Primo is a BMX company from Southern California that makes parts. They have had many legendary parts such as Stricker pedals, dirt monster tires, hollow bite cranks, and the mix (or older pro version) cassette. Many believe the Primo cassette is the best in general, if not in comparison of quality/cost. Many also believe they have the strongest pivotal seat, meaning the base, so it does not limp in the front like many other pivotals. These are quality products that have been around for a long time. That kind of experience creates quality, naturally.