don’t skip this
I’ve seen a lot of buggy builds come through and the front-end alignment is almost always the last thing people think about, or they skip it entirely. Then they wonder why their car darts all over the place, wanders at speed, or gets a shimmy going that scares the daylights out of them. Most of the time it comes right back to alignment. Let’s go through it.
Caster is the inclination of your kingpin or ball joints relative to each other. Top leaned back behind the bottom is positive caster, and that’s always what you want. It’s what makes your steering return to center after a turn and keeps things tracking straight down the road. Stock VW runs 3 to 3.5 degrees, which is perfectly fine for a standard Beetle at normal speeds. But you’re building a buggy, shortened wheelbase, driving faster, and that stock setting isn’t going to cut it. You want 5 to 6 degrees positive caster. Most quality buggy frames like Berrien already have 5 degrees built in, so you may be good to go right out of the gate.
To check it, make sure the car is on a level surface with all four tires on the ground and properly inflated. This matters more than people think. You need a straight edge about 12 inches long and a digital protractor or inclinometer. Place the straight edge vertically between the upper and lower tubes on the beam, zero your protractor, set it on the straight edge and read your degrees. Simple as that.
If you’re working with a shortened stock pan you’re probably sitting at 3 to 3.5 degrees and need to add some. Jack the front up under the frame head, not the beam, and loosen but don’t remove the four bolts holding the beam to the frame head. Slide your caster shims in between the lower tube and the frame head, snug everything back down and re-check. You’re shooting for at least 5 degrees, no more than 6. One more thing: it doesn’t matter if your frame is level, nose up or nose down. Caster is the relationship between the kingpins or ball joints and the road surface, not the frame.
Camber is how vertical your wheel sits when pointed straight ahead. Factory spec is zero degrees, perfectly straight up and down. A slight negative camber, around minus half a degree with the top of the wheel leaning inward, is acceptable and actually works well with wider modern tires. To measure it, place your straight edge vertically against the rim, the rim itself and not the tire sidewall, and put your protractor on that. Whatever it reads, that’s your camber.
How you adjust it depends on what front suspension you’re running. Ball joint front ends use an eccentric adjuster at the top ball joint. Look between the upper suspension arm and the spindle and you’ll see a large hex nut. Turning that moves the top of the wheel in or out until you hit your target. It’s pretty straightforward. Link pin and kingpin fronts are a different story. Camber is adjusted by moving shims on the link pins from one side to the other on the carrier, which means pulling the wheel and some brake components. It’s not terribly difficult but there are enough steps that you’ll want a VW service manual in hand before you dig in.
Toe is the relationship between the front and rear measurements across your tires. Stock spec is 1/8 inch toe in, meaning the fronts of your tires are 1/8 inch closer together than the rears, slightly pigeon-toed. On hard surfaces this keeps your tires tracking straight and true. Toe out does the opposite and will have your buggy wandering all over the road. You might hear guys running the desert or dirt ovals say they run toe out, and they’re probably telling the truth, but that’s for loose surfaces and has no business on your street buggy.
To measure, car sitting on the ground with all four corners down. Mark the center of the tread on each tire so you come back to the exact same spot every time. Take your measurements at the 9 o’clock position on the front of the tire and the 3 o’clock position on the rear, and use the same tape measure for everything. The total difference between the two measurements is your actual toe. For example, 50 1/16 inches at the rear and 49 15/16 at the front gives you exactly 1/8 inch toe in. If you prefer to use toe plates bolted to the wheel studs with tires removed, just make sure the suspension is loaded and that your measurement points are the same distance from the spindle center as the outside edge of your tire would be.
None of this is overly complicated. It takes a little time and patience to do it right, but at the end of the day you’ll have a buggy that actually drives the way it’s supposed to, and that makes all the difference.
– John Mickle







































