I received new compomotives a month ago; marked as PD 1881 on the invoice. I asked Barry this same question, and here was his reply:
"The PD1880 was the original rim made up until 2012... The tooling was updated to give more internal clearance in 2013 so became the PD1881. All other aspects of the rim are the same..."
"The PD1880 was the original rim made up until 2012... The tooling was updated to give more internal clearance in 2013 so became the PD1881. All other aspects of the rim are the same..."