tyre advice.... again?
 

I have tkc's on my xt660z at the minute but need new tyres. what are then k60's like does anyone use them and are they hardwearing and what is the biggest tyre on the back i could use i read some people use a 140/80/17 would the bike need any mods to take that size back tyre. i want knobblies but road legal and have always used tkc on my bikes but any advice is requested.
cheers

Don't know about the K60. More than happy with TKCs on the Ten, so haven't felt the need to try a different 50/50 tyre. However, I can tell you that a 140/80 fits perfectly without issues or need for modifications, I'm running one at the moment.

I would guess fitting a wider tyre gets you a better �footprint� but are there any disadvantages?

Ok where to start..
more surface area = less ground pressure...
Wide tyre rolls around on a lose surface , a norrow
tyre cuts though the lose top into the harder base
under it...
Wide tyres at lower pressures are harder to lean..
Wide tyres work better in mud/sand etc as they want to
sit on the surface...
Smoothish wide tyres are best for sand as they pack the
sand under them..deep treads work like shovels & move
the sand..' I'm talking beaches..sand dunes require a very deep
paddle style tyre..

So select tyres for your use/terrain not by size only..
one tyre size dosn't fit all siturations..
on gravel a norrow ADV road tyre is as good as a wide knobbly.."better"
If you are rideing seal a wide tyre at higher psi is best...