F1 2011/cars/render_materials.xml
<tyre_wall_colours>
<tyre_wall tread="SUPS" red="0.972" green="0.045" blue="0.066" alpha="1"/>
<tyre_wall tread="SOFS" red="0.937" green="0.803" blue="0.145" alpha="1" />
<tyre_wall tread="MEDS" red="1" green="1" blue="1" alpha="1"/>
<tyre_wall tread="HARS" red="0.603" green="0.603" blue="0.603" alpha="1" />
<tyre_wall tread="INTS" red="0.101" green="0.635" blue="0.862" alpha="0"/> better ... ="1"/>
<tyre_wall tread="WETS" red="0.988" green="0.411" blue="0.098" alpha="0"/> better ...="1"/>
alpha=0 only Pirelli, alpha=1 Pirelli + lines in tyres