Track forum general chit chat.

[slicer]

Originally Posted by M3 Number 86

Picked up these. Himeta bronze and white.

10 et25 square or 10.5 square??

[M3 Number 86]

Originally Posted by slicer

10 et25 square or 10.5 square??

18x10et25

Stopped messing with wheel fitment long time ago and have just been happy with standards plus a 265 tire. Works with no headaches lol

[1MOREMOD]

275 should also? Unless got them r1 wide ass ones.

[XCUSE_M3]

Originally Posted by M3 Number 86

18x10et25

Stopped messing with wheel fitment long time ago and have just been happy with standards plus a 265 tire. Works with no headaches lol

I'm about to try the 280/660r18 scrubs I have at home in a few weekends I will let you know how they fit. I have like 20 of the 265/660r18

[slicer]

Originally Posted by M3 Number 86

18x10et25

Stopped messing with wheel fitment long time ago and have just been happy with standards plus a 265 tire. Works with no headaches lol

I hear you. I'm tempted to try 10.5 square but 10 is a far easier fitment in the front. And do you really need that extra 1/2" for a 265 or 275? I think not.

[M3 Number 86]

Originally Posted by XCUSE_M3

I'm about to try the 280/660r18 scrubs I have at home in a few weekends I will let you know how they fit. I have like 20 of the 265/660r18

Yeah been running 265/645/18 DH ad also have a set of Hoosier 265 s80 I've yet to try.

[M3 Number 86]

Originally Posted by slicer

I hear you. I'm tempted to try 10.5 square but 10 is a far easier fitment in the front. And do you really need that extra 1/2" for a 265 or 275? I think not.

Yeah don't think it matters up to even a 285 tire.

[inTgr8r]

Originally Posted by M3 Number 86

Yeah don't think it matters up to even a 285 tire.

Depends on the tire itself (tread width )
While it may fit the rim fine , if you get over square you will get more side to side squirm because the side walls can't keep it contained as well.

[Richbot]

Within reason, wider wheel under the same tire will perform better.

Not worth chasing but if you are limited by tire selection but can run whatever width you want for instance, good to consider.

[M3 Number 86]

All true but again, i don't think it's unreasonable on a 10 vs 10.5 up to 285.

[///Mobbin]

roastbeef I'm starting to think about doing a roof rack like yours to transport slicks to/from the track. Curious if you have a carbon fiber roof and also what all parts you used, willing to purchase an aluminum basket of some kind since I don't have access to a fabricator. Also only want two on top for weight reasons with the carbon roof, if it's even okay to transport stuff on it. Any info is appreciated!

[roastbeef]

Originally Posted by ///Mobbin

roastbeef I'm starting to think about doing a roof rack like yours to transport slicks to/from the track. Curious if you have a carbon fiber roof and also what all parts you used, willing to purchase an aluminum basket of some kind since I don't have access to a fabricator. Also only want two on top for weight reasons with the carbon roof, if it's even okay to transport stuff on it. Any info is appreciated!

when i started researching it, i couldn't find anything that was already manufactured that i would be satisfied with. there didn't seem to be anything long enough, other than full size suv racks, which was way too big.

i think the roof rack weight limit is 160lbs. i think my rack and the oem bases weigh around 15lbs. i wanted the weight to be evenly distributed. three tires in-line was too long, and the tires side by side were way too wide. two tires, in-line was perfect. i forget the weight, but two tires plus the rack was well under the maximum weight and was well balanced on the supports.

i do have the carbon roof, but that doesn't matter. every one of these cars has roof rack holes in the trim. the oem bases don't touch anything you can see with the connectors closed. i'll take more detailed pics next time i put it on.
my requirement was that all i had to do was unscrew the four bolts that hold the rack on, and i could lift it off myself. how i achieved this, was i dropped off two tires off at my fab guy for sizing. he tried to bend some of the 1" aluminum tubing, but it kept breaking, thats why i wound up with a rectangular basket. not super cool looking, but gets the job done.
when it was done, i went back over there and put the bases on my roof and put the basket on the bases to see where we would need to weld the tabs on the basket. it was important that the tabs sat flat on the base mounts when the bases were secured so there wasn't any weird tension on the basket when it was secured on the car. i also didn't want it to spring in any particular way or hold tension that would make it difficult to take on or off.
the bases secure with four bolts that go into threaded nuts which are part of the roof.
i take them on/off with my power ratchet. putting the rack on and taking it off takes just a few minutes from start to finish. it has been really convenient.

[scotty_miller]

I did a roof rack basket set up to transport wheels to the track. Bought a "vault" roof basket off amazon and then modified it to fit oem Bmw cross bars. Works like a charm. With three on the roof and two in the car, it gives you a ton of extra room for canopies, coolers, etc. plus it gives your car the badass weekend warrior look

[Richbot]

Originally Posted by M3 Number 86

All true but again, i don't think it's unreasonable on a 10 vs 10.5 up to 285.

Me either just a conversation of optimal vs. adequate, a 10 under some 255's is just about perfect for instance, usually not relevant for a heavy car that can fit relatively giant tires like the M3 can. And rim protection for a 285/30 on a 10.5 or 11 falls into the "suboptimal" category if you like not curbing your junk, it's a balancing act, lol

[M3 Number 86]

Originally Posted by Richbot

Me either just a conversation of optimal vs. adequate, a 10 under some 255's is just about perfect for instance, usually not relevant for a heavy car that can fit relatively giant tires like the M3 can. And rim protection for a 285/30 on a 10.5 or 11 falls into the "suboptimal" category if you like not curbing your junk, it's a balancing act, lol

i hate when it drops and the wheel hits the ground first lol

[///Mobbin]

roastbeef thanks for the write-up!

Originally Posted by scotty_miller

I did a roof rack basket set up to transport wheels to the track. Bought a "vault" roof basket off amazon and then modified it to fit oem Bmw cross bars. Works like a charm. With three on the roof and two in the car, it gives you a ton of extra room for canopies, coolers, etc. plus it gives your car the badass weekend warrior look

Nice, would love to see some pics if you have them. Thanks for the info!

[scotty_miller]

Originally Posted by ///Mobbin

roastbeef thanks for the write-up!

Nice, would love to see some pics if you have them. Thanks for the info!

Here's some pictures. Not the greatest photography quality but it does the job

[SQ13]

Originally Posted by ///Mobbin

roastbeef thanks for the write-up!



Nice, would love to see some pics if you have them. Thanks for the info!

Have you considered getting a tire trailer?

[CorruptCommie]

Originally Posted by SQ13

Have you considered getting a tire trailer?

Those are so quaint. Always gives me a good chuckle when I see them in the paddock. Likewise I give everyone else a good chuckle climbing in and out of the trunk to get wheels. Can't wait to roll it off the trailer this season and wander off in search of coffee.

[///Mobbin]

Originally Posted by SQ13

Have you considered getting a tire trailer?

I think about it all the time, lol!

LINK - Porsche Tire Trailer build

LINK - Execu-hitch

Problem for me is not a great spot to store it at my house.

[redpriest]

Originally Posted by Mantii

They weigh less than 3lbs each. The factory panels weight probably more than 15lbs each with the airbags etc. Definitely looks good and significant weight savings.

The problem is the mounting holes don't line up properly. You literally have to wrestle with the damn thing and beat it into place. I know others have had problems with Hard Motorsport stuff fitting properly.

Honestly I didn't even mount all the rivet holes for this one, I left a few undone - it wasn't worth the wrestling effort. It rattles on the highway but other than that, lol.

[roastbeef]

Originally Posted by SQ13

Have you considered getting a tire trailer?

i considered a trailer for a short minute. the cons outweigh the pros. the rack was simply easier. there were more steps to implementing a trailer, and the steps were more complicated.

1. figure out a hitch for the m3
2. figure out wiring for an m3 that wouldn't trigger electrical problems
3. buy trailer
4. store trailer
5. pay registration annually for trailer

steps for building a rack
1. talk to buddy/fab guy
2. find oem bases
3. hang rack away in garage when not in use and don't pay registration or maintain anything.

i have about $300 into my rack.