i ride a 2008 400s mostly on the street. the only off roading has been a five mile stretch of unpaved road that connects chula vista to jamul. the trailwings lived up to their reputation on loose dirt. i went with the pirelli at90 front and rear, but they are not much of an improvement on pavement. the twisties in the san diego backcountry are a lot of fun. the trailwings performed well there, better than the at90s imo. after researching tt posts, the bt 45 bridgestones look to be the tire for me. the problem lies in the fact that they are tubeless tires. is there an issue here? can i still use the tube when i replace? i read some posts that had some guys doing sealant and other mods to go to tubeless. that is not for me.