Had a flat tire this AM on one of the 30X3.5 demountable tires. I took the tire and tube off--seems like quite sharp edges on some parts of the rim. I`m also wondering if the edge(s) might be a bit collapsed (due to driving on them without a tire?) Any way to check this? Do you use a grinder to remove the sharp edges? Thanks for any help/suggestions----Paul

Find a better rim.

I agree. You might be able to fix it with sufficient investment of time and/or money, but getting a good one will save a lot of expense in grief and/or dough.

Paul,
I would remove the sharp edges and brush on a good coat of paint on the inside of the rim making sure to let it completly cure and now I'll ask the question......

Were you using flaps? : )

Good Luck!
Floyd

Paul, the easiest way is to buy a better rim. If it's convenient and not too expensive.

Still, many rims can be successfully rehabilitated without a great deal of work — you might be back driving on yours before nightfall.

Re-curve the edges that appear to be compressed with a crescent wrench or similar bending tool. A bit of hammer/dolly work might be necessary after the initial re-curving. Take a grinder to the sharp spots and bring them down to where the metal is thicker. Use a file around the edges (all the way around) to make them nicely rounded and then sand smooth.

I have done this on a number of marginal rims and never had a resultant rim cut or other problem. Average time is an hour or two per rim. Top photo is before and after — these particular rims had only few sharp spots, mostly just rough and rusty edges. I have rehabilitated sharp-edge rims the same way.

Thanks for your input, guys---especially Chris as I have just "rehabilitated" my rim, mounted the tire and all is well. RE:flaps--Yes and no. You really need them if you are using those chinese butyl tubes. They are thin and easily damaged with tire tools--the flaps keep them out of harms way... Thanks, Paul