PastorCharlie wrote:
Considering that all equipment to be equal if the rear brake line is blocked and only the 2 front tires are active:
Adding the back brakes to the active front brakes will increase stopping friction 100%
Adding dual rear wheels will increase stopping friction another 50%
All stopping with the brake pedal depends upon the friction of the tires on the road surface.
If you are not locking the rear wheels stopping a SRW setup (I assume that is rarely the case with 2500-3K on the pin?), then the "extra friction" from the two more tires are not going to make it stop any faster.
So if the physical brakes are the same, as they often are in SRW vs DRW 3500's...and you don't need more rubber to stop the tires from locking up, then where are you gaining braking power?
If anything the extra rotating weight of 2 more rims, class E tires, hub adapters, etc are making it harder to stop.
I think that is what Grit was getting at.