Uneven Drag Radial wear

Swansonic · 01-03-2024, 12:50 PM

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 · 01-03-2024, 02:54 PM

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 · 01-04-2024, 05:45 PM

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

Swansonic · 01-04-2024, 07:40 PM

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 · 01-05-2024, 01:09 PM

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.

01-03-2024, 12:50 PM	#1
Swansonic Junior Member Join Date: Aug 2015 Location: Alberta Posts: 4 Likes: 0 Liked 1 Time in 1 Post	Uneven Drag Radial wear 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. __________________ Mike Swanson

01-03-2024, 02:54 PM	#2
cad Senior Member Join Date: Apr 2009 Location: Omaha, NE Posts: 673 Likes: 141 Liked 72 Times in 40 Posts	Re: Uneven Drag Radial wear 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.

01-04-2024, 05:45 PM	#3
Larry Hill Live Reporter Join Date: Oct 2004 Location: Hickory, Ky Posts: 10,281 Likes: 1,637 Liked 9,457 Times in 1,958 Posts	Re: Uneven Drag Radial wear I would guess the ware is taking place in the water box with the 152 lbs more on the DS. __________________ IHM Used Parts https://ihmusedparts.com 888-821-1817

01-04-2024, 07:40 PM	#4
Swansonic Junior Member Join Date: Aug 2015 Location: Alberta Posts: 4 Likes: 0 Liked 1 Time in 1 Post	Re: Uneven Drag Radial wear 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. __________________ Mike Swanson

01-05-2024, 01:09 PM	#5
Myron Piatek VIP Member Join Date: Nov 2001 Location: Florida Posts: 1,538 Likes: 34 Liked 132 Times in 48 Posts	Re: Uneven Drag Radial wear 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. __________________ LOCOMOTION Racing