What chains do you guys recommend?
I use the black/blue HKK chain, the cheapest NJS one. Bulletproof. What were you using that broke?
On the subject of chains, can Pintle chains be considered for racing? Or should those be left for fixie crowd?
Any fans of inch pitch chains and cogs? Anyone use them anymore?
i don't know why anyone would bother.
What do you use for a jamming tool?
Do like riding at the front or at the back in a miss and out.
Pretty simple physics; assuming the same wheel speed the tighter the radius the more a chain has to bend so there's more friction in the roller and side plates if they are loaded. Friction = power loss. How much loss and whether that's worth paying attention to is subjective. Thing with going to bigger rings and cogs is you add weight and some aero drag. Balancing that equation takes some time and access to things most people don't have.
My quick mental mull would say bigger is a net gain. As an endurance guy who's lost a gold at Nats by one tick, it's worth paying attention to this stuff, but I also have a lot of time to work on other things. If you had 10 minutes to train, or ten minutes to calc a day, the benefit of the former would be obvious.