When we're planning on cutting tube shapes, aero or standard, we'll need Park Tool's SG-7. 2 Oversized Adjustable Saw Guide. With this tool, we'll be able to slice through steerer tubes from 1-1/4 to 1-1/2-inch, not to mention integrated seatposts and any airfoil shape up to 3. 5 inches. Sloppy cuts are a thing of the past with Park Tool, and they've also included contact pads to protect our tubes and frames so we won't scratch any areas that should be left blemish-free.