The Brake Master Cylinder RCS 19 1 inch is one of the most recognized products in Brembo’s RCS brake master cylinder family. Brembo states that the classic RCS brake master cylinder features a 19 mm piston and an adjustable lever ratio of 18–20, allowing the rider to fine-tune braking feel for a more reactive or more progressive response. Brembo also notes that the 19 RCS introduced variable ratio adjustment to the market and became a major reference point in the evolution of aftermarket radial master cylinders.
This makes the RCS 19 a strong option for riders who want premium braking confidence, race-inspired engineering, and more direct lever feedback. As above, I am keeping the “1 inch” wording only as part of your listed product title, since the official sources I found confirm the RCS 19 and its core features but do not clearly verify that exact “1 inch” naming on the public pages I reviewed.
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