I'm only using a 212cc motor but I want more than just bicycle tires and can't justify spending almost $300 on simplex tires, not to mention the ones I really like are >$200.00 each. I ordered the rims for $75.00 each along with these tires in 21 x 3...
http://www.bikebandit.com/shinko-244-motorcycle-tire?WT.mc_id=2576240&WT.srch=1
From what I've found on the internet the overall diameter should be between 27" and 28", my plan is to get the tires mounted and build the bike proportionate to them so it will still look good. The tires have a 4 ply sidewall, are dot approved, and only cost $28.00 each. Hopefully it will work out well.
http://www.bikebandit.com/shinko-244-motorcycle-tire?WT.mc_id=2576240&WT.srch=1
From what I've found on the internet the overall diameter should be between 27" and 28", my plan is to get the tires mounted and build the bike proportionate to them so it will still look good. The tires have a 4 ply sidewall, are dot approved, and only cost $28.00 each. Hopefully it will work out well.