Do a search for Chicago Velodrome or my user name. I bought one and posted some pics. The bag is perfect for holding all your gearing and some tools.

frictional loss
 

some trackkies are spinners, others are grinders.


Big rings and cogs vs. small rings and cogs?

56/15 vs. 49/13

almost same rpm, more frictional loss with the smaller setup!?

What chains do you guys recommend?

I use the black/blue HKK chain, the cheapest NJS one. Bulletproof. What were you using that broke?

KMC 710SL

I figured the master link had crapped itself, but I actually snapped a regular link somewhere.

That's pretty crazy. How old was the chain? I have never seen a 1/8" chain break.

How?

Did you ever take a pin out and push it back in or something?

Me either.

Carleton-
Any difference between the K710 and the K710sl...
I know that the SL is lighter... Wondering if its any real gain- or loss?
compare to the KMC D101?

The K710 is $14 on Amazon Prime right now- so it will al least be my off season chain...

I DID do that once. Accidentally had a pin come all the way out on me. Is that what did it?

Yup.

"SL" means Super Light. It just refers to the cutouts in the plates. Instead of having something like 4,000lbs of force required to break it, it requires 3,800, hahaha. It's a great option. I use that one, too.

Why?

Mushroomed pins aren't to be pushed back in.

On the subject of chains, can Pintle chains be considered for racing? Or should those be left for fixie crowd?

Ask your small, random, track-related questions here
 

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?

oops.

Ask your small, random, track-related questions here
 

Do like riding at the front or at the back in a miss and out.

the back.

That would be the case.

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.

Aren't those hollow pins? Master links exist largely because You're really likely to damage hollow pins pushing them in.

They are hollow. TIL to not do that.

Depends on the field. Smaller fields I like to be around the back the whole way. But a big field I will stay up front for the first half. Playing the devil the whole race is a lot of fun, but wears you out. It is good for working on points race skills. So sometimes I will be devilin' as long as I can.