17 or 18 wheels/tyres

[sh123]

As above.

What are the pros and cons of each?

Will be going on a wide arched compact with hockly kit, ive not seen one running 17s before?

[mrfuzzyfelts]

18" are much more available

Easier to get good part worn WRC tyres

17" ? possible heat up a fraction quicker which could be good or bad!

Defo go 18" IMO