Stig
Tame Racing Driver
what is the difference in the PR3 and the PR3-B,
From the Michelin website: "180/55 ZR 17 rear also available in a 'B' version, specifically designed for loaded sport touring or riding two-up." I believe the sidewall is stiffer to better handle the extra weight associated with 2-up riding. I always ride solo so no issue with the non B-spec version.