Originally posted by Ocean-Side M5
I am going to add a 3mm spacer and inquired about getting Longer Studs. This is the response i got and wanted to know if it was correct...
For those who are having trouble ordering the 3mm spacers from Tire Rack, the correct part number is TR358
. That will get you a 5 on 120 3mm spacer with a 74.1mm centerbore. They are $12.00 each. Having the correct Tire Rack part number may make your Tire Rack associate more comfortable selling them to you. I bought mine from Luke at x362.
As for needing longer wheel bolts, the answer is yes. I just did an experiment by installing a Tire Rack 3mm spacer under my rear wheel and used a stock BMW wheel bolt. I was able to get it to turn slightly more than 4.75 turns to a final torque of 88 lb-ft. That's 1.75 turns too few and, since the thread pitch is 1.5mm, it's about 2.6mm too short.
I do have a 4-wheel Brembo brake kit installed, so there is a slight chance that Brembo designed a 0.5mm to 1mm spacer into the hat. But I don't think that's the case and it's certainly not 2.6mm! I'll check into this tomorrow and get back to you.
Barring a revelation from Brembo, it's my opinion that you would be well served to use wheel bolts which are 5mm longer than stock. (That's a commonly available size.) There's plenty of room behind the front hub flange, so you could get away with using much longer bolts up front. In back, there's a clearance issue with the parking brake assembly, but the extra 2mm should not come in contact with anything.