Whats the difference bewteen the 19x18 and the 19x20? Thanks
The first number is the piston diameter. 19mm
The second number is the piston offset. The distance from the lever pivot to the piston. 18mm in this case.
The two most popular Brembo's are the 19x18 and 19x20. Both have a 19mm diameter piston but the offsets are different.
The 18mm requires less lever force but provides less feel.
The 20mm requires more lever force but provides more feel.
Hope that helps.