Have you chased the threads with an M10 tap? I did not do this after having a frame resprayed and cross threaded a rear mech on by being pig headed.
By rights you shouldn't have to given its a new frame from Colnago, but it's simple to do and should get you going
Don’t have M10 tap. Will add to my complaints list for Colnago
@Alanbt started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
Have you chased the threads with an M10 tap? I did not do this after having a frame resprayed and cross threaded a rear mech on by being pig headed.
By rights you shouldn't have to given its a new frame from Colnago, but it's simple to do and should get you going