Are these safe? 4 to 5 lug wheel spacer

Well consider that your rear wheels are just held on by the puny little C-clips, and the front only by a cotter pin and nut, that wouldn't be the weakest point. Most cars the wheels are just held in by the hub pressed into the berring, but it's rare you ever hear about that failing.

It would depend on the offset of the wheel. You don't want to stick the axis centerline way out and cause too much pressure, spacer or not.

Yes, they should be safe.
 
If you ant 5 lugs,do the conversion.It'll give you a lot of wheel options.With these spacers,I'd think you'd need an odd offset of wheel,limiting your choices.The 5 lug swap is easy,and cheap if you shop around.There are a lot of threads about it.
 
no way! spacers can be ok if they have a hub for the wheel to ride on, those dont. stock set-up the weight of the car rests on the hub (no weight on the lugs themselves) with those all the weight rest on the lugs.
 
True, but the fulcrum point is going to be the face of the rotor/drum. Moving the wheel out 2" increases leverage on this point and stresses the 4-lugs. At the very minimum these would have to be upgraded to stronger studs. Plus it's gonna make choosing your wheels pretty much limited to aftermarket only since none of the SN95/S197 wheels will really work when pushed out 2" each side.

By the time you buy the spacers and the upgraded studs, you could have bought the 5-lug rotors and drums/axles and done it the correct way. Just save your stock parts and swap it back to 4-lug in a couple hours
 
Actually, i remember a thread over on Mustangworld that was funny at the time.


Guy had a V6 Mustang and found some UGLY FWD rims he wanted to run, and he was asking about spacers. He wanted to run the cheap slip on ones. Guys were telling him they were unsafe but he didn't care...he did it anyway.

2 months later he posted about his wheel falling off and he lost control and totalled the car and how it was the car's fault and how he's never buying a Ford again. Someone found and dug up his old thread and everyone basically let him have it that he was warned.
 
There are a lot of good looking 4lugs that you can get, you just have to know where to look. 90% of Mustang owners just put on a set of different style Mustang wheels (me included). Its nice to see ones with aftermarket BBS wheels and such.