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PostPosted: Sun Sep 03, 2017 5:44 pm 
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5th Gear
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I had new wheels made and I received them last week. They're Forgestars, so they are produced uniformly in large batches and then the hub-mating surface is machined down based on the offset that you want.
3 of the wheels look to be machined nicely with uniform flat surfaces, but the 4th one has a diagonal line where the machining was messed up. One side of the line is high and the other side is low (so it's not just an elevated ridge, but rather an uneven end to the machining process).
As a result of this surface not being perfectly even, the wheel doesn't sit flat against the hub (whereas the other wheels do).
Image
It's not off by an inch, but I can easily slide paper where paper shouldn't be able to slide
I'm concerned that if I torque down this wheel I'll be putting stress across this fulcrum. Combining that stress with driving them hard on sticky Hoosiers... I really don't want to have a wheel fail at speed

You can see it here: https://youtu.be/DtFbsgsA--8

Experienced people - is this something I should be concerned about on a new wheel? Or should I torque it down and forget about it?
Thanks

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PostPosted: Sun Sep 03, 2017 7:13 pm 
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I wouldn't accept them. If it's not sitting flush, it's going to want to bend (or will bend). And that's not going to end well.

Plus there's the consideration that you had the wheels made, which means you paid extra, and that's the amount of QA that wheel was given? Not cool.

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PostPosted: Sun Sep 03, 2017 9:23 pm 
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5th Gear
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If it was a used wheel I'd take it to a machine shop and have it skimmed off by about 0.1-0.2mm, would be a very simple setup for them and reasonably cheap to have done.

But for a new wheel, I'd want it replaced. Maybe it would never cause a problem, but you paid for a custom set of wheels.

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PostPosted: Mon Sep 04, 2017 11:12 pm 
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The clamping force needs a consistent amount of surface contact to keep everything positioned. I wouldn't run it. Return it.

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PostPosted: Tue Sep 05, 2017 7:55 am 
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+1 what Scott said. Not hard to chuck that and check it for true, then take a skim off of it.

As for returning, I'll leave that to you and your provider of parts.

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PostPosted: Mon Sep 18, 2017 10:17 pm 
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5th Gear
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Joined: Mon Sep 15, 2003 11:25 am
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Location: Moncton, NB
Thanks for the input, guys
New (free) wheel is incoming
Customer service from SimplyTire in Ontario seems to be quite good so far (other than the fact that they don't quality-check wheels before shipping them to customers)

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