Which Tyres?

the new Clement is not related to Challenge, and their tyres are made in Taiwan.

A lot of product names have little to no relationship to the original product. In some cases the brandnames are licensed, sometimes purchased and sometimes bought back to life as a kind of squat. Trademarks in contrast to patents need to be defended. If you don't defend them they loose their protection. They also need to be renewed. A number of people see some nice brands that have lapsed and simply register them. Its cheap. A number of brands that claim to be "back" are just these. Others are licensed--- sometimes all that is left of the original brand are the trademarks. Clement? According to the USPTO Pirelli still maintains the trademarks. Donnelly Sports have, in turn, licensed them from Pirelli.
For fun.. just did a check on Wolber.. Seems that the brand was abandoned in the US by WOLBER CORPORATION FRANCE 17, ROUTE DE VILLENEUVE 02205 SOISSONS CEDEX FRANCE. Recall Wolber was purchased by Michelin and sometime in the 1990s they dumped the brand and let it expire before Y2K.. In 2012 LOUGHRAN , David Anthony INDIVIDUAL UNITED KINGDOM 2A BRINCLIFFE CRESCENT SHEFFIELD UNITED KINGDOM registered it.. According to company house.... https://beta.companieshouse.gov.uk/officers/aMVhh-7rhEDGvFEEOvTGC7y5kUU/appointments ... Planet-X.. but it is since marked as ABANDONED.. dated March 5, 2013. Another person could probably register Wolber and bring tyres to the market... (the closest to real Wolbers being FMBs but that is not the point..)...