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Wheel offsets and spacer plates |
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Dawg 
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Joined: 15 August 2009 Location: Canada Status: Offline Points: 988 |
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 Posted: 29 June 2011 at 11:29am |
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hehehehe....If you bring flowers you'll get a hug.....<blush>
The Dawg
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You dream it up....I'll make it
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Car-2-Lo
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Joined: 14 February 2007 Location: Canada Status: Offline Points: 1266 |
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Posted: 30 June 2011 at 7:44am |
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That's not all Damien, now the club want us to sit together 
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Car-2-Lo
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Joined: 14 February 2007 Location: Canada Status: Offline Points: 1266 |
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Posted: 30 June 2011 at 10:22am |
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Hey Patty, Brian has really nice 17"s for your ride, they will look and perform better than those girly wheels
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Patrick
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Joined: 19 April 2008 Location: Vancouver Status: Offline Points: 5 |
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Posted: 20 July 2011 at 12:43am |
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Car-2-Lo
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Joined: 14 February 2007 Location: Canada Status: Offline Points: 1266 |
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Posted: 20 July 2011 at 7:57am |
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No Patty, if you want performance for autocross get your self decent light weight racing wheels with proper offset !
If you want looks only (like me  ), then go with US Alcoa 6061t6 billet aluminum.
Those for $75 does not say "made in USA" ? |
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Patrick
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Posted: 21 July 2011 at 2:54pm |
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Patrick
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Posted: 21 July 2011 at 4:21pm |
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And here's a good tip for anyone who's experienced vibration while using hubcentric wheel spacers... DIY: Wheel spacer vibration fix I wouldn't bother at all with non-hubcentric wheel spacers. I think you'd just be asking for trouble.
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Patrick
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Posted: 22 July 2011 at 12:02am |
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I ordered two pairs of these wheel spacers tonight. One pair for the back of the duke, and a second pair for another club member (who shall remain nameless in case he can't bear the shame).
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Romeo
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Joined: 16 November 2008 Location: Canada Status: Offline Points: 3033 |
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Posted: 22 July 2011 at 3:07pm |
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Classy! Now I want to know though... Oh well, I remember where everyone's rims were sitting before. I'll just take note if anyone's move out. 
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Never shift into reverse without a back-up plan.
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Colby
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Joined: 30 March 2009 Location: Abbotsford/Sask Status: Offline Points: 665 |
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Posted: 24 July 2011 at 11:03pm |
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Patrick, I just found a topic on Pennock's about bearings and hubs which might interest you.
http://www.fiero.nl/forum/Forum2/HTML/108566.html |
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88 Formula 5 speed
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Romeo
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Joined: 16 November 2008 Location: Canada Status: Offline Points: 3033 |
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Posted: 25 July 2011 at 12:09am |
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It's ok Patty, you'll be happy to hear that in order to maintain my mudder rims and tires, I have a spacer that will be taking my 8-lug bolt pattern down to a 5-lug.
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Never shift into reverse without a back-up plan.
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Patrick
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Joined: 19 April 2008 Location: Vancouver Status: Offline Points: 5 |
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Posted: 25 July 2011 at 12:39am |
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Thanks Colby, that eBearing fella is a pretty smart cookie. Of course, the whole time I'm reading that thread I'm expecting to see something about 1" wheel spacers being a big no-no. After reading what the eBearing fella was saying, maybe I'll just stick to using my hard street tires on the autocross track.
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Colby
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Joined: 30 March 2009 Location: Abbotsford/Sask Status: Offline Points: 665 |
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Posted: 25 July 2011 at 1:16am |
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Yeah, it does kind of make you think. At least with autocross we're only exploring the car's limits for maybe 7 minutes worth of driving a day. If Brian hasn't had any issues yet, they can't be too bad. It does make me feel better about sticking with my current tires on the lighter 14" rims, though, I had considered running something wider and stickier. |
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88 Formula 5 speed
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Romeo
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Joined: 16 November 2008 Location: Canada Status: Offline Points: 3033 |
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Posted: 25 July 2011 at 7:18pm |
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I enjoyed reading about the brief discussion on converting to an A3/A6 set-up though. As was mentioned, this would strengthen the bearings to the point where the weakpoint became the ball-joints.
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Never shift into reverse without a back-up plan.
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Zac88GT
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Joined: 31 July 2008 Location: Canada Status: Offline Points: 20 |
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Posted: 27 July 2011 at 9:19am |
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There seems to be a lot of confusion around wheel spacers
with bearing loading. If what you are asking is: "Is there any difference in bearing loading between a wheel with the correct offset and a wheel with a different offset and a spacer to compensate?" then the answer is NO. If you were to bolt the proper wheel to the bearing hub, and the offset wheel, spacer, and another bearing hub together, they would be dimensionaly identical as would the forces being transmitted through them. Where the added bearing loads come in is when you choose wheel + spacer offsets that are different from the original wheels. Typically people want to put wider wheels on, but due to interference with the strut they need to buy wheels with a more negative offset. This moves the centerline of the wheel further away from the bearing which will increase the moment the bearing is required to support. Interestingly, increasing the tire diameter will cause added bearing loads due to lateral forces, but I've never seen this brought up before. |
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Patrick
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Joined: 19 April 2008 Location: Vancouver Status: Offline Points: 5 |
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Posted: 27 July 2011 at 10:29am |
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Yes, that's what I was asking. I was using the word "stress", but "load" is probably the proper term.
< Patty dances a jig around the room > That's exactly what I was suggesting. Now Zac, I gotta ask... What qualifications do you have to make this dissertation? I didn't have any formal "physics" education to back up my arguments, so nobody believed me.
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Zac88GT
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Posted: 27 July 2011 at 10:57pm |
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-I have an advanced diploma in mechanical engineering technology. -I'm a registered graduate mechanical technologist with ASTTBC. -I am now only one semester away from a bachelors degree in mechanical engineering. Glad I could shed some light on the subject 
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Colby
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Joined: 30 March 2009 Location: Abbotsford/Sask Status: Offline Points: 665 |
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Posted: 28 July 2011 at 1:28am |
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Interesting way of looking at it, though I'm having trouble grasping how it's dimensionally identical if, on the wheel with the spacer, the wheel's spokes are further away from the center of the car than the wheel with the proper offset. Doesn't that matter?
I came to my conclusion by taking a look at the simplest case where gravity is the only force (ie. the wheel is off the ground). In this case I feel certain than the wheel with the spacer will be exerting more torque on the bearing. Despite the end of the wheel ending up in the same spot as the wheel with the proper offset, more of the mass is further away from the bearing than the wheel with no spacer. I tried to make it clear to Patrick when I spoke with him that I wasn't even considering what happens when the car is accelerating (whether that's around a corner or in a straight line), things just get too confusing for me then. |
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88 Formula 5 speed
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Patrick
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Posted: 28 July 2011 at 12:06pm |
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Thanks Zac, all input into this discussion is appreciated, especially when it agrees with my stance.
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Patrick
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Posted: 28 July 2011 at 12:13pm |
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That's true Colby, but I don't recall either one of us (or anyone else involved earlier in the discussion) making an issue out of that in particular.
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Car-2-Lo wrote:
