Originally Posted by
Nims
See your answers are usually helpful, you just give them to people who didn't ask the questions. I'm sure that situation would be dissapointing, but I'd be willing to bet that the vast majority of casual track crank users represented here by the OP will NEVER be in the situation.
The kind of person who'd be hanging out swapping chainrings is going to know what crank to buy in the first place, and if they didn't, they'd be asking the friend who has the 49 for them to borrow, not us.
Perhaps but that is why I said "if you actually plan on using your track cranks on a track" I think there are plenty of track noobs who don't know the different bcds before they buy/build there first bike.