-Developed for technical off-road use, but has a motocross inspired tread design to perform well in faster, more aggressive cornering and braking. -For maximum off-road performance, the Recon is not compliant. If you want to run a Mousse style foam tube, here are the recomendations: -Michelin Bib Mousse Foam Tube 90/100x21 (M16) Part #1033980014 -Nuetech Nitro Mousse Soft Foam Tube 90/100x21 Part #1942320007