just wondering what the most popular choice is out there and why??

im about to buy a new chain and sprocket kit and havent decided on if i should stay stock with a heavier chain 530.. or switch over to a 520. lets keep in mind im about 270 lbs and i ride every day. i will also be going down one in the front and up 2-3 in the rear.

 

A good quality 520 chain is plenty strong enough. It's also about 2lbs lighter than a 530 chain so there is less rotating mass. With -1/+2 you can stay with stock length chain.