Review on LERWAY Bicycle Bike Stem Riser by Timothy Kiley

I'm not sure about the performance yet, but I'm having a lot of trouble installing it. First I had to replace the original spacers under the extension because they were too short. The video shows that there is some sort of collar with a logo that I had to add spacers to. Then I thought that the screw is too long because it doesn't tighten. Then I tried inserting an uncapped screw and it inserted well. So I brought the cap to the top of the screw until it reached the shank. Even tightening at this point didn't eliminate play in the stem because the bolt wasn't tight enough. I used my original stem cap and as soon as I tightened the bolt the play in the stem was gone. Such precision is absolutely necessary, and it's hard to believe that it has been neglected.