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17.5 st trailer tire upgrade, j-speed rating???

Dec 11, 2018 at 10:52 PM CST
i am in the process of purchasing a 40 ft flatbed trailer(big tex 22 gn) and the dealership talked me into the beefer 17.5 tire upgrade, with a load rating of h. sounded good to me at the time, but.......

from what i have found online, all of the st 17.5 tires have a j speed rating or slower,
does that mean that i am limited to 62 miles per hour???

are j speed rated tires even worth having considering most highway speeds are70, 75 miles per hour?

is it even allowed by dot?

or should i have gone with a g load rated tire for otr trucking??

please help!!!!
Replied on Thu, Dec 13, 2018 at 08:00 AM CST
from what I just found ya it's 62 mph ....Chinese brand tire I take it?
Replied on Thu, Dec 13, 2018 at 01:53 PM CST
Contential makes a 18 ply 17.5 we use them on our 35 ton lowboy with zero failures. Expensive but worth it
Replied on Sun, Dec 16, 2018 at 06:09 AM CST
16 are all you will need on 22gn