Brompton FrameRack

Description

The FrameRack is my version of the alternative rack solution for the Brompton.

Features:

• 200mm x 100mm x 9mm. Long enough for use as a stable platform but still short enough for room to lift the bike by the top tube.
• Weight: ~90g
• The standard colour is Black or Translucent Blue
• Standard material is PETG.
• Two black mounting straps included. Same as the ones pictured except slightly longer (you can cut them a bit shorter for a cleaner install).

Customization options (for an additional fee):

• Colour. A translucent red would look great on a red lacquer Brompton! Note that some colours are only available in some types of material, see below.
• Material. There is a choice between PETG and PLA. PLA has many more options for colour and finish (ie. matte vs glossy). PETG only comes in glossy but has a translucent option. PLA is less heat and UV resistant. If you do not leave the FrameRack exposed to light or high heat (ie. 40°C) PLA is ok. Given the same colour option, I would recommend PETG but if you must have a certain colour that is only available in PLA then PLA is ok as well especially in less demanding applications.
• Dimensions. I can modify the length and width.
• Etching, names, etc. The surface can be modified to include writing or design subject to certain printing constraints.

Inspired by Eerder Metaal’s “Framehugger” and the VeloSolo (now distributed by Bikegang) “Platform B”. The Framehugger and Platform B have the advantage of the metal U bolt mounting method which allows a much tighter grip on the Brompton Toptube. This allows these alternatives to carry more weight without the platform tipping to the side.

But these alternatives are also relatively heavy at around 280g. The FrameRack weighs around 90g, and the straps could be as light as a few grams by repurposing inner tubes, or the weight of removable TPU straps of your choice. The practical weight-weenie in me loves the additional functionality that the FrameRack adds to the Brompton.

Version Control:

• V1: Had more geometry underneath to allow additional mounting points.
• V2 (current): Removed the bottom geometry to simplify the design, removed the extra mounting points, added channel on the top surface so straps are more flush to the top of the FrameRack. Hole size and spacing remain the same as V1.

What I love about 3D printing is that it is relatively easy to make modifications to the design for specific needs. If you have any ideas or suggestions please let me know at [email protected]

I also hope to release a model that is compatible with the T-Line tube profile, unfortunately I do not have a T-Line to do test fits! Follow me on instagram to stay up to date on developments: @velocityprintworks