|
| Stack | 530 mm | 530 mm | 543 mm | 562 mm | 580 mm | 598 mm |
| Reach | 372 mm | 378 mm | 384 mm | 387 mm | 392 mm | 401 mm |
| Head angle | 71° | 71° | 71.5° | 72° | 72° | 72° |
| Seat angle | 74.5° | 74° | 73.5° | 73° | 72.5° | 72° |
| Seat tube (c-c) | 485 mm | 505 mm | 525 mm | 545 mm | 565 mm | 585 mm |
| Head tube | 95 mm | 95 mm | 105 mm | 124 mm | 142 mm | 161 mm |
| Top tube (effective) | 520 mm | 530 mm | 545 mm | 560 mm | 575 mm | 595 mm |
| BB drop | 70 mm | 70 mm | 70 mm | 70 mm | 70 mm | 70 mm |
| Chainstay | 430 mm | 430 mm | 430 mm | 435 mm | 435 mm | 435 mm |
| Wheelbase | 1009 mm | 1014 mm | 1014 mm | 1025 mm | 1035 mm | 1049 mm |
| Fork length | 400 mm | 400 mm | 400 mm | 400 mm | 400 mm | 400 mm |
| Fork offset | 50 mm | 50 mm | 45 mm | 45 mm | 45 mm | 45 mm |
Source: brothercycles.com, checked 7 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 50 (stack 530 / reach 372 mm).
Stack and reach within 12 mm of size 52 (stack 530 / reach 378 mm).
Stack and reach within 12 mm of size 54 (stack 543 / reach 384 mm).
Stack and reach within 12 mm of size 56 (stack 562 / reach 387 mm).
Stack and reach within 12 mm of size 58 (stack 580 / reach 392 mm).
Stack and reach within 12 mm of size 60 (stack 598 / reach 401 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