Division 7.1.5.1.4 The coefficient ‘b’ is:F1 Original text. Later amendments are not shown. Radial tyres Diagonal (bias-ply) and bias belted tyres for normal use tyres 1,04 1,08 Annotations Textual amendments F1 Substituted by Council Decision of 13 March 2006 amending Decisions 2001/507/EC and 2001/509/EC with a view to making United Nations Economic Commission for Europe (UN/ECE) Regulation Nos 109 and 108 on retreaded tyres compulsory (2006/443/EC). ← Division 7.1.5.1.3 Division 7.1.5.1.4 Division 7.1.5.2 →