On a light truck tire' F' is a 12 ply load rating. This is only part of the information because you have chosen NOT to give us the whole tire number. we need all info to give a correct answer.
That's a rating for how well the tire tread wears - the higher the rating the more miles you can put on the tire before it needs to be replaced
108=the load rating per tire is 2205 lbs S=the speed rating on this tire is 112 mph
F on a tire is not the size. In fact I have never seen F on a tire to designate anything.
H speed rating is 130 mph maximum.
how much weight you can put on it.
specification Speed rating.
107 is the load rating of the tire the S is the speed rating and the rwl is raised white letters.
The H is the speed rating. The H rating means the tire has a speed rating of up to 130 mph. http://www.tirerack.com/tires/tiretech/techpage.jsp?techid=35
It's a speed rating, in this case meaning 'up to 130 mph'.
That is the speed rating of the tire. H is rated up to 130 mph.
Steel Radial Speed Rating
The 93 at the end of your tire designation is the 'Load Rating' -in this case, 650 Kg per tire (1,400 pounds) The 'W' is a 'speed rating', usable to 168 mph. -This sounds like a tire from a large, fast SUV.