rk911 wrote:
i did a search for 'Sumitomo Tire Inflation Chart' and got several hits.
If you scroll down to the bottom you'll find a phone number and physical address for the company.
This link includes a tire inflation table. Scroll down a bit to see it.
Hope this helps.
There you have the problem in a nutshell. That address, phone and email is for the US wholesaler, TVC, and the table is for tires which are Sumitomo are from a from a different line. The folks who answer the phone and email for TVC say that all small truck tires, regardless of line or even brand will have the same inflation for a given load. I can't believe that. they aren't able to give any answer but that one and claim that there is no way for me or even TVC to ask the manufacturer for a chart. Frustrating. I'll run them at max for now but they feel like wooden tires. The Sumitomos that they replaced ran at 110 but they were 727's and have their own table.
Enough ranting. I have found an English language site got the manufacturer in Japan and have sent them a polite request. We will see what happens. They make tennis balls, some DUnlop tires and thousands of other rubber things. They even make some tires in the USA. Amazing.
