Gravel
Brother Cycles Kepler
2026 · 700c wheels · 6 sizes
Double butted 4130 chromoly steel touring and gravel frameset with a lugged steel fork, flat mount disc brakes and a 12x142 mm thru-axle rear. It runs 700c or 650b wheels, with clearance for 700x45c or 650bx48c tyres, and has rack, mudguard and three bottle mounts plus triple cage mounts on each fork blade. Sold as a frameset only. Brother lists sizes by seat tube length (centre to top of top tube) and says the Kepler's geometry is unchanged from earlier versions.
Source: www.brothercycles.com/shop/frames/kepler/
I ride:
Size run
Published geometry by size. How each size rides and fits for your rider profile loads with the page.
| Size | 50 | 52 | 54 | 56 | 58 | 60 |
|---|---|---|---|---|---|---|
| Stack (mm) | 530 | 530 | 543 | 562 | 580 | 598 |
| Reach (mm) | 372 | 378 | 384 | 387 | 392 | 401 |
| Head angle (°) | 71.0 | 71.0 | 71.5 | 72.0 | 72.0 | 72.0 |
| Seat angle (°) | 74.5 | 74.0 | 73.5 | 73.0 | 72.5 | 72.0 |