Ritchey Aero OCR Pro wheel rim, hailing from the United States and in production during the 1990s (yet still new & unuséd after all this time!). Made from aluminium and weighing in at 440 grams (the weight and price displayed are for one rim, if we have more in stock you'll be able to add them to your basket) - pretty lightweight for a rim at that time. A fine choice for keeping your classic bike authentic, but also great for any other compatible bike. 'Off centre rim technology' features an assymetric spoke pattern that requires less dishing, allowing the rear wheel on a geared bike to be built with a more balanced tension than a traditional rim. Technically these could be uséd on the front but they are designed for rear use. .