Installed and used properly with a good brand product they have no different additional load on the original studs or wheel bearings than smaller backspaced rims. I am talking about the ones that bolt on to the stock studs and privide new studs built into the spacer - the thinner spacers that simply sit between the wheel and the disc/drum face will put additional load on the studs as the wheel is moved out along the stud and will often result in studs breaking under the additional strain.
I think the main reason they are deemed not allowed for road use is you cant check the tension on the original stud nuts without removing the wheel, so problems are not as quickly noticed. That and poor quality ones falling apart too!
Its fine to say that you will check them on a regular basis (say weekly for example) but if they made them legal then people with no mechanical aptitude would be free to fit them and subsequently not check them. If they weren't illegal I would have no hesitation in using them myself (a good quality set that is).
Not sure if they are available, but a disc with thicker section would be ideal (basically like a spacer inbuilt). My old mini (1974) had a 1 & 1/2 inch wider track than the standard version as the drums had an extra 3/4 inch thickness on the face of the hub, with 3/4 inch longer studs to suit. This was not an aftermarket thing it was factory standard for the '74 S model to give it the sportier stance.
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Cheers, Dave :)
2010 JK, then a 2015 KL Trailhawk, now a 2017 GC Trailhawk!
Over 5000 Club
Last edited by SeaComms; 17-08-2011 at 07:03 PM.
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