had the same experience with the new 28mm gravel king slick on a MA40 rim
first tire I have ever had to use levers to get the first bead over,
had to use soap and kook stop and lots of time to finish
and getting it off was just as hard
overall it seems vintage rims and TLR are not a good combo.
I will try the 28 in a TB14 in the near future and see if it is any different
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