I am semi-new to racing and right now on my 00' 400ex got stock front tires and fast trecker 20''s on the rear. i was thinking of going wiht 18s on the rear and 19s on the front the track i race at it is smooth with many corners and the jumps have ok landings. i already have wheel spacers but it handles badly so i was wondering what tires or what else i could do to handle all them corners!

 

I would say 20-6-10 holeshot mx fronts and cut turfs for the rear. 18-9.5-8. I personally run the holeshots up front with the 18-9.5-8 shredders in the rear. I love the shredders but they have a lot of traction and take some getting used to to slide them well.

 

I would go with 18's on the rear but get holeshots the mxr's. I run them all the time and love the traction and they slide easy. I wouldn't get turf's because you would have to go through the trouble of grooving them and its a pain not to mention they wont fit on your stock rims. Also go with 20's not 19's you will feel every bump with 19's on.