dam the yeti 303 has the most unique rear shock system. the thing attached to the shock which moves the bike accordin to ur movment (the thing connectin bak wheel to bike) has this slider system so it rarely has to be oiled or lubed. since it does that when it slides back and forth it is so simple yet yeti were the only ones to fgure it out. and DAM this bike is soooo worth more then 2k pounds if only i ahd the cash--.