What arbor works? I tried the d-drive one for f103 my buddy had and it worked for the rears, but the front rim hole was too big for the arbor to hold
Ran my F104 with 17.5 first time. Pushed alittle as the rear was stuck but tightening the nut on the top damper plate thing helped alot.
I ran 4 runs of 6 mins with hardly noticable front tire wear, high grip asphalt 160'x90' track