Mike450
Active Member
Hey guys, I'm finally getting back to work on my CB450 cafe racer project but I've run into an issue mounting the Dunlop D404 120/90-18 rear tire that was purchased for this bike. I can't seem to get the bead to seat on the inner "shoulder" of the rim. The front tire went on with almost no issue. I tired to take a few pics to illustrate the issue I seem to have. The diameter of the bead seems to be 1/4"+ smaller than the rim itself. Is that characteristic of tires that are intended to be run tubeless? I've only ever used tube-type tires on my bikes in the past and they seem to fit much more comfortably on the rim and seem much more pliable. Another issue with this particular tire was that the beads were almost touching because it had been wrapped so tightly when it shipped. I could barely force them apart enough to get the tube in.
Things I've tried so far:
- Removed and remounted
- Over inflated to 70PSI and left overnight
- Deflated, beat the shit out of it with a mallet, re-inflated (multiple times)
If it would stop raining I'd set it out in the sun for the day but is that really going help with such a big difference between the bead diameter and rim diameter?
Any suggestions would be greatly appreciated. I've only had this happen one other time with a Duro rear tire and ultimately the solution was to buy a new tire, same size and model and it went on fine.
Things I've tried so far:
- Removed and remounted
- Over inflated to 70PSI and left overnight
- Deflated, beat the shit out of it with a mallet, re-inflated (multiple times)
If it would stop raining I'd set it out in the sun for the day but is that really going help with such a big difference between the bead diameter and rim diameter?
Any suggestions would be greatly appreciated. I've only had this happen one other time with a Duro rear tire and ultimately the solution was to buy a new tire, same size and model and it went on fine.