Ok thank u. This is only my second year racing so I'm trying to learn alot. And if u dont mind me asking what u think duro should be around?? 50 Or softer. I'd imagine gona need softer tires. Alot of my sets are 55-60 duro. I'll have to prep them down to get soft.Agreed with Brian as well, in order to use krug you'll need to cycle tires out and resand at a minimum to get the best results each time out. Something like Brian recommended such as his Monster Bite or Donnie Nalls aggressive would be substitutes that are easier on the tires and easier to work with if you're concerned about going with the aggressive aggressive route.