Size Index Metres Millimetres Price (Variations apply)
45 1.8 – 2.1 22 – 25 R380 – R456
90 2.4 – 2.7 35 – 40 R760 – R912
135 2.7 – 3.0 45 – 50 R1140 – R1368
225 3.3 – 3.6 65 – 70 R2394 -R2736
360 3.9 – 4.2 85 -95 R4788 – R5472
600 4.5 – 4.8 110 – 120 R7980 – R9120