Moving RR in

[dchamp3]

Barry Wright lines the left sides up ,but we changed ours moved left in a little.

[drtrkr244]

Adding spacer to left rear definitely tightens car through the whole corner.When you space out the left rear, you have widened the rear track, which keeps more weight on the lr on exit.This works so well Rocket and Mark Bush recommend this at all times for Rockets.

[7uptruckracer]

The LR rear Spring and Wheel spacing wise only really does anything on exit everywhere else your for the most part dealing with the handling based off body roll and hike, roll steer, as far as weights your weight is transferring rear to front and inside to outside so the LR is the big loser weight wise so the spacer doesn't really effect anything entry to middle Nearly as much as exit. I agree the Wheel spacer is an effective and useful change to tighten exit especially now that they are doing so much geometry wise to get the cars to keep turning in all conditions and the Wheel spacers eliminates as many compromises as possible which is what we are all after

[fastford]

i never run the left rear out of line with the left front, although ive tried and didnt like it, its almost like a crutch, but heres how i look at it, if you have ever rode a 3 wheeler, where the left rear tire is out farther than the front , then you know you have to lean way to the right to turn left, if you lean left any at all then even though you are turning the wheel left , its going to turn right like master built stated above , i think tracking is more important than trying to gain a little dynamic wedge by moving lft out, on todays set ups, there are a lot more ways to gain foward bite than using a spacer, JMO

[MasterSbilt_Racer]

i never run the left rear out of line with the left front, although ive tried and didnt like it, its almost like a crutch, but heres how i look at it, if you have ever rode a 3 wheeler, where the left rear tire is out farther than the front , then you know you have to lean way to the right to turn left, if you lean left any at all then even though you are turning the wheel left , its going to turn right like master built stated above , i think tracking is more important than trying to gain a little dynamic wedge by moving lft out, on todays set ups, there are a lot more ways to gain foward bite than using a spacer, JMO

I used to use spacers all the time on almost any wheel. Now I never consider it. Like you said, there are just a limitless number of things to adjust today.

[7uptruckracer]

Most all the new rockets minus the black runs it standard, I haven't really looked at all the geometry to see why. Even Mark brought its use up I know some of their newer cars look to have a lot of bar toe in and the wide front maybe it's to keep drive without adding hike if your going up your wasting thrust to go forward, who knows some of the Team Zero cars use it to I know he did say they really cracked down on making sure on the touring level the right width LR wheel was being using that its a big advantage with drive in the slick there, food for thought maybe

[Matt49]

Most all the new rockets minus the black runs it standard, I haven't really looked at all the geometry to see why. Even Mark brought its use up I know some of their newer cars look to have a lot of bar toe in and the wide front maybe it's to keep drive without adding hike if your going up your wasting thrust to go forward, who knows some of the Team Zero cars use it to I know he did say they really cracked down on making sure on the touring level the right width LR wheel was being using that its a big advantage with drive in the slick there, food for thought maybe

Additional food for thought on the Team Zero part of this...
A few years ago I was in the pits at Florence and stopped to say hello to Bloomquist. Some wheels were laying out next to the car and I noticed the EXTREME offset of the LR wheel.
I said, "My God, what offset is that wheel?". His reply..."2 inches".

[DLM06]

In my experience adding a spacer to the LR does not add drive, wedge or weight to the LR. The spacer adds side bite and reduces wedge. Whenever a spacer is added to the LR you need to add a couple of turns to get the wedge back to what it was before the spacer. As far as the LR rim being closer to the ground when the car is jacked up, that is what I would expect since, if you have wedge in the car, the LR is going to be angled toward the ground. Adding the spacer gets it closer.

Adding the spacer and increasing the side bite would be felt until the car got totally straight.

[7uptruckracer]

It was my understanding they aren't allowed to do that anymore with the actual rim and tires from Mark but IF your local track doesn't check it to try it and see how it reacts to your car. Like anything I'm sure it's a package deal. If you can use that to make your car drive straighter off the corners and hook up better then you can take some upward thrust angle out elsewhere and if your not using all that thrust and upper bar angle to hike the car and create drive you can use it to push the car forwar,d I can see where it has its place. I don't pay attention to the LR much as far as any of the dynamic wedge. Your weight is transferring away from the LR until your getting back on the car the bars and shock package are doing all the work until you pick the throttle back up and weight starts to transfer back. Just my opinion its something I use when I want to tighten only exit on some of my cars.

[Dragoon55]

Its all about the Polar Moment.

I hate to tell you this but adding a wheel spacer to the lr will NOT add drive. It will tighten entry and loosen exit.

Sorry, but you have this backwards. 2" wheel spacer to LR tightens exit because it gives the LR more leverage on the polar moment of the car. Essentially you are giving the LR a longer handle to effect the car with. Also adding a 2" spacer or any spacer to the RF will tighten the car through out corner. On dry/slick we usually space LR & RF together on swingarm car for best result. On 4 link I think 2" LR would be just right for tightening exit, but you can try a 1" and see if thats all you need. Now in kart racing we did the reverse in the rear, but that is a whole nother kettle of fish.

Moving the lr wheel out does take weight off of it if no other adjustments are made. It also moves the center of the thrust generated by both rear tires to the left. The farther to the left that thrust is, the more the car wants to turn right. What wins out depends on quite a few factors.

This guy knows, he just calls it thrust instead of leverage.

[crewchief32]

No I definitely don't have it backwards.