The ArrowHeat 406 (20") rim is used on some trikes. My 2003 WW 3.4 came with ArrowHeat rims as original equipment. Now it is only used on the more expensive versions of the WW tikes. It has given me good service. The rim has stayed true in spite of over 5,000 miles on the trike. The stock tires on the trike are Kenda Kwests. They are a fairly wide tires. I'm pretty sure it would accommodate narrower tires if you chose them.