I remember reading here that there was a certain size inner tube that can be used in the front or rear, albeit for a short distance, when in an emergency. Can't remember if that is valid for the X & the R, and I can't for the life of me find the fapping thread!
        
 
         Preparing for a trip now, I've got a spare Metzeler, which was used in the rear, with the following text on the tyre...
         
         
        
4.50, 5.10, 130/70, 120/80, 130/80, 110/90, 120/90 - 17
         
         
        Also, ME-F17M/C(B)
         
         Can this be used for front & rear, if not, what size inner tyre can be used for both on an XTX?
         
        
 Cheers peeps 
        
