gearing question

rlh2000

Question that will show just how little I know about the mechanics of bikes (and will get my engineer card taken away from me). I ride a 2009 Trek 2.1 road bike (fingers crossed tri bike is in the budget for next year) and doing IM Wisconsin.  I know Rich and others are saying to go with an 11-28 cassette. My bike does have a triple crank, and my googling is making me think that this is getting me similar gearing options as the 11-28 would- am I totally confused or is this correct? Yes, I know I'm getting down to the wire with making gearing changes... 

Eric Rueppel

Using this gear calculator it does seem that you are close to the same gear options as the 11-28 with a compact crank.

http://www.gear-calculator.com/#c