The carbon fiber headset spacers are good for cyclists looking to fine-tune their bike's performance. These bike stem spacers are crafted to fit seamlessly into your bike's front fork, offers a secure and stable adjustment. Whether you're tackling rugged mountain trails or smooth road surfaces, these spacers will help you achieve the optimal riding position. Features -Color:Black -Material:Carbon Fiber -Size:3.50X3.50X1.00cm/1.38X1.38X0.39in -Enhanced riding efficiency: carbon fiber construction offers a significant weight reduction, boosting riding efficiency for mountain and road cyclists who prioritize speed and lightness -Improved fork stability: the bike stem spacer provides enhanced fork stability, effectively minimizing vibrations on tough roads, leading to a more comfortable ride -Good fit: precision manufacturing ensures a good fit with the fork headset, enhancing steering precision, ideal for challenging mountain or road cycling conditions -Longterm performance: the bike stem spacers are wear-resistant and sturdy, maintaining their performance over extended use, reducing the need for frequent maintenance -Easy installation: universally designed to fit various bike models, these spacers are easy to install without the need for extra tools, catering to the upgrade requirements of different mountain and road bikes Package list: 24 x bike stem spacers