[Carrera2RS]

I have 9.5x19 ET22 and 10.5x19 ET45 Apex wheels and have 7.5mm spacers at the rear so actually running ET22, ET37.5 I am using longer wheel bolts at the rear and they are HEAVY in comparison to the fronts, what's the best and cheapest way of keep this weight low. I suspect 4 or 5 of them would weigh enough of a difference to be meaningful (possibly more than the difference between a forges and flow formed wheel)

Any good quality hollo read bolts, ti bolts, will stuff save weight and is there a good make that does this ?

Tks All

[to_riffic]

Your wheel bolts are negligible compared to say standard 2NH brakes vs AP's. Don't overthink it...

If anything, just get a stud kit, so holding the wheel nut will make you think it's light

[Carrera2RS]

True, I had just picked up the bag of bolts and had a heart attack !

[Track/S]

Buy titanium studs, $300 the cheapest.

[AlpsRider]

I looked into lightweight studs also. It sound like a nice way to save weight but after reading about potential problems, I passed on the mod.
This us one of the threads that changed my mind.

https://f80.bimmerpost.com/forums/sh....php?t=1356233

[Track/S]

That a random vendor on the forum posts a picture of a thread says absolutely nothing...

[SionLambert]

It's a great idea to choose longer and lighter wheel bolts to reduce the car's weight. Titanium bolts may be an excellent option to consider. Keep in mind that quality fasteners or mounting hardware may cost more, but it is worth it to ensure the safety and longevity of your vehicle. Usually, if I need pins, I order from scrooz.com.au because I have confidence in their quality. You might like them as they have a variety of high-quality bolts, including titanium bolts and hollow bolts that allow for less weight. Good luck with your search!

[No_curebimmer]

Originally Posted by Carrera2RS

I have 9.5x19 ET22 and 10.5x19 ET45 Apex wheels and have 7.5mm spacers

IIRC, specifically with their wheels, Apex does not recommend running any spacers that range between 6mm to 10mm due to the BMW hub and primarily their chamfer wheel design. Anything ≤6 or ≥12 should be safe.

In such scenario (whereby wheel will not/cannot be fully flushed to the hub) will allow unwanted lateral and axial stress on your bolts (or studs), giving way to what’s called ‘fatigue failure’ - one day materials look, feel and operate as designed, then next… they’ll just either snap or create fissures (geez, I now recall Hook’s Law, Poisson's ratio from Uni days…blah blah).

All I’m saying is that you might want to double check if it’s really safe to run 7.5mm spacers with Apex rims, even if the spacers are hubcentric.

[Track/S]

Originally Posted by No_curebimmer

IIRC, specifically with their wheels, Apex does not recommend running any spacers that range between 6mm to 10mm due to the BMW hub and primarily their chamfer wheel design. Anything ≤6 or ≥12 should be safe.

In such scenario (whereby wheel will not/cannot be fully flushed to the hub) will allow unwanted lateral and axial stress on your bolts (or studs), giving way to what’s called ‘fatigue failure’ - one day materials look, feel and operate as designed, then next… they’ll just either snap or create fissures (geez, I now recall Hook’s Law, Poisson's ratio from Uni days…blah blah).

All I’m saying is that you might want to double check if it’s really safe to run 7.5mm spacers with Apex rims, even if the spacers are hubcentric.

Bmw Motorsport does not agree with your comment
M2CS Racing 41mm front spacers.
M4 GT4 32mm front spacers.

[No_curebimmer]

Originally Posted by Track/S

Bmw Motorsport does not agree with your comment
M2CS Racing 41mm front spacers.
M4 GT4 32mm front spacers.

Ok…perhaps. What rims are referenced in your comment, OEM ones?

Nonetheless, my comment was related to specifically using Apex wheels, which have a different chamber design than OEM ones.

Hey, you do you. If the manufacturer says they do not recommend a specific sized spacer with their wheel, I would heed that advice.

[Carrera2RS]

Originally Posted by No_curebimmer

IIRC, specifically with their wheels, Apex does not recommend running any spacers that range between 6mm to 10mm due to the BMW hub and primarily their chamfer wheel design. Anything ≤6 or ≥12 should be safe.

In such scenario (whereby wheel will not/cannot be fully flushed to the hub) will allow unwanted lateral and axial stress on your bolts (or studs), giving way to what’s called ‘fatigue failure’ - one day materials look, feel and operate as designed, then next… they’ll just either snap or create fissures (geez, I now recall Hook’s Law, Poisson's ratio from Uni days…blah blah).

All I’m saying is that you might want to double check if it’s really safe to run 7.5mm spacers with Apex rims, even if the spacers are hubcentric.

Most recommend 0-5mm and 10mm+ if hubcentric. So avoiding the reduced central support for spacers below 10mm, that's the reason Turner make them. The BMW fitment is the same, the chamfer is the same on Apex wheels. If it wasnt then 10mm or larger hub centric wouldn't fit