I've just bought some 26" Marathon Plus Tour tires for a mountain bike I'm fixing up for touring. I had no problem mounting the front tire, but I'm having a hell of a time getting the back one on. The rims are the same size, but the back one is of a different make.

I've tried dishwashing liquid as a lubricant, but that didn't work. Any tips on mounting this tire?

Thanks,

Ekdog