6 INTUITIVE dimensions FULLY describe your geometry!
All BENCHMARK fixtures are setup using the same 6 INTUITIVE dimensions, which trace back to common geometry tables:
The tables below record the travel limits of each fixture according to the dimensions described above and in the photo below. Although CAD is NOT required to setup the fixture, a BikeCAD tutorial video is also linked below to help extract the 6 INTUITIVE dimensions from the BikeCAD software. Additionally, there are subtle differences in setting up the fixtures, which are described in more detail below.
- Head tube angle (measured in degrees)
- Seat tube angle (measured in degrees)
- Head tube bottom center X (measured horizontally in millimeters and similar to reach)
- Head tube bottom center Y (measured vertically in millimeters and similar to stack)
- Chainstay length (measured horizontally along the ground in millimeters)
- Bottom bracket drop (measured in millimeters)
The tables below record the travel limits of each fixture according to the dimensions described above and in the photo below. Although CAD is NOT required to setup the fixture, a BikeCAD tutorial video is also linked below to help extract the 6 INTUITIVE dimensions from the BikeCAD software. Additionally, there are subtle differences in setting up the fixtures, which are described in more detail below.
BENCHMARK fixture travel limits
BENCHMARK PRO TRAVEL LIMITS
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BENCHMARK 1.1 TRAVEL LIMITS
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How to Export dimensions from BikeCAD
BENCHMARK 1.1
The linear scales are in millimeters and are read from the edge of the sliding gantry plates for head tube bottom center X, head tube bottom center Y, and chainstay length. The bottom bracket drop scale in indicated by a stainless steel pointer. Head tube angle and seat tube angle are set INDEPENDENTLY of the distances for easy adjustment. A digital angle finder (sold separately), allows quick and accurate setting of the seat tube and head tube angle WITHOUT needing to adjust the previously set distances.
Head tube cones allow the Benchmark frame fixture to be quickly setup for various head tube diameters. Just make sure the bottom of your head tube aligns with the Benchmark concentric pivot indicator. A small notch is engraved to denote the alignment location as shown in the figure below.
Since December of 2022 all Benchmark 1.1s ship standard with a CNC machined bottom bracket post with 1mm engraved scale graduations. Also included are BSA and T47 Pucks. Two threaded pucks are used as a jam nut and are aligned to the scale. The scale is read from the edge of the puck closest to the spine of the fixture.
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Legacy Benchmark 1.1s have a threaded rod bottom bracket post that is set using calipers and distances provided in the manual. The legacy V1.1 is field upgradeable to the CNC machined bottom bracket post version. The upgrade kit can be found on our store here:
BENCHMARK PRO
The linear scales are in millimeters and are read from the included scale indicators for head tube bottom center X, head tube bottom center Y, chainstay length, and bottom bracket drop. Head tube angle and seat tube angle are set INDEPENDENTLY of the distances for easy adjustment. A digital angle finder (sold separately), allows quick and accurate setting of the seat tube and head tube angle WITHOUT needing to adjust the previously set distances.
Interchangeable head tube pucks allow a single part replacement without recalibration to change between smaller and larger head tubes effortlessly. An engraved scale on the bottom bracket post allows a direct readout of the where the pucks should be for each standard shell width size with 1mm graduations for off standard widths. Simply line up the puck at the desired value and lock down using the retaining puck.
Interchangeable head tube pucks allow a single part replacement without recalibration to change between smaller and larger head tubes effortlessly. An engraved scale on the bottom bracket post allows a direct readout of the where the pucks should be for each standard shell width size with 1mm graduations for off standard widths. Simply line up the puck at the desired value and lock down using the retaining puck.
