On the real tire, there are some little parts of the tread that wrap down around the edge of the sidewall, to give extra grip when the tire is buried deep in the mud. So far, we just have a tire with pretty blocky treads on it, not very realistic! To fix that, we can create a that passes vertically through the tire, and create a sketch in it to trim off the edges of the tread that we don't want, like shown here. If you look carefully at the original tire you can see it has 12 of the big tread sections, so create 12 instances in the pattern. Once the tread section is created, add a central axis to the tire (under insert, reference geometry, axis) and then create a circular pattern of the tread, using the new extrusion as the pattern and the central axis as the parameter to rotate about. Make sure you select "merge" or the tread piece won't be part of the tire! I use extrude, direction 1 = blind, distance = 29/32", direction 2 = blind, distance = 5" For direction 2, you can use whatever distance you need to make sure the tread is part of the tire. The tire specs page gives a tread height of 29/32, or almost 1". You should get something that looks like this.Īfter the tread is drawn, we extrude it. This is most easily accomplished by looking at the tire tread you are trying to copy, and deciding how big each piece should be in relation to how big the tire is.
![iron cad assembly iron cad assembly](https://i.ytimg.com/vi/drx9Z_smwVc/maxresdefault.jpg)
This gives you a plane that is tangent to the surface of the tire.ĭraw the first part of the tread in the plane. Next, create a reference geometry plane that is coincident with the endpoint of the centerline, and perpendicular to the center line. First, create a center line from the center of the tire out to the edge, in the plane of the inside face of the tire (where the two halves should join.
![iron cad assembly iron cad assembly](https://pbs.twimg.com/media/E0DXDunUYAIkpNz.jpg)
Since this tire has three separate pieces to the tread, we will draw in in three separate steps.