[AdamHeard]

For comparison sake;

We traditionally have run 22T sprockets for 3.5-4.5" wheels, and have a lot of runtime on that. It's bulletproof.

We ran 16T sprockets for 4.3" wheels for the start of the season, was bulletproof.

We then ran 16T sprockets w/ 6.3" wheels, and threw the same chain 3 times. I assume some sort of minor misalignment existed that was exaggerated by the very high chain load. This was late in the season and only on the comp bot (practice was fine with massively more runtime) so we never investigated the issue.

I'd say 16T sprockets are fine if your chains are all lined up properly for even 6" wheels, and are bulletproof for 4" wheels.

I know this exceeds the rated working load of the chain depending on how you look at it, but whether or not that situation actually arises is unknown.