“I ordered several headset spacers from Kustom Ventures as I moved a computer mount off the stem. The spacers were all tested for fit and finish (great) and the 10mm was installed on my older Trek Madone. Unfortunately I only used the spacer for one ride as I hit a car that made a turn in front of me. The car one fiber steerer tube broke, but the spacer stack remained tight. I'll be using one of the 5mm spacers on my gravel bike. Hopefully I get to use it for more than one ride.”