Tandem, Ryde Andre (box type) rims, 25,000 miles, riding with 2” tires at 55 psi. I have recently noticed that the front cantilever brake pulses at 1 spot in the rim. The rim is fairly true without a hop at the place in the rim. With calipers I find that the rim is 10 mils wider at the spot relative to the rest of the rim. Have people observed such rim bulges? The brake pulsing is a bit annoying. I am tempted to put the rim in a vise with leather protection and squeeze it a bit, but aluminum doesn’t response nicely like steel.