Put me down in for 4wd (ProCat) as well James - what front tyres do you guys use on a 4wd?... I have brought some of the 4wd 2-row studs & I have some of the wide cut staggers too?
Normally spikes work best on 4wd, I haven't tried either of those choices yet but at a guess I'd try the wide staggers first.
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Speed Matters
Friday Night Buggy Racing nr. Milton Keynes - TCRCMC