Review on 🚀 FSA 1-1/8" Compressor Top Cap: Optimize Speed and Performance by Tom Beland

It's good design. You can adjust the position of the spreader plug in the steering column by about 2.5 cm - this allows you to set the plug at the same height as the stem. Having the plug at the same height as the stem is good as there is less chance of crushing the carbon stem and it adds a bit of strength to the whole system. Some of the expansion plugs I've seen sit on the top of the steerer tube and then when you tighten them they expand naturally leaving a gap between the top of the steerer tube and the edge of the plug, this one doesn't get much better Design. I ordered from Greenville Custom and they shipped quickly. Good experience and good product.