beef2001

hi when bouncing on the rd the tyres clip the sharp bit of the metal and cut the tyres i was told need bigger springs too much hassle rolling arch back too much hassle what about going smaller width i got 195 45 15 do they do smaller? any recommendations? also the wheel came loose scratching noise called the aa they sed the hubnut has come loose he tightened it and nocked the nut into the groove with the nail puncher how annoying is this, he says u shudnt use the same hubnut twice what about loctite as well on it? luckily hadnt driven it too much but it has coloured the discs grr