If you're squeezing capacity out of a derailleur then size the chain properly (big/big not through mech to tightest possible join + pair of links) better to be floppy in the small/small combination you shouldn't use than explody in the big/big combination you shouldn't use.
If you're squeezing capacity out of a derailleur then size the chain properly (big/big not through mech to tightest possible join + pair of links) better to be floppy in the small/small combination you shouldn't use than explody in the big/big combination you shouldn't use.