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               Originally Posted by 
              jo75  
              I might try that jon, it's bloody tricky trying to get an E10 on with that lip in place,the front just slips on.Must be there for a technical reason.Do you know if it's on the exel rims?.
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         I believe its there too stop the tyre dropping into the bead well if you get a puncture. But numerous punctures later and ive never had a problem with that happening.
         
        
 It isnt on any of the excel rims i have on my other bikes, or the ktm front wheels i use with my WP conversion. Infact Ive never seen it on any other tubed rim before. 
         
        
 I found the easiest way too remove it is with a very course file. I believe its called a ******* file. (b-a-s-t-a-r-d) And then smooth it off with a finer file. Ill take pics next time i have a tire off.