Hi All, Replaced my tyres the other week, and noticed the chain was rusting, even though its hardly ridden in the wet. Has 30K on it, but never ridden hard, so I didnt order sprockets. Was still in the Green band for adjustment too. So I ordered a new 525HX Chain, Cut it to length, but it will not for love nor money go around the front sprocket without buckling, like its pitch is too short. I did not replace the sprockets, as both Front and Rear 'look' perfect. The chain goes nicely around the rear with no issue. The Front sprocket is marked as 525 15, so my only question is, does the H in the 525HX have some bearing on the chain type. The sprocket also seems to have a rubber coating both sides like a dampener for the chain. Else I suppose I get a new front sprocket, and see if that solves it. Of course, now I'll have more issues getting the sprocket off without the chain attached. So no bike right now.