I just put a pair of these on my 26" wheel recumbent. (I only ride on roads.)
http://www.performancebike.com/bikes...3_20000_400237
These are a bit wider, lower pressure, cheaper and without a kevlar belt.
http://www.performancebike.com/bikes...3_20000_400237
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Bacchetta Giro A20, RANS V-Rex, RANS Screamer