I recently purchased as set of Ultra Alpine 402 wheels 17x8, 5x112 bolt pattern with a +32 offset. however I need new custom lug bolts for these wheels to fit on my hubs. The data sheet says I need lug bolts with a 60 Degree Conical Seat. I emailed UltraWheel and the guy told me a 12mmx1.5 thread with an approximate 17mm long tread shank, and to torque these @ 75-85 ft lbs. the problem is that I cant find any lugs bolt @ 12mmx1.5 with an approximate 17mm shank on the internet. I'm beginning to wonder if hes getting 17mm confused with the hex size which is 17mm as well. At radusadirect.com the smallest shank size is 23mm. Would that be the right size? It would be nice to also know how deep the thread holes on my hubs are too. So If I could please get some expert advise that would be awesome.