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The rear wheel discussion came in, I believe, with skyking at #227 on 6/17. I had forgotten this project is FWD. Most trikes are rear wheel drive with motorcycle swing arms. Rear steer is tricky since it is speed sensitive and the HPV folks have had trouble with this. A motorcyle tire is designed to lean but usually wears much faster than a car tire. In this case I would suggest making the rear swing arm a single side, angle section piece. The lean angle could be tuned by changing the length and thickness of plates on the verticle portion of the swing arm as well as the rates on twin spring/shocks.
Without knowing particulars I imagine the front tires might be 65 series 13 in. The rear tire could be a 15 inch to give a longer tire patch.
Thanks for your patience.
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