Review on 🚴 Versatile 12 PCS Bike Headset Spacer Set: Aluminum Alloy, 1 1/8-Inch, for MTB BMX Road Bikes by Martin Dosunmu

I have swapped stems on two bikes, each with 3 x 10mm spacers under the stem. With the new stems, each bike needed less than 30mm, but I wasn't sure of the exact measurements and didn't know how to fine-tune (bar height) where the spacers would be. This kit was perfect. I ended up placing 20mm under and 7mm (5mm + 2mm) over the stem. On the other side 20mm + 4mm (3mm + 1mm) deeper. It's a great value and they work just like they do at home. I am also ready with additions if I make any changes to this or other bikes.