Welcome to TE, Jacquie! I just recently purchased a Cannondale carbon Synapse and I love it very much.Based on your height, I think you will fit in the WSD category - the smallest WSD Synapse size is 44 so that may be worth considering if you have a dealer in your area. The Ruby, Domane and Synapse are similarly intended for the more relaxed position vs. a racing bike. I road over some very bumpy roads on the Synapse recently and while I don't exactly have a good comparison (first road bike), I felt fine after a 20 mile ride.
The Ruby is also a very nice bike and there seem to be more Ruby owners than Synapse owners on TE so they might be able to offer advice on similar bikes that they tested. If not for the nicer LBS and a deal on my bike, the Ruby would have been the other top contender for its comfortable ride and sleek lines. The Synapse is touted for its comfortable ride over rough roads if the geometry is something that you like. While the Synapse is known as a relaxed geometry bike, I find that it can still go plenty fast. If you're looking for a more agressive geometry, it would be the Cannondale Supersix, Specialized Amira/Tarmac and I believe the Trek Madones.
Good luck in your search and keep us posted!



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Based on your height, I think you will fit in the WSD category - the smallest WSD Synapse size is 44 so that may be worth considering if you have a dealer in your area. The Ruby, Domane and Synapse are similarly intended for the more relaxed position vs. a racing bike. I road over some very bumpy roads on the Synapse recently and while I don't exactly have a good comparison (first road bike), I felt fine after a 20 mile ride.