Upgrade c'dale caad10 5?

[cyclocat]

Hello,

I've got a 2012 Cannondale CAAD10 5 with 105 5700 drivetrain, FSA Gossamer crankset, and Tektro R580 brakeset, Shimano RS10 wheelset.

With the newer 105 5800 groupset going for about $375, should I upgrade with all new 105? The current group works fine. Is it worrh the extra cog and improved performance? Your feedback is appreciated.

 

[Uawadall]

I just went from a 10 speed on my Cannondale Synapse to an 11 speed on my BMC TMR02. I definitely cant tell the difference between 10 speed Tiagra and 11 speed 105. If everything is working fine, your 375 is best spent elsewhere. Its all about gear range, 11/10 speed will offer negligible differences.