What kind of gear were you wearing when you went down at < 25 and suffered such bad road rash? I hope you were wearing some protection being so concerned about safety with your tires. Any pictures of the resulting damage to your gear.
Sorry it happened to you and I hope you do well with the tires you just mounted and that they don't suffer a blow out under acceleration and cornering load from being run too close to the max rating. Don't know how to figure the distributed load under those conditions. Most shops won't even mount a tire if it doesn't meet proper fitment.
Actually, most shops WILL mount the tire. A BMW dealership might not, but most performance shops will and moreover, I was up front with the question to the three shops I called. None had a problem with it.
I DO (really) appreciate your concern, but with due respect. I disagree with your characterization that I am operating too close to the maximum load.
I've already stated that I ride typically with no more than 200 pounds. The 600 pounds of load the bike is intended to carry is not something I will ever do. If you are carrying the maximum load, I suggesting sticking to the required load ratings. I have chosen to de-rate my load and will NEVER carry that kind of weight and will operated withing my new limits. So for me, I will never carry more than 420 pounds including myself.
Disclaimers aside however, the type of failure you are describing with acceleration isn't what stresses a tire. You can never really apply more than 1 lateral G or about 0.5 forward acceleration on to your tire. It also assumes that the load rating has no margin for safety (which it does). The thing that REALLY stresses tires is Centripetal acceleration.
Do you know what the centripetal acceleration is at 168 MPH? It exceeds 1700 G's!
168 MPH is 75 meters per second. The radius of the outer belts on our tires is 0.33 meters. The Centripetal acceleration of a tire rotating is (V^2/R). The belts in tires (especially V and W rated tires are REALLY, REALLY, REALLY strong). Their tensile strength is beyond incredible.
At 75 meters per second, the outward acceleration is (75 * 75) / 0.33 = 17,000 Meters per second squared or more than 1700 G's!
In fact, the load rating includes running the tires at those loads at the rated speed of the tire (168 MPH!)
That's what this tire can take while carrying a load of 783 pounds!
The wimpy driving that I do is a tiptoe through the tulips.
The W rated Road 4 GT should be FAR stronger and more durable than an H or even a V rated tire with a heavier load rating.
Given that I ride no faster than 75 MPH (usually 50) and that I will be carrying on average, 400 pounds less than the bike is rated to carry, this is a bit of a NO BRAINER. I am frankly a bit confused by the response to my "daring" to look for a better tire...
I have confidence in my choice given the superior compound and the more advanced belt technology in my tire choice.
As for what I was wearing and why I was hurt so badly, I admit that I could have chosen better protection for myself and it won't happen again. Fortunately, I was wearing a helmet but as for rest...
Here in Colorado, most people don't even wear helmets (not required). I feel a bit goofy even wearing a helmet in this State while everyone else is in a T-Shirt, sunglasses and shorts.
Given how painful the fall was, I will be wearing armor from waist up and chaps from waist down from now on - irrespective of how goofy I feel.
I too was surprised at the level of my injuries. In my defense, the fall was so unexpected. I never had time to brace of it. I was enjoying myself one second and the next one I was tumbling.
The bike literally felt that it was on ice and went right out from under me. There was no painted line that I went over, just wet asphalt at a temperature of about 45 F.
So, if you are riding in wet and colder conditions, perhaps THAT might concern you more than the ability to carry a mythical 963 pounds over your rear wheel at 149 MPH (V) (something few of us will ever even think about doing).
Riding on wet, cold roads is something we will all find ourselves facing at one point or another; I prefer to address the issue most likely to cause me to fall again - cold, wet, mountain roads.