m405 performance alloys, worth the risk?

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Comingoutsideways
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m405 performance alloys, worth the risk?

Post by Comingoutsideways »

Looking at the available options for a used 240i I am looking at, and love the look of the m405 alloys (diamond cut with u shaped spokes). Wouldn't be buying new but used sets are normally kerbed. If these were normal alloys this wouldn't worry me, but as they are diamond cut it could 1. Cost a fortune or 2. Be kerbed so deep they can't actually be corrected without weakening them. The do look fantastic but just wondering if anyone has these and general thoughts. I believe diamond cut wheels can only be corrected a couple of times before too much material is removed.
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tweeky
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Re: m405 performance alloys, worth the risk?

Post by tweeky »

lower side wall tyres needed for these wheels makes the ride a bit hard you'll feel every bump.
Current 2018 F22 M240i Sunset Orange Black leather with lumber support,Pro Nav, Adaptive LEDs, HK, Sunroof F&R PDC.
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marco_polo
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Re: m405 performance alloys, worth the risk?

Post by marco_polo »

Correct, you can only re-machine them down so far. But you can cosmetically fill deep kerb marks too, alloy welding, metal-repair epoxy, etc.

405m and 624m are lovely rims, forged for strength.
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mick.86uk
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Re: m405 performance alloys, worth the risk?

Post by mick.86uk »

Comingoutsideways wrote: Mon May 13, 2019 10:40 pm Looking at the available options for a used 240i I am looking at, and love the look of the m405 alloys (diamond cut with u shaped spokes). Wouldn't be buying new but used sets are normally kerbed. If these were normal alloys this wouldn't worry me, but as they are diamond cut it could 1. Cost a fortune or 2. Be kerbed so deep they can't actually be corrected without weakening them. The do look fantastic but just wondering if anyone has these and general thoughts. I believe diamond cut wheels can only be corrected a couple of times before too much material is removed.
Be careful with BMW diamond cut rims as I have a set of 442m that were unmarked until I went for new rear tyres.

Replaced the original Bridgestone RFT with Michelin PS4 and after a few weeks white worm appeared under the clear coat from the centre.

Only explanation is the tyre fitter pushed the centre caps back in after balancing the wheels and cut into the clear coat... :roll:
2016 F36 440i GC
Gone:
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2009 E92 335i M Sport
2004 E46 M3
2005 E87 130i M Sport
mick.86uk
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Re: m405 performance alloys, worth the risk?

Post by mick.86uk »

Image


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2016 F36 440i GC
Gone:
2014 F20 M135i
2009 E92 335i M Sport
2004 E46 M3
2005 E87 130i M Sport
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Spin
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Re: m405 performance alloys, worth the risk?

Post by Spin »

I'd highly recommend the 405 as they add so much asthetically. I bought used and the nearside 2 do have the usual kerb damage and plan to get them refurbed at some point but they still look a huge amount better than standard rims. I notice no ill effects to ride quality but am not on RFT.

Second hand they sell for around a grand but usually need tyres so a good opportunity to upgrade to PS4 s.

This is my car with 405m, PS4s and 10 & 12mm spacers.

I don't actually like the spacers so these are coming off....

ImageImageImage

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Last edited by Spin on Sun May 24, 2020 7:49 am, edited 1 time in total.
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Re: m405 performance alloys, worth the risk?

Post by bikerdave »

mick.86uk wrote: Sat May 23, 2020 8:26 am Image


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Mick, they probably rammed the centering cone in or caught the lip inside taking the wheel off the shaft. You'd never know 'guv' until the water has crept under and the corrosion starts. Couple this with a worn socket that rips the protective black coating off your nuts, socket has already used the wheel as a guide to get onto the nut and the final icing on the cake is the nice new blue streak on the inside of your ceramic coated wheel as they used the M caliper to get the wheel on cos 'they are bloody heavy' these alloys these days guv!!

Bitter experience yes, if anyone can truly recommend a company that doesnt do this I'll gladly drive the extra distance :( :(
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