Need info on Campy Chrono chainrings

[Synoo [Bot]]

Hello Campy fans. I'm a recent convert to Campy (riding a Centaur 10sp group mated to a Lemond Tourmalet) and have a question on chainrings. I'm looking for a "pro ring", or rather a 55 tooth outer chainring. I found one on Harris Cycles but can't seem to find any additional information on it on the web or the campy website. Anyone know what the Chrono designation means? Any info is appreciated.

Ruben

[Synoo [Bot]]

Thanks for the info. I don't do a lot of time trialing yet I don't have any hills around me so I've thought about moving it up a notch on my rings. Thanks again.