Wheel Spacers

[Burkey]

It might be illegal but using a hub centric, wheel centric slip on spacer with the appropriate extended wheel studs is perfectly safe and is exactly the same as running an aftermarket wheel with an aggressive offset (like many people out there do). As someone said, Porsche commonly uses wheel spacers on the rear of their cars from the factory. I don't see any wheels falling off porsches. The ADRs are known for being obsolete and ridiculous in many areas. Wheel spacers are one of those areas.

The adapter/bolt on type is a different story. I would never run them on my car.

The issue that engineers have with them are far more complex than just the studs.
They are concerned with the added load on your wheel bearings and any changes in scrub radius to name just a few. You're also effectively changing the effect of castor although retaining the actual castor angles.
I'm not saying don't do it, just saying there's a helluva lot more to it than some studs and spacers.

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[spiller]

The issue that engineers have with them are far more complex than just the studs.
They are concerned with the added load on your wheel bearings and any changes in scrub radius to name just a few. You're also effectively changing the effect of castor although retaining the actual castor angles.
I'm not saying don't do it, just saying there's a helluva lot more to it than some studs and spacers.

Yep, I fully understand all of that. But there's a fear associated with the use of spacers that they WILL cause a failure, leading to an accident. Yet hundreds on these very boards are running aggressive 25mm and 23mm spacers on the mustang and I've yet to read about a single issue relating to their use. The Americans rack up the miles too.

 

[Burkey]

Yep, I fully understand all of that. But there's a fear associated with the use of spacers that they WILL cause a failure, leading to an accident. Yet hundreds on these very boards are running aggressive 25mm and 23mm spacers on the mustang and I've yet to read about a single issue relating to their use. The Americans rack up the miles too.

Totally agree. No supporting evidence that I'm aware of either. Having said that, non hub centric spacers....just NO!

 

[spiller]

Totally agree. No supporting evidence that I'm aware of either. Having said that, non hub centric spacers....just NO!

Absolutely!

 

[RSPEC-015]

As someone said, Porsche commonly uses wheel spacers on the rear of their cars from the factory. I don't see any wheels falling off porsches.

Ah yes, and the RMS have no problem with that because it's original equipment. It's been engineered and tested by Porsche and as such has the backing of the manufacturer.

The RMS in addition to placing limits on wheel width and overall tyre diameter changes also places limits on track changes, no more than 25mm. The wheels I've chosen 19x10 +40 F & 19x11 +55 R result in track increases of 5mm F & 20mm R; so well within the limits.

An increase in track would place more stress on suspension components and wheel bearings but it is all relative as the aftermarket wheels are significantly lighter and reduce the unsprung weight.

 

[PPPony]

Yep, I fully understand all of that. But there's a fear associated with the use of spacers that they WILL cause a failure, leading to an accident. Yet hundreds on these very boards are running aggressive 25mm and 23mm spacers on the mustang and I've yet to read about a single issue relating to their use. The Americans rack up the miles too.

And ........ they're illegal in Oz

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