Who ever would have thunk it, a broken SRAM chain. Unless your willing to step up to a SRAM 991 Cross Step chain, its probably going to continue. I use Shimano chains, mainly the CN 7701 XTR chain. They use center punch pins and are usually available for $25-$30 online (vs $45ish for a 991 Cross Step) and if you want the ability to remove the chain tool free...you can use the SRAM Powerlink on it.
There's much anecdotal evidence that certain chains are stronger than others, so you might try other brands. If you're breaking chains by pushing the plates out over the ends of the rivets, look for chains with better rivet heading, including Taya, and KMC among others. Also ride the widest chains that will work with your gear system. Usually you can ride chains designed for fewer gears, though trim becomes more critical.
All that will help, but only so far. Improving your riding and shifting style will do more to solve your problem than changing chains. People who break chains do so because of poor shifting technique - waiting too long before shifting then trying to force a shift under load. This puts tremendous side and twisting stress on chains leading to premature failure.
There's a distinct sound a poor shift makes. Listen to the sound of your shifts, and if you hear that kerrunch-doink sound of a shift under too much load, learn to associate it with the cost of a new chain.
I was the same size as you. The only chain that I ever broke was one that I tried to add a link to. (My fault) Otherwise, I wear them out long before they break.
Shifting is two fold. One, that you anticipate the needed gear and are there BEFORE the hill is steep. Second, that you make one revolution without putting any pressure on the pedals while you shift. I've heard it referred to as "ghost" pedaling. You can shift on a hill but only if you don't stress the chain while you are shifting. Chains are not designed to withstand much lateral force.
It's not the chains, It's you.
Improving your riding and shifting style will do more to solve your problem than changing chains. People who break chains do so because of poor shifting technique - waiting too long before shifting then trying to force a shift under load.
I totally agree with this. Over the past ten years I have weighed between 190 and 200 with gear and have NEVER broken a chain, and I use the cheapest SRAM/Sachs I can get. I have one friend around my weight who has broken at least 3 in the same period of time. He happens to be rather ham-fisted about his shifting (and everything else about riding).
Even if the chain snaps when you are not shifting (which it usually does not) it gets weakened and snaps later under heavier loads.
Agree with what's been said plus often a source of weak chains is poor installation/breaking technique. Reusing pins can be a problem, having a binding link can be a problem.
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