cSixx Seatpost Clamp A simple yet perfect part with a beautiful CnC'ed finish and in a colour of your choice, the cSixx Seatpost Clamp is the perfect addition to your bike. Designed and manufactured completely in-house at cSixx’s factory in Cape Town, we pride ourselves on our excellence in design and manufacturing. With our commitment to Vertical Integrated Manufacturing and our state-of-the-art facility, we are able to produce high-quality products with all processes in-house, that are built to last. Made from the finest materials available, in this case, a 6082 aluminium Seatpost Clamp body, 7075 aluminium Rotational Nut and a coated Stainless Steel bolt, the cSixx Seatpost Clamp is durable, lightweight and has a smooth tightening action, ensuring a perfect fit, form and function for your bike. We focus on designing and building a product that lasts longer than the lightest. South Africa has some of the toughest conditions in the World for cycling and that shows in the durability of our product range. Available in the widest range of sizes available anywhere, 9 different models from 28.6mm to 40mm. If you can't find a size get a hold of us and we can look at making a specific size for you. Please note that Custom colors can take up to 5 days to process and are not returnable. Sizes Available: 28.6mm 30mm 31.8mm 34.9mm 36.4mm 37mm 38.5mm 39mm 40mm Note: We recommend using a Vernier caliper to measure your frames seattube outer diameter to select the perfect model. Please note that Seatpost Clamp sizes do not match seatpost sizes.