Étiquette : bike

Garmin Varia mount for BMC Teammachine SLR

Shine Bright!
I bought a Varia almost a year ago, but I wasn’t a fan of the elastic straps used to secure the bulky mount to the seat post. So, I designed a custom 3D-printed holder that fits perfectly with the original Garmin interface — or the Mr. Control Garmin adapter I had lying around in my spare parts bin.
The design is tailored to fit the back of the 10mm offset BMC Teammachine SLR seatpost. The lower bolt tightens against the saddle clamp hardware, ensuring a secure and stable attachment.

I printed the part using PLA on my trusty Creality Ender 3. The hardware shown is temporary, as I plan to upgrade to sleek stainless steel bolts and nuts, replacing the standard ones pictured here.

  • The final version assembled on the seatpost and its design in the background.
  • 3D assembly in OneShape
  • Sub-assembly showing the Garmin Varia interface fitted into the 3D printed part
  • Mr Control interface version
  • Garmi Varia interface version

The OnShape document is here: https://cad.onshape.com/documents/41f742d35fa21c714c959bbe/w/7f583f7ca0d614f82062f985/e/afc66c373dd7cecbcffaf570?configuration=List_it9oCS0RFO6aM6%3DGarmin_interface&renderMode=0&rightPanel=configPanel&uiState=6742f0c923fc5934d5c89fc4

Thingiverse:
https://www.thingiverse.com/thing:6844047

Chainline tool: the ChainLineR

At work, I often need to quickly check the chainline of a crankset assembly. The ChainLineR is a simple gauge designed to make this process faster and easier, allowing you to measure your bike’s chainline and verify if it’s within the recommended specs for Shimano, SRAM, or Campagnolo.

  • The model
  • The 3D print
  • On a fixed gear bike
  • On a road bike with 2x crankset

While you can use a caliper to do this, it can be tricky to find a clear reference point to identify the center of the seat tube (e.g., the bottle cage bolt). The V-shaped design of the ChainLineR allows you to quickly center it on the seat tube or downtube, providing a rough but reliable reading of your chainline using millimeter markings.

An additional stopper allow you to place a ruller and get a more accurate read.

How to use:

  1. Position the ChainLineR on any symmetrical part of your bike—ideally the seat tube or downtube.
  2. Use the millimeter markings to read the chainline measurement.

Notes:

  • Some tubes may be asymmetrical.
  • The chainline for 2x setups is measured differently depending on the manufacturer. For example, Shimano measures from the inside of the larger chainring’s teeth.

Thingiverse:
https://www.thingiverse.com/thing:5519359