|
Load index is combined weight + speed rating on heat-buildup and stability. It's how much weight it can carry and shed heat fast enough to be stable at rated speed. So MT75 120/80-16 has 60T load/speed rating. It will reach maximum safe temperature at continuous 118mph while carrying 551-lbs of load.
If you're not going to be riding at 118mph all the time, tyre will actually be cooler and can carry even higher load at limit temperature. Of course, actual load will be lower and you'll be even further away from limit. There are many other tyres in this size with 60H and 60V ratings for 130 & 149mph speeds while carrying same 551-lb load. Carrying it at MT75's 118mph limit is piece of cake for them with a lot more overhead.
Don't overthink it, load-rating doesn't have any relation to safety on bikes. Situation awareness and reflexes are most important to staying alive. As far as tyres, grip is more important than load-rating. So go for more modern tyre design and compound with better grip than MT75.
|