I have a Specialized Roubaix Compact 2012 model with 10 speed Tiagra and I am looking to upgrade the shifters and front and rear mechs to Ultegra.
There seem to be some good deals on ebay and I found some Shimano Ultegra ST6600 SL STI 10sp Brake & Shift Levers (Double) listed.
Will these be compatible with my existing Tiagra until I upgrade the rest ?
What bike and bike bits should you buy?
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