Cannondale Synapse 105. Nearing the end of a ride, I started to sprint in my highest gear. Derailleur randomly snapped at the hinge and the bracket at the back.
by hgrad98
Cannondale Synapse 105. Nearing the end of a ride, I started to sprint in my highest gear. Derailleur randomly snapped at the hinge and the bracket at the back.
by hgrad98
2 Comments
Yikes, QQ does your 105 also have a quick release skewer in the rear and thru axle in the front? Have you used used your bike on a trainer before? Picking up a trainer, but on the website it says it has a 130MMx9MM QR skewer, but no one seems to know if that’s actually correct.
Zooming into your 3rd photo which captured the fracture site. That is some serious corrosion there.
If I have to guess, the corrosion gradually weakened the alloy in the linkage until the forces from the derailleur’s return spring (which is quite strong) pulled it apart. I wonder what could cause corrosion like that.