I have a 2012 Giant Talon 1. The stock chain is a KMC Z7. 2 months ago I was riding a trail, hit a step part while I was in to high of a gear (meaning a smaller gear in back and large in front). I stopped at the bottom, shifted while I spun the back wheel in the air to shift to a lower gear, hopped back on, pedaled up, and promptly snapped a link. Got some KMC masterlink II, put on it, and let the bike sit for a while (couldn't get a chance to get out and ride). I rode 1 time on a paved path with road tires on, no problems. Then the bike sat for a bit again.
Fast forward to yesterday. Went riding on trails, went up a steep-ish hill in a low gear (smallest cog up front and second to largest in back), wasn't standing up on the bike at all, and was pedaling with a good cadence (around 90). Halfway up, snapped another chain. I didn't have a second master link, and I wasn't able to get the chain back together, so I had to walk the bike back to my car. Thank goodness I wasn't too far from the end of the trail.
I did some research on the KMC site, and the Z7 chain is "7 speed (casual 8 speed)" chain. The measurements are 1/2" x 3/32". Now, I'm 6'3" and 307 lbs. I have always had super strong legs. Is there a super strong chain I can buy that will fit?? I was looking at the KMC X8.99 chain. The measurements are the same. Will this chain work? Its meant for an 8 speed bike (which I have, 8 in the rear and 3 up front). It also says that its got mushroom pin rivets, and it is super stretch proof. Think this will be strong enough? I love riding, its really helping me get back into shape, but obviously it kills the fun if I can only bike for a bit before I break it.