Balfa BB7 geometry data

All following data is according to the newest generation of the BB7 (2004/2005). Visit "Model history" page for details.

Balfa BB7 geometry chart

OFFICIAL GEOMETRY

Note fairly low fork length (old Rock Shox Boxxer, Manitou Dorado). All sizes will slightly differ with higher forks. Some heights for comparison (also refer to "Verified geometry" below):

  • Rock Shox Boxxer (200 mm travel) - 568 mm - 22.4"
  • Marzocchi 888 2006 (200 mm travel) - 583 mm - 22.9"
Imperial dimensions (inches) SIZE
Small Regular Large
A Seat Tube length 15.1 16.3 17.0
B Top Tube length 21.5 22.7 24.0
C Head Tube Angle 66°
D Seat Tube Angle 63°
E Chainstay Length 16.9
F Wheelbase 44.0 45.0 46.0
G Bottom Bracket Height 14.5
H Standover Height 27.2 27.6 28.2
I Head Tube Height 4.6
J Fork length 21.4

Metric dimensions (mm) SIZE
Small Regular Large
A Seat Tube length 384 414 432
B Top Tube length 545 576 311
C Head Tube Angle 66°
D Seat Tube Angle 63°
E Chainstay Length 431
F Wheelbase 1115 1141 1175
G Bottom Bracket Height 369
H Standover Height 691 703 717
I Head Tube Height 118
J Fork length 543

 

VERIFIED GEOMETRY

These dimensions were measured on my BB7 with following parameters:

  • 2004 model
  • Regular size
  • Shock mounted in slack (DH) position (upper mount)
  • Fork length: 573 mm - 22.6" (2005 888 with flat crowns)
  • Maxxis Minion DHF 2.5" tires (height: 53 mm - 2.1")
  Imperial (inches) Metric (mm)
A Seat Tube length 16.6 422
B Top Tube length* 23 585
C Head Tube Angle 64.5° (± 0.2°)
D Seat Tube Angle 61.7° (± 0.2°)
E Chainstay Length 16.9 430
F Wheelbase 45.2 1149
G Bottom Bracket Height 15 380
H Standover Height 28.1 715
I Head Tube Height 4.6 118
J Fork length 22.6 573

* measured horizontally to the center of seatpost - mind the slack seat tube angle.

REACH AND STACK

What is "reach and stack" measurement? Read at SickLines.com.

For my bike (as above) these dimensions are approximately:

  • Reach: 365 mm - 14.8"
  • Stack: 565 mm - 22.2"