Pirelli P ZERO PZ4 is a summer tyre made in total of 338 sizes, ranging from R17 to R17 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 235/50 R20 is 10mm wider than the narrowest dimension (225) and 100mm narrower than the widest one (335). This tyre profile of 50 means the sidewall height of the tyre is 50% of the tyre width (235mm), which results in 117.5mm sidewall height. In 235/50 R20, there is only one possible speed index for Pirelli P ZERO PZ4 - "Y", which is good for speeds up to 300 km/h.
235/50 R20 104 Y
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Pirelli P Zero PZ4 SC ( 235/50 R20 104Y XL J, LR )
Autozeitung Summer tyre test 2023 235/35 R19 highly recommended Ranked #4 of 9Securing a respectable fourth place out of nine contenders, the Pirelli P ZERO PZ4 demonstrated its prowess in the latest evaluation. The tyre was particularly outstanding in the disciplines of dry lane changing and wet circle cornering, showcasing its top-notch capabilities. Reviewers praised the tyre for its dynamic talents and meticulously balanced steering characteristics, lauding its agility and speed in the wet slalom test thanks to remarkable steering precision, clear feedback, and a neutral balance. Despite a high rolling resistance that slightly affected its performance, the tyre's finesse in handling, with slight understeer tendencies during load changes, was notable. On dry surfaces, the tyre's quick and precise steering responses, coupled with it providing crystal-clear feedback and perfectly neutral balance, made it exceptionally enjoyable during rainy weather conditions. Its performance on the wet circle demonstrated solid grip, although it did show some weaknesses in curve aquaplaning. With these results, it earned a final rating of 'Highly recommended,' underscoring its strong performance across various critical aspects.