IDing A 11 inch BBP Drum Backing Plate

ethan santin said
Ethan,

Are you measuring the backing plate straight across from edge to edge? FYI, the measurement of 10 or 11" comes from the drum not the backing plate. If you measure edge to edge and it is 11" then that is for a 10" drum. You may have small bolt pattern 10" drums, otherwise, if BBP look hear at post #8.

72bluNblu said
Also, if you have a set of 10" backing plates without any hardware, shoes etc you can measure those to determine if they're BBP 10" backing plates or SBP 10" backing plates. BBP plates will measure 1.75", they're 10x2.5" and have the same axle flange offset as the 11x2.5" brakes so you get the same measurement. The SBP 10" backing plates will measure roughly 1.25"