Always a tricky topic but I wanted to share this interesting test report from Utac Ceram. A rather top end automotive technical service and independent/inpartial under ISO 17025 accreditation (I am not sure if this test was done under the accreditation). https://grippingstories.com/wp-content/uploads/2021/05/210428_BRIDGESTONE-test-report-Motorcycle-tyre-comparison-V2_ENG2_sub.pdf