Uneven Drag Radial wear

[Swansonic]

2002 S10 extended cab (PRO ET) with complete Calvert rear suspension, Moser M9 with 4.11 and spool.
After 240 runs the 275Pro DR are now replaced with 28x10.5x15 PBR.

The drivers side 275 had surprisingly more wear than the passenger side.
Tires are at 20# air and the Caltracs are 1/2 turn tight, shocks full loose.
Trans brake 3300rpm 2step, low HP LS 6.0L, TH400 running 11.50 117

Weights with driver 3452
DF 1057, PF 964
DR 791, PR 639

Weight with out driver 3238
DF 950, PF 942
DR 694, PR 651

Any thoughts why the drivers side has more wear with a spool?

Tires never moved on the rim.
Truck leaves and drives perfectly, dead hooking all the time.

Debating on adjusting the bars to even the weight while on the scales and adding/moving some weight.
Just surprised with the different wear with a spool.

[cad]

Are you setting up the bars with the driver in the seat? What are the corner weights? I dont think you will move much, if any, weight by adjusting the bars. It did little/nothing on my car for moving weight on the scales.

[Larry Hill]

I would guess the ware is taking place in the water box with the 152 lbs more on the DS.

[Swansonic]

Thanks for the replies.
I had read that the water box could be where the extra force (weight) would be on the drivers side tire and during the launch the torque moving to the right would help balance the weight across both tires.
I'll move/add some weight to the RR and see what happens.

[Myron Piatek]

Unless it's specifically recommended not to by the manufacturer, you can always swap tires from side-to-side after every race weekend to help even out the wear. I did that with my leaf spring only suspension and checked/adjusted my rear drum brakes while I was at it. It evened out the wear very well.