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Has anyone widened their wheels with weldcraft wheels? If so I have the stock 18x8.5 bullit wheels and was wondering how much wider I can go? I measured and it looks like I can probably go up to 10 without any rubbing or extenders. I would like to verify with someone who has done it to their car, thanks.
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Sorry, haven't done it myself, but I do seem to recall that the Roush 18x10" wheels use a +45mm offset.
So long as the folks at Weldcraft return them to you with that spec, I don't see any special problems. I would confirm the offset figure with them, because if they're just welding on a ring to the back portion of the hoop, your offset is going to be huge and you'll be running into interference problems.
"We accelerate from corners, not christmas trees, and the length of our drag strip is dictated by the distance to the next braking area." -Carroll Smith
Thats what they will do, attach a ring in the center making it wider. What is wrong with more positive offset? I measured from the inside of the wheel to the shock and it will clear, at 10 inches.
By the way your car is cool, mine is the same color.
Thanks for the compliment! But wait until next summer when the new hood goes on...=)
Generally, a suspension system is designed to work with a specific range of wheel offset to run optimally. Deviate far from this and you start to place additional stresses on ball joints and other components as well as induce more tire scrub. Can you run with non-optimal offset? Sure. Will it be noticeably bad if you were to go outside this range? Depends on what sorts of things you are capable of noticing. Lots of folks live with non-optimal set ups and just deal with the consequences (consciously or not).
If you're not familiar with basic suspension geometry and can plot out the current system to know what impact the additional offset will be, then I'd just stick within range of what we know works well. That would be +45 to +50mm offset. Again, people have run (and run hard) with +35mm offset, but I would say that's max before you start to get some fairly adverse tire wear. I haven't heard of anyone running over +50mm offset.
As far as your measurements, I would ask how you took the measurement. Did you verify that an additional inch and a half will clear the strut, tie rod, and control arm through the entire range of motion? You need to clock the wheel side to side and do so while running the car through full drop and full compression. I'm somewhat doubtful that it will clear, but hey, I haven't checked it myself so you may be right.
I could also be wrong about the following, but I believe that simply adding rim width to the back side of the hoop directly adds half of the addition to the wheel offset. So that's an additional 3/4" to the offset, or an additional 19mm. The 18x8.5" bullit wheel has +50mm offset, so tacking on the addition brings the grand total to +69mm. That's way out of spec for the original design, and again I'd just be amazed if it fits through the entire range of motion.
Ask around, check my math, and see what you come up with.
"We accelerate from corners, not christmas trees, and the length of our drag strip is dictated by the distance to the next braking area." -Carroll Smith
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wheel widening how wide?
