Originally Posted by
creativepart
My hybrid has the following gears; 11/26 9-speed cassette and 48-36-26 (2011 Trek FX 7.5). My new road bike has 12/26 9-speed cassette and 53/39 double (2005 Trek 2100).
Here's your benchmark. If you can consider climbing hills in the middle chainring on your hybrid (lowest available gear = 36x26) then you'll be fine with a compact. If that feels like it would be too tough, then I'd recommend the triple.