I've been running a Metzeler ME880 Marathon (Belted) tire on the front of my rig. Life has been...OK...at around 8-10k per tire. But there are some people who are running rear tires on the front of their rig and I'm interested in researching that option. So far, I'm not finding any *rear* tires in that size other than a few OEM gumballs used for small sportbikes. I don't think I can fit a tire wider than a 130 up front on my existing rim and fork sliders. Does anyone have a recommendation for a better tire in the sizes I've listed above, or am I best off to stick with the Marathon fronts as long as they keep making the belted version??