The bolts snapped while driving. The first one must have snapped a few weeks ago, cause i didnt notice anything specialand it has a little rust on it. The second one snapped the other day and i got stranded by the road, couldn`t drive the car home, it was 3:30am. I think the /&$(/$&%$/&$&% of *****es who changed my wheels, did a ****ty job, and they used another type of spacer, universal one, that has a bunch of holes that you move around until you get a fit, i wasnt at the shop while they did that. Ones i got there i noticed that these spacers where not exactly the same size as the hub, they were a little bit bigger,and to make them fit for the holes they tended to be further to one side.When i asked the mech about it, he shruged his sholders and said it was normal. If i remember my physics correctly, a un evaen circle puts stress on the bolts which snapped,due to the uneven G-force created by the spacers not being aligned with the hub. Actually, the spacer that was on the wheel with the broken bolts, was damaged so much that two holes became one...as i always save stuff i had saved the original spacers which ar much stronger and only have 4 holes, and when i tried it on the new wheel this morning, it fit perfectly. Those /&($(/&$/&$ didn`t even try the original spacers.
Anyway, the car is at another shop today, to remove the two broken bolts,and change the spacers back to the originals. Hopefylly the thread has not been broken...i`ll let you all know how this saga ends, for future references.
thanks all for the suport