I tried it on once, but the size didn't fit. There are paint chips on the back from screw marks. Blackburn Central Seatpost Blackburn Central Seatpost Rear Carrier Brand: Blackburn Material: Aircraft grade 6061 aluminum tube Weight: 748 g Mounting type: Rear seat mount Compatible seatpost diameter: 22-32mm Load capacity: 10kg Purchase price: 14,000 yen Rack deck adjustable front and rear No frame mount required Light & reflector mount loop The Central Seatpost Rack can fit various bike sizes simply by flipping it over. The rack deck adjusts front and rear, so you can customize it depending on the size of the bag you use. With its simple design and easy installation, it doesn't matter what bike you use. Blackburn BRAND HISTORY Blackburn was born in 1975 with the emergence of a new cycling culture on the West Coast of America. The impact that the founder, Jim, and a single cycle rack brought to the cycling culture at the time – it was the introduction of industrial design methodology to the world of cycling. Standing in the riders' perspective, thoroughly engaging with each material. As a result, they created innovations that no one had ever seen before. The products in front of you speak for themselves – this philosophy, which Jim was stubbornly committed to, is at the core of Blackburn's unique and creative culture. A clear vision and hard work to achieve it. All the products that result must be special. Since its founding, Blackburn has always been a new standard in cycling culture. Further innovation to this world –.