What is the right PSI on Drag Radials ?

[06MangoDaytona]

I'm going to Mason-Dixon Drag way for their final Test & Tune of the year and this time I have drag radials I'm going to run spare tires up front and I'm not sure how to set the PSI on this set up.

The Drag Radials are BFG G-Force and the size is 275/40/R17 and the spares are stock size T145/80/D18. Also do I need to change my wheel/tires size with my predator or will it make a difference ?


Thanks guys

[06MangoDaytona]

Anybody run this set up or have any input ???

[Keavdog]

15-20 on the backs, try staring at 18. 40 up front.

It is also important to remember that the g-Force T/A Drag Radial operates most efficiently on the strip at cold inflation pressures of between 15psi and 20psi (in no case should below 12psi be used). And after the racing is done for the day, it is essential that the g-Force T/A Drag Radial be reinflated to normal highway operating pressures before carrying the driver and trophy back home. Running any tire at relatively low inflation pressure for a given load reduces the tire's speed capability by causing it to stretch more and operate at a high deflection (more radial bulge). The g-Force T/A Drag Radial is built to withstand brief "bursts" of high speed while inflated at low pressure (such as would be experienced on a quick car in the quarter-mile), but no tire can be expected to survive for a long time at high speed while operating at high deflection.

[06MangoDaytona]

Thanks for the help I didnt get to go but I'll keep this info for the next time I do