Any of these:
http://www.racing-cars.com/sp/catego...uck_Tyres.html
Compound and 'tread pattern' will depend on what surface you are running on.
Yellows are high grip but wear faster, Blue's lower grip but hard wearing.
Micro spikes, very high grip (ideal for polished surface) but also high wearing. Vee2 & Vee 4 harder wearing and Mini spikes somewhere in between.
Never used the stagger rib or Chevron tread patterns but imaging they'd be better for a high wear surface like gravel, tarmac, etc.
Using the part numbers you can shop around at any Schumacher stockist, you don't have to order them direct from the link I put above.
Hope this helps!