by Mike Stone

Michelin truck & off the road tire data book:

• 9.00R16 - Michelin tube 16N9, with a 1-16 or 170-16 Michelin flap, valve stem on tube is # 570 (metal)
• 11.00R16 - Michelin tube 16P9 or 16P, with a 6M16 Michelin flap, valve stem on tube is # 1339 (metal)

From a 1971 Michelin technical data book:
Shows 9.00 and 11.00 16" made in the XS "Sahara" design which was in these sizes "Tube type" at the time as they were fitted to the PW 6.50x16 wheel as PW chassis were in use all over the world.

The later type XL, XZL, XML are all decendents of the "SAHARA" desert tires.

Always check with your Michelin truck /off the road tire dealer