Airtran allows carry ons that are 24" or less in length. I have a suitcase on rollers, the suitcase part is less than 23 inches but if you include the "rollers" in the measurement, it looks like it is longer than 24" but less than 24.5". The width & height are way under the max so the overall dimension is under the max. Will I be able to carry this on? Thanks!