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Old 01-13-2017, 04:10 PM
Dmitry at Pelican Parts Dmitry at Pelican Parts is offline
Join Date: Mar 2016
Location: Los Angeles, CA
Posts: 1,984
Wheel Fitment and Spacing Guide

Hello Fellow Pelicans

I've come across a lot of members who are asking, "Hey! will these wheels will fit my car? or "I found a set of _____,what offset should I be looking at?" or "Just got a set of ____ and now I have wheel rub what do I do???" - These are all very important and valid questions to ask when building that perfect car! Not to worry because we here at Pelican got you covered!

I've included some useful info below, but for the our extensive article, check out Wheel Fitment and Spacing.

Please feel free to suggest anything that you've found useful in your own experience.

Clearance: Maximum wheel width is limited by fender and suspension component clearance. In order to select the proper clearance, you will first need to know the distance from the mounting pad to the inboard lip, this is called backspace. With the backspace figured out, you also can figure out your offset using the chart below:

Spacers: Letís say you found a wheel/tire combo that safely clears everything and looks better aesthetically but you want to either have a little more suspension clearance or bring the wheel a little more square with the fender line. Spacers are a great way to safely accomplish this. Spacers are machined disks that attach to the suspension hub and move the wheel toward the fender line. Using our wheel width example from before, after fitting our new 18x8.5 ET40 wheels, we noticed that even with our increased width we are still not as square to the fender line as we would like to be. Measuring the distance from the fender line to the wheel, we find we have about 16mm of space between them. Using a 4mm spacer, we can move the face of the wheel closer to the fender line, gaining a squarer 12mm clearance between fender and wheel as well as gaining an additional 4mm of suspension clearance.

Custom Offset Wheels: While spacers can be very useful in dialing in a wheel set up, in very large changes of offset it is often a wiser solution to have your wheels customized with an offset tailored to your use. Bolt-on hub spacers have been known to loosen from the mounting hub, so having a custom wheel with the offset provided by the spacer already there can increase the safety of your wheel setup. In addition to changes in offset, custom wheel manufactures can also change factors like wheel diameter and width, the material used, cast or forging process, monoblock or multi piece construction and many other options to give you a truly one of a kind wheel.

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