[sdcantrell56]

Originally Posted by PAR_WIG1350

Now that I think about it, you're right. this years robot had many issues with 35 chain, but the 25 chain never failed.

but still, if you take the time to tension the sprockets properly, timing belt is another option

There is no question that 35 chain is more forgiving than 25. It allows for much more carelessness in design and misalignment albeit at a huge weight penalty. I would look at the systems in question on your design and try to identify the cause of the failure as it is not from the chain itself but rather the implementation.