what size rear tire should i get on my 400ex for MX racing....18's or 20's

 

18's for faster accel and low end.. 20s for top speed..

thats all i know

 

It seems everyone is running 18" tires. There usually isn't a lot of call for a taller tire, most tracks are fairly smooth....not all but most. As for 18" for accel and 20" for speed...that can be controlled by running different sprockets...

 

oh.. dunno.. its personal prefrence then.. becuase i dont ride a sport quad anyways.. lol