It usually happens once every couple of rides, but today it happened twice.... I downshift from big to small ring in front, and I find that the freewheel has let go, and I'm pedaling forward with no load. I back pedal, forward pedal a couple of times, perhaps upshift on the back, and it finally engages. I'm positive that the downshift to the smaller front ring was clean, ie the chain was not floating (I can see the chain engaged in the teeth).
Is this repairable? or am I gaining justification for a wheel upgrade? They're basic OEM Alex AKX R2.0, nothing special, with 2500 miles on them.