I have a 2011 Salsa Casseroll with a Shimano Tiagra-GS cage rear derailleur. As delivered, it has a triple up front (26,36,48) with a rear cluster of 12-25. Great fun ride for day rides, I love the closely spaced gearing. However, thinking I may use this bike for a CC tour, and I'd like to have some lower gearing. Shimano's documents on the rear Tiagra indicates a 22 tooth range for the front and a max of a 27 tooth on the rear.
I'm wondering if anyone has pushed the rear to a 11-30 cluster? If I don't cross shift the gearing will the rear derailleur handle it? Or should I look to change the front to a 24,36-46 set? Still not as low as I'd want though unless I get a rear derailleur that has the max 27.