Join Date: Mar 2010
Location: Mount Vernon, WA, USA
Re: New Tire Will Not Seat
Had the same experience with some GS tires. Two sets in a row. Seemed like the internal bead diameter was 1 or 2 mm too small. Anyway, you need to clean the inside of the bead hump in the drop center where the tire bead has to go over to slide to the inner edge of the rim. This is where your tire was hanging up. I also use NoMar bead paste on that part of the rim if there is a problem. Larger tires like 190's or 200's on the K bikes and S bikes have to move the bead across a relatively shallow drop center. I always lube that area to get the bead to slide across. I get nervous at 80 psi too. Very rare though. Those two sets of tires were from China just as the manufacturer changed from Europe. Probably a different mold. Tires in question were Metzler Tourance, I sent them a note but no reply. An older rim will show corrosion inside and all that needs to be removed with scotch bright and a clean rage with something on it to help swab out the junk before lubing it well. Some tires are a battle. I had a guy in with a mid 80's Honda who wanted tires replaced. I spent half the job cleaning the insides of the rims of corrosion because I knew there was a problem. The owner said his tires were leaking a few psi each week. Bad sealing, no holes and stem was okay.
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I change your tires $50, you buy them on the web.
K13S, S1000R (gone through a few GS's & RT's)