4bar-bike-suspension-analysis

Mountain bike suspension analysis for four-bar linkages: rear wheel and instant center of rotation paths

Usage:

• Add a bike picture (.jpg,.jpeg) to the current directory
• Run python3 4bar_analysis.py
• Follow the instructions on the image
• The analysis plot 4bar_analysis.png is saved to the current directory

Features:

• Automatic linkage configuration detection (linkage-driven single pivot, Horst link, Split-pivot, VPP, DW/Maestro link)
• Calculate linkage, rear axle and instant center of rotation positions based on main pivot rotation
• Plot rear axle and instant center of rotation paths
• ⚠️ Absolutely not accurate

(image source: https://www.santacruzbicycles.com/en-US/nomad)

Python dependencies:

• Python >= 3.7.1
• NumPy >= 1.15.4
• SciPy >= 1.1.0
• Matplotlib >= 2.2.2

ToDo:

• Calculate shock rocker mount path
• Calculate rear wheel/shock travel
• Plot leverage curve (rear wheel travel/shock travel vs rear wheel travel)