yeh, it'll be alright, just make sure you get a strong chain or you will snap them like no tomorrow

if you can, test both out, but 25/11 being 2.27 i dont think you will notice a huge difference between that and your current 2.13 ratio, but you will notice a difference between 2.13 and 2.5

higher the number, harder it will be to pedal, most stock bikes come with about a 2, however some people like it easier and some harder than this, so neither is better, however, most people prefer for street and dirt a bit over 2, mines 2.4 :) i like it

pretty sure your chains on upside down lol

mine are way louder than most lol, maybe yours are duds

lol how could you hardly hear yours? the hubs are really loud!

yeh its pretty light, its really really strong and stiff and can take sideways landings very well, ive screwed a few 180's up and its held up fine, still true, very happy with the rim, its actually the old subrosa rim, and that has very good reviews , only problem is that the tyre is extremely hard to get on!! overall i highly recommend this rim if your using it for street or dj

haha sorry, its already on my bike :P but the rim came with a bit of cardboard attached showing specs of the rim and that says that the 26 inch version weighs 570 grams :)