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Geometry

  S M L XL
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Reach 427 475 390 597
Stack 479 635 499 734
Top Tube (effective) 460 580 686 595
Seat Tube C-C 368 439 543 451
Head Angle 71 64 64 68
Seat Angle 65 76 60 66
Head Tube 79 94 115 131
Chainstay 358 351 419 385
Wheelbase 1364 1021 1101 1259
Front Centre 594 602 629 756
Standover 603 651 848 838
BB Drop 53 56 62 56
Fork Rake / Offset 49 44 51 44
Trail 96 110 122 111
Fork Length (A2C) 444 563 428 608
Wheel Size 32 32 24 26
Tyre Max Width 749 753 642 686
Seatpost Length 314 263 385 370
Max Post Insertion 82 80 121 117
Seatpost Offset 0 0 0 0
Handlebar Width 635 743 766 823
Stem Length 58 49 61 83
Stem Angle -4 -4 -4 -5
Front Travel 88 122 111 125
Rider Height <172 172-182 180-188 >188
Data Source BMC Fourstroke 01 THREE 2026 BMC Fourstroke 01 THREE 2026 BMC Fourstroke 01 THREE 2026 BMC Fourstroke 01 THREE 2026

Standard measurements are in millimeters and degrees. The site attempts to recognize and convert other units back to standard - results may vary.

Image showing geometry measurements

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