Quote:
Originally Posted by nacnac
They don't look concave from the pics. Are they just part of the concave series or Is it because of the offset you have or the pictures just don't show it?
I'm looking for wheels now and I'm finding to get a concave wheel , the offset can only be in a small range. Or they call them deep concave which is actually concave or shallow concave which is really no concave.
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All of our Concave Series wheels are available in your choice of either deep or shallow concave profiles. Obviously, the shallow profile does not have much concave angle to it.
There are several situations where the shallow option comes in very handy. Most importantly in cases where the hub placement relative to the body requires a really high offset. Obviously, we can't change where the hub or fenders are located, and the concave angle consumes some of the available horizontal space. So if the center of the wheel is fixed at the hub, but the hub is already very close to the fenders, then the concave spoke angle will push the rim register out toward the fenders, potentially going beyond the edge. (We have a few customers who prefer this skateboard look, because they'll do anything to get more track width and traction. But as a rule of thumb, sticking out past the fenders is generally not acceptable.) So the shallow concave allows us to fit the wheel into these high offset applications with limited space. On a pro-touring car, this is seldom an issue in the rear, but it is often an issue in the front.
The other situation that we encounter often is the tradeoff with the outer lip width. Obviously, holding the width of the wheel constant, and assuming that the center of the wheel is dictated by the position of the hub, then we only have so much space to go outboard. And because the concave spoke angle consumes some of this available space, whatever space is consumed by the concave spoke angle must be subtracted from the width of the outer rim. So if you are trying to max out the outer rim lip width, then you might opt for the shallow profile to get more outer. Again, this is seldom an issue in the rear (because most pro-touring cars have lots of rear lip already, in the rear), but this is often an issue in the front (where space tends to be more limited). So we actually build a lot of sets with deep concave in the rear and shallow in the front.
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