JRFOTO Carbon Fiber BIKJRFOTO Bicycle Headset SPACERS 1 1/8" Set STEM Set 5-10-15-20mm 4 pcs CC01

These things definitely are sharp. I've had them on my Giant GT for about a year now & there's no signs of wear. They did have sharp edges & slight flaws (i.e. nicks in the corners, etc.) but it was super easy to pick the right size for the stem riser I'm using. Not top-of-the-line, but I really don't think anyone will notice on the actual bike.

Pros: The look good, fit good, and are inexpensive. The carbon fiber looks cool.Cons: The feel a bit "gritty" in comparison to the smooth metal spacers they replaced.Bottom Line: I like them, but would really consider buying metal ones if I had to do it all over again. Been using them for six months or so. No issues.

They are great quality but...It did not fit 2 of my specialized bikes (Sworks Amira & Tarmac SL4). with a lot of sanding with 200 grit sandpaper and some grease, I was able to make it fit...they don't line up very smooth, but it works, its carbon and light. I'm happy with the results but not the labor... keep that in mind

Exactly what I was looking for. My bike is so light now that I'll be able to do those wicked rad Trix I did when I was a kid. Knocked off a star for a bad cut on one. Used the extra as a key chain to help my car go faster. Sweeet

I wish they would seamlessly blend one place together, also when it's the last one on top you can see the sides, it just looks like ashy plastic. I ended up using an aluminum spacer on top so that you couldn't see that ashy plastic.

Pretty good! Look clean! Little bit hard to put on, just out a little bit of pressure. Only wish there was more variety of sizes to adjust to the desired length, but they work fine! No problems so far!

These are super cheap. That being said, they still look great on my bike! One this to watch out for, I don't believe they list the thickness, but they were a bit thicker than my stem. If that won't bother you though, then they're great!

good product, the finish is smooth, but be advised they are heavier than the light alloy headset spacers. That being said if you need carbon spacers these don't 'compress' like some of the cheap ones on ebay.