ah RTFM may help:
http://www.siaecosys.com/upfile/201909/2019090263764705.pdf
"Speed specification, can be adjusted according to customer tire model before shipment"
perhaps that's the reason why they quote this precise tire-ratio figures in their ads?
... just another question for carries list ....
http://www.siaecosys.com/upfile/201909/2019090263764705.pdf
"Speed specification, can be adjusted according to customer tire model before shipment"
perhaps that's the reason why they quote this precise tire-ratio figures in their ads?
... just another question for carries list ....