Don't know about the small ones on grass, but I had 500X5 on my first KR and it was sweet. I have the small ones on this one and am concerned about landing on grass with them.
See N64KR at http://KRBuilder.org - Then click on the pics See you at the 2007 - KR Gathering There is a time for building and a time for FLYING and the time for Flying has begun. Daniel R. Heath - Lexington, SC -------Original Message------- I am trying to decide whether to use the lamb 10x400-5 or the normal 500-5 tires.