Just like the title says. My car came with Rota slips and I hate the way it yanks the steering wheel around when I go over grooves in the road or uneven surfaces. If you're gonna give me some hella flush -30 offset on a 6" wheel answer, please don't reply. I want to know what stock offset is so that my scrub radius isn't retarded

 

Offset isn't your problem.

Your problem is your alignment.

 

And what is a scrub radius?

 

True. The wheels are not the problem here.


The scrub radius is the distance in front view between the king pin axis and the center of the contact patch of the wheel, where both would theoretically touch the road. The kingpin axis is the line between the upper and lower ball joints of the hub.




As for the stock setup, you're looking at a 14 or 15 inch tall wheel, 6 to 6.5" wide, with a +45 offset. However, as I stated earlier, they are not causing the bump steer. It's an alignment or suspension issue.

 

Thanks for the info Matt

 

Not trying to be a dick, but you're both wrong. Anybody else?
I recently had an alignment done and the front wheels are pretty much dead straight. .5* negative camber and the slightest bit of toe in. Regardless, I've had these wheels hanging around for a long time. The first car I put them on was a '99 civic hatch that I bought in '01. It was practically brand new with only 30k miles on it. It felt perfectly fine with the stock steel wheels and follows grooves with the Rotas. That being the only change. It's night and day.

And since we all know what scrub radius is now, let's use our imagination a little and think about how offsetting the wheel centerline to one side of the ball joint steering axis can cause leveraged forces against the steering, especially when encountering uneven pavement.

 

So...how old are your tires? When is the last time they've been balanced? Properly inflated? How is the tread? Did you get an alignment with those particular wheels? Do you have a manual or power steering rack?

Oh and by the way, you say your car came with the wheels

And now you're saying you've owned them for a long time.

Which is it? Your story is not adding up.

 

It's not bump steer. It doesn't do anything weird over uneven elevations, it's more just groove and rut following like the steering axis is being leveraged on. Also, I should note that the overall tire diameter is pretty close to stock.

Sorry, I was just trying to simplify the original question. I got the wheels a long time ago for a 99 hatch. That car got wrecked a few years back and recently got a '00 hatch that I had to put these wheels on to drive home.

tires are relatively new, got an alignment when I got them, balanced at the same time, manual rack. I've probably had 4 sets of tires on these wheels over the course of time and they felt this way on the old civic with power steering and on this civic without. If I slowly change lanes on the highway and let go of the wheel, it will jerk around a little on it's own when crossing the uneven grooves between lanes. It's super annoying. A long time ago, (1999 or so) I had a different set of rota slips (probably same offset) on my '89 crx and they felt the same way.

 

The way you had described the problems experienced in the first post, made it sound as if you were having issues when hitting bumps. Since you mentioned that the car has a manual steering rack, that can exacerbate issues experienced with a stickier tire on a car without any form of steering stabilizer. A powered rack will reduce the effect, and having a damper on the steering arms would be even more effective.

Waywardness is a comment symptom for lifted trucks, and they tend to have a mind of their own without serious steering stabilizers.

 

did the same thing on my last car with power steering. I bet if I put a set of stock 15" honda wheels on it, it would be fine.

 

My car has had that issue with tracking over grooves with a few sets of tires over the years. Assuming bushings are all good and alignment is good, I think stock offset is 40mm or 45mm on stock wheels. What is the size and offset of the wheels in question?