I am 6'8" 300 pounds, 53 y.o. and I've been riding casually for about 12 years. I ride a Giant Defy2 which I had to replace under warranty due to a cracked frame--this makes me a more hesitant rider at my weight. I'm looking to knock down to 250, and don't see myself doing much in the winter in NYC, but I have a positive mind set. Looking forward to amping up my game. Also, I need to learn more about bike maintenance and I am looking forward to any tips of which clydesdales should especially be mindful.