Howdy, I just switched my rear tire from a Kenda 601 to a Mitas E07+. When mounting the tire I noticed that there was only a very small gap between the tire and lower part of the exhaust - like maybe 1/8" an inch. So I put some washers under my exhaust mounting bolts to move it out a bit. So maybe know I have a 1/4". This seems close to me.
Could I overheat the tire or melt the tire? What is the recommended distance of separation from the tire to the exhaust? Heck, maybe it was this close before the tire change, because I never looked!
On another note I went thru a life transformative experience in figure out how to mount those Mitas tires!!!!!!! Holy mother of god are those tires stiff. Normal mounting techniques, even if you have theoretical frictionless mounting lube, will not work. To make a very long and sad story short, I bought some big zip ties after watching some Youtube videos and that is the trick. My procedure is as follows:
1. Get one bead over the rim (with these Mitas tires that is a chore!!).
2. Insert tube (well coated in baby powder) and get the value thru the rim. I inflated my tube to better set it in place and then deflated it by taking out the stem.
3. Use 5 or 6 zip ties to pinch the beads closer together on the side with the valve stem. It is difficult to feed the zip ties under the tube and fish them out the other side, but with practice it is not hard. Important note!! Do no tighten any of the zip ties until all ties have been feed under the tire!
5. Use your knee to compress the tire as much as possible and get those zip ties tight!
6. Start spooning on the the side with the zip ties. I just used Windex as a lube. The first 3/4s of the tire goes really easy. Because the sidewalls are compressed the tire finds the center of the rim on its own, giving you that extra 1-2 inches that makes getting the bead over the rim at the end EASY.
7. As slipping the bead under the rims becomes more difficult use LOTs of Windex. The bead of the Mitas is so thick and hard that they can be bent or deformed by the spoons. I found that there was a critical 1-2" where I had 3 spoons going and looked like I was playing Twister from my youth.
8. Once I had the tire mounted I went around the tire with one tire iron and pushed the bead down and sprayed in a lot of Windex. I did this on both sides of the tire before inflating to 40 psi to set the bead.
I ended up mounting these tires 3 times because on the first 2 attempts I had pinched flats!
But now I have confidence that if I am in the boonies that I can do a tire repair on the side of the road.
IMHO everyone should experiment with zip ties. Even with normal tires it will make mounting a snap.
Cheers, Yukon Pete