2015 Isaac · RD
2015 Isaac Boson Disc geometry
Full frame geometry for the 2015 Isaac Boson Disc, size by size — stack, reach, angles and tube lengths.
Does this bike fit you?
Get sized in minutes — no tape measure, no appointment.
Geometry by size
| Size | Stack (mm) | Reach (mm) | Seat angle (°) | Head angle (°) | Head tube (mm) | Top tube (mm) | Seat tube (mm) | Standover (mm) | BB drop (mm) | Front centre (mm) | Chainstay (mm) | Wheelbase (mm) | Fork rake (mm) | Trail (mm) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 49 | 539 | 363 | 75 | 71 | 124 | 507 | 480 | 732 | 70 | 568 | 406 | 977 | 45 | 67 |
| 52 | 565 | 383 | 74 | 73 | 164 | 545 | 515 | 764 | 70 | 583 | 406 | 988 | 45 | 55 |
| 55 | 577 | 393 | 74 | 73 | 177 | 558 | 550 | 798 | 70 | 596 | 406 | 1004 | 45 | 55 |
| 58 | 591 | 395 | 73.5 | 73.5 | 189 | 570 | 565 | 811 | 70 | 598 | 406 | 1003 | 45 | 52 |
| 61 | 614 | 413 | 73.5 | 73.5 | 214 | 595 | 587 | 832 | 70 | 623 | 406 | 1028 | 45 | 52 |
All measurements in millimetres unless marked (°) for angles.