Mountain Bike Data Logger - Fork Stroke Sensor (Cane Creek Helm 2 Coil)
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DIY Sensor to Measure Suspension Fork Movement; part of Mountain Bike Data Logger Project
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Informacje o modelu
- Źródło
- Printables
- Kategoria
- Outdoor Sports
- Licencja
- Creative Commons — Attribution — Noncommercial
Update 2026/8/8: I added a gusset where the circular part transitions to the downtime of the magnet mount. I noticed a small crack and a lot more flex. Maybe due to a crash but was an easy fix to make stronger and still clears the ribs in the lowers crown casting.
Background:
This is part of a much bigger system design which is detailed here: Mountain Bike Data Logger
Detail:
The front fork stroke sensor is specific to the Cane Creek Helm 2 with a coil (likely easy to modify design for others).
The top part, which holds the magnetic target, mounts using the same screw that holds the spring pretension adjuster, where knob is removed for a tight fit. Pretension can still be adjusted by removing the bracket.
The lower part, which holds the sensor, simply clamps onto the lowers.
Voltage divider is used to reduce voltage for Artemis OLA board. This is built into wiring harness.
Print Settings:
I used PETG with 60% infill. Organic supports were used. This part is long, so on my MK4S I needed to print sideways with lots of supports (see picture).
Parts Needed:
Fasteners Needed:
M4-0.7 x 10mm Flat Head Socket Cap Screws (standard for ISCG)
Top target mount uses the existing pretension adjustment knob screw
M3-0.5 x 20mm Standard Socket Head Cap Screws
M3-0.5 Square Nuts
Installation:
The top target mount uses the same location as the existing Helm 2 pretensioner knob.
The bottom mounts simply clamps around the fork's lowers.
Sensor bolts are all pretty obvious. Just threads into plastic printed part.
Disclaimer:
This is just an experiment and I make no claims or promises on safety. What you do to your bike is your business and your decisions. I am just giving ideas on how we can instrument our mountain bikes to learn. This project does add sensors very close to rotating components that could stop your bike quick. Install at your own risk.