Is it possible to install 2 5mm spacers on one wheel with the wheel studs that come with the 5mm spacers? i bought two sets but dont think i will use it for the front. So is this safe? Also, can i install the longer wheel studs in the front incase i use spacers later on?

 

No. There is no way I would attempt to put on more than one wheel spacer per wheel. Using more than one is just adding possible points of failure. Theoretically I suppose you could but it's better to just pay for new 10mm spacers.