2nd generation RC30 with bonded dropouts.....nice
With no reducer shim (shown below) you will need a new crown to go bigger than 1 ".
The larger crowns have a slight bulge where the fatter steerer goes in. You will also need a Race Collar of the correct size (speak to Tim/Justbackdated)

With no reducer shim (shown below) you will need a new crown to go bigger than 1 ".
The larger crowns have a slight bulge where the fatter steerer goes in. You will also need a Race Collar of the correct size (speak to Tim/Justbackdated)