I ride a Specialized Roubaix Comp (2010) and also a Trek Fx7.3 (2010). While I love the Roubaix, the Trek is so much easier to use for hilly routes. Though the Trek (with panniers etc) is 2x the weight of the Roubaix, it is so much easier to ride uphill in its lowest gear (Front "1", and rear "1"). Obviously this is due to the gearing ratios and so I am wondering if it is possible to switch out the cassette on the Roubaix so that its easiest climbing gear is comparable to the Trek - and still just have a double on the front of the Roubaix. Would the Roubaix's Sram Rival shifters still shift the same? Here are the gearing specs for the two bikes:
FRONT CHAINRINGS 50 x 34T
CASSETTE Shimano 105, 10-speed, 12-27t
Trek Fx 7.3
Front Crank Shimano M361 48/38/28
Cassette Shimano HG31 11-32, 8 speed
What I want is the same (or easier) climbing ability as when in the easiest gear on the Trek.
Any help appreciated.