Joined: Feb 2012
Posts: 19,373
Likes: 5,516
From: Rochester, NY
Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Mongoose Tomac ATB, GT Bravado ATB, JCP Folder, Stewart 650B ATB
I agree that the lines look to be ply edges and not cracks. Note that the steerer looks to have an AL core. This is added insurance for compressive issues (stem clamping) and integrity.
Out of curiosity does the fork/bike instructions say anything about a compression plug need? Andy.