Detail this asset from Unity Store: Original Link
This is a paid asset, but now you can download Quad bike (ATV) physics with “Wheel System” Free.
Quad bike (ATV) physics with Wheel System v1.01
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This is a “Wheel System” for fast creating and modifying many types of vehicles.
You just need to modify 3D model of your vehicle with specified hierarchy and after you can fast integrate it with this plugin
Template currently includes two types of quads ( ATV ), which differ in the structure of the rear absorbers,
Also you can buy adapted with this tool, many types of quads from Only Games iO
Note:
The driver 3d model in package downloaded from Standard Assets Third Person Character
Features:
– Work in mobile devices
– Based on the component Physics / Hinge Joint
– Well controlled on uneven terrain