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Description
APEX ARC-8 | 19" x 8.5" ET35 | 5x120mm | 72.56mmAPEX Race Parts designs and manufactures high performance, flow formed and forged wheels for a growing list of vehicle makes. They are constantly expanding their product line with new wheel designs, wheel accessories and other performance and race parts. It is their mission to produce and distribute high quality performance parts that meet the demands of racing and street performance enthusiasts. FOR WHEEL FITMENT GUIDE https: apexwheels. com fitment
APEX Race Parts designs and manufactures high performance, flow-formed and forged wheels for a growing list of vehicle makes. They are constantly expanding their product line with new wheel designs, wheel accessories and other performance and race parts. It is their mission to produce and distribute high-quality performance parts that meet the demands of racing and street performance enthusiasts.
ModelARC-8 Wheel QuantitySold Individually, Sold Individually in either Anthracite, Hyper Silver, Hyper Black or Satin Black, please let us know what colour you want when you order Wheel Diameter19" Wheel Width8.5" OffsetET35 Bolt Pattern5x120mm Centre Bore72.56mm Load Rating1,650lbs Weight20.45lbs (9.27kg) Face ProfileProfile 1; shallow concavity Wheel ConstructionFlow Formed
Fit Matters The right solution for every application
An optimized car setup begins with the perfect wheel and tyre fitment. Without model-specific attention to each wheels specifications, maximum performance is compromised. Each size was selected to find the right balance between a clean fit and the most grip possible. The ARC-8's wide range of widths, diameters, offsets and face profiles result in unique fitments ranging from 8.5" to 10.5" wide. Each wheel combines these features to meet the different brake caliper, strut, and fender clearance needs of each BMW model. Most vehicle models have options for wheels that range from direct-fit to aggressive for specialty applications. Daily drivers and professional racers don't have the same needs, so why should they be forced to buy the same exact fitment?
Face Profile One design, many levels of beauty
The ARC-8 wheel is available in two unique face profiles. The shallower face provides increased caliper clearance on narrow applications, while the deeper concave face reduces weight and creates a stunningly aggressive appearance on low offset and wide width applications. These two face profiles are available in all 17", 18" and 19" diameters.
Spokes More than just a pretty face
The spokes of the ARC-8 were designed to be robust where they need to be and extra lightweight where they can be. The split "Y" spokes were carefully evaluated from every aspect to ensure light weight and remarkable strength. The lack of a deep front lip and spokes that connect directly to the barrel's lip create a rigid wheel with even load distribution. These features help reduce one of the most common concerns with aftermarket wheels — bending. Beauty follows function with this extremely popular design, as it adapts perfectly to both flat and concave versions.
Brake Clearance - Spokes Spokes that work for you
If the spokes of a wheel don't clear your brake calipers, then the wheel can't turn. APEX made sure the spokes on all 18" APEX wheels properly clear all OEM brake calipers, spacer free. Because of the large variation in clearance needs, APEX produced the ARC-8 wheel using two unique face profiles. When the correct profile is used for each specific vehicle application, most Big Brake Kits fit behind the 18" spokes, although a few applications will need a thin spacer due to the added width of aftermarket calipers. The flatter face profile offers maximum caliper clearance for high offset, narrow wheels, and older vehicles with Big Brake Kits. The deeper 18" concave face still has enough room to clear wider aftermarket Big Brake Kits on almost all applications, as APEX designed the spoke profile to require a thin spacer only in a few rare situations. Contact us to confirm brake clearances for your specific application.
Brake Clearance - Barrel A lot of room in a tight space
Spoke clearance is only half the problem. The barrel opening on a wheel also needs to be big enough to clear the sides of your caliper and rotor. Not all 18" wheels are made equal though. APEX designed the ARC-8's barrel to open to it's largest diameter as early as possible. The sooner this happens and the wider it opens, the larger the brake kit you can fit. This is vital on 18" applications because without enough clearance, most larger diameter brake kits will almost certainly not fit behind typical wheels. Most 18" wheels on the market make aesthetic compromises to their design that consumers wouldn't even know have a major negative impact on barrel clearance. Those wheels may work with smaller stock brakes, or smaller diameter Big Brake Kits, but the larger kits will pose a major problem. APEX 2D modeled most Big Brake Kits available in Solidworks and altered the wheel design to clear as many kits as possible. The 18" ARC-8 wheels can clear some 380mm kits, and everything smaller clears the barrel with ease. Contact us to confirm brake clearances for your specific application.
Open Hub Centre Form follows function
Race wheels can't just be light, they need to function in a high performance environment. Unlike the narrow lug recesses of most other wheels, the ARC-8 wheel boasts a completely wide-open design that easily fits over-sized race lugs and beefy impact sockets. This allows for quick and easy wheel changes at the track, and as a bonus prevents chips and scratches from tools for those just running these wheels on the street.
Hub Centric No rings or adapters here
All ARC-8 wheels are purpose built for select vehicle applications, and centering rings are never required for any BMW application. All 5x120mm bolt pattern wheels feature a direct-fit 72.56mm centre bore.
Centre Cap A factory fit and finish
APEX don't reuse one cap design for all their wheels. Every ARC-8 wheel is designed to work with factory centre caps. You can easily replace APEX centre caps with OEM roundels for a clean factory look. The ARC-8 wheel will come with either a carbon-look centre cap or the redesigned, Gloss Black centre cap that mimics the size and shape of a BMW factory centre cap.
Wheel Hardware Original or Aftermarket, it all works
The ARC-8 wheel can be used with all OEM and aftermarket mounting hardware with a 60° tapered seat. Lug bolts, wheel locks, and stud conversion kits all work perfectly. The ARC-8 wheel also accepts wheel spacers without issue. The shallow rear chamfer allows the wheel to remain hub centric even when 5mm flat spacers are used. The chamfer is deep enough to clear the chamfered lip some aftermarket spacers have that would typically cause improper seating and wheel vibration.
TPMS Sensors They all fit
TPMS sensors, which monitor tyre pressure, are one piece of technology that can't be compromised. The attention to OEM compatibility on the ARC-8 wheel doesn't end with centre caps. All APEX wheels accept OEM and aftermarket equivalent BMW TPMS sensors, and any standard sized metal or rubber valve stem.
THE APEX STANDARD
Flow Forming Benefits of forging, without the pain
These APEX wheels are produced using a manufacturing process known as flow forming. This process significantly reduces weight in the barrel, which has the greatest impact on rotational mass. During the manufacturing process, rollers apply high pressure to the inner barrel, compressing the aluminum into its final shape. This effectively eliminates porosity and aligns the grain structure of the metal, which increases tensile strength. The end result is a lightweight and extremely strong barrel that equals that of a traditional forged wheel at a fraction of the cost.
Testing & Certifications Verifiable 3rd party testing
Many companies promote their wheels as being certified by the VIA when they actually aren’t. That’s like using the USDA logo on food without permission. APEX wheels get officially tested and registered by the VIA in Japan, and they have the proof to back it up.
Japan’s JWL is a commonly followed standard for wheel load ratings. The APEX flow formed wheels meet, and most exceed, their load rating requirements. Most manufacturers only meet the minimum while some don’t even do that. Check and verify load ratings before you buy.
Weight & Strength Optimization It’s all in the details
Various design features were implemented to ensure that the ARC-8 wheel design was as light and durable as possible. APEX began with a strong one-piece design featuring an open hub centre and reliefs in the mounting pad to remove weight between lug holes. The design was then run through Finite Element Analysis (FEA) to further optimize the spoke and barrel design. The result is a light weight wheel with extra strength in all the right places, while keeping weight to a minimum.
Finishes Because being faster is just not enough
The ARC-8 wheel is available in multiple finishes, in addition to exclusive finishes available only through select dealers. All APEX wheels are finished using a comprehensive multi-stage liquid paint system over a powder coated base coat. Standard finishes include gloss metallic finishes, and semi-gloss or matte finishes. Hyper finishes include an additional coating of a premium liquid-like metallic silver to create a uniquely bright finish that can only be achieved through misting liquid paint.
Often overlooked, painted or powder coated lug hole seats can cause hardware to loosen or begin the spread of chipping the paint to more visible sections. The ARC-8 wheel's coating process leaves lug holes, centre bores and mounting pads unpainted, which ensures proper fit and torque values.
Warranty A wheel you can depend on
APEX wheels now come with a lifetime structural warranty and 1 year finish warranty, so you can be confident in your purchase.
Models
1 Series / E82 / E88 (2007-2013) / 1 Series M (1M)
A history of Monroe's discoveries and seminars
I took his seminars in the 1993-4 periods
Excellent beyond my expectations
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Reviewed in the United States on April 3, 2025
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GiveHerAGoodMunchin
San Leandro, US
★★★★★ 5
Excellent trilogy. This is book 2
Format: Paperback
Bob Monroe is an OG OBE G. Love this trilogy. If you can read, read this
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Reviewed in the United States on August 25, 2025
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Joe Neal
Pawtucket, US
★★★★★ 5
Great (excellent) details for the date written
Format: Paperback
NOTE: I toned this version down in 2021 – I was in a bad place when I wrote the original and there were some hostile and entirely inaccurate personal remarks in it.
A few tables/charts with a wealth of information have tiny text but most of this was easy enough to read. The photos are poorly produced (at least in the paperback version I reviewed), which is sad given they would be so handy otherwise.
This is a classic post-war treatise on the weapons used for ground warfare during World War II by the U.S. Army and as such the Marines. It was first published around 1947 when the war was fresh and doubtlessly numerous technical details were still classified. It was written by a man intimately involved in many design projects. The coverage pretty much explains the breadth.
Examples of use are included for some weapons and detailed tables of data for many. He explains references to the "long primer" for the 76-mm gun and the 81-mm mortar T1 extension tube. I am happy to have bought it for that and numerous other details.
One thing I missed when I first wrote the original rambling, a bit over the top review back in September 2015 was that the 57mm M1 antitank gun is not mentioned even though it was a key component of Infantry weaponry in 1944-45, sometimes maligned but often quite effective when carefully used as noted in many, many detailed accounts. Perhaps it was skipped because it was a revision of the British 6 pounder and not designed by Barnes men? Yet, it is an example of the issues caused by the pre war budget minders forcing the Army into desperate choices as explained later – and the using arms who decided to adopt it almost at the last minute, late in 1943. Until a weapon is adopted by the Army ammunition cannot be developed – it costs too much money and time to do so.
Most of the book is positive and ignores failures, posed from the viewpoint of a proud designer not an actual user. Yet those failures illustrate the issues Ordnance had to deal with during the war. The U.S. invented the bazooka as the 2.36-inch model in 1942 yet the Germans fielded the more powerful 8.8-cm (88mm) model in 1944; and the U.S. did not get the 3.5-inch (90mm) into production-ready state until the war was ended. This was caused by offloading development onto people who went out for a “super rocket launcher” that had no place in the war. All too often, some excited designers did indeed get ahead of themselves when it came to what worked but was a bit too much (and ultimately impractical for the Army at the time). The inability to develop hollow-charge (HEAT) ammo for cannon and howitzers to reach its minimum potential (twice the caliber in penetration or better) was common for all countries including the U.S. The 105mm howitzer round was pretty good and while disparaged by all and sundry even the 75mm howitzer’s shell could (and did) take out medium armor.
Barnes refers to the M3 and M5 light tank as "excellent" when the tanker's epithet would have been "tin plated coffin with a pea-shooter". Here we have an issue with comparing numbers such as armor thickness and penetration power of guns to facts; it is common to think they were butchered such as in Africa when in fact they fought well enough, flaws and all. But they were not the weapons the tankers wanted (nor deserved), and thus tanker’s complaints were valid. And, yes, they were not seen as a prime resource for fighting German tanks and hence reverted to recon and infantry support roles. Where they continued to meet and destroy German armor (but also be destroyed). Any German field commander would have loved to have a battalion of M5s on hand chasing down and chewing up U.S. troops; the contribution of the men in the light tanks in Europe in 1944 and 1945 is all too often belittled by the “number nerds” who toss the light tanks off as useless. They were anything but useless.
Why were the M10, M18, and M36 designed as “Gun Motor Carriages” and not tanks? Because they were developed for the tank destroyer forces and the very bigoted officers who held the most sway on development wanted them to be nothing but “motorized antitank guns”. If they had been designed as tanks that would have invalidated Tank Destroyer Doctrine immediately. And yet, in the end, the men doing the fighting needed and wanted tanks, so they used them as tanks as much as they could, despite the open roof and lack of internal machine guns. It is claimed the gun motor carriages were cheaper than tanks (a specious argument given price varied by manufacturer and ultimately depended more on quantities produced not some arbitrary raw number) but to produce the gun motor carriages for a specialist role that was neither tank nor artillery (albeit they were used for both) was a costly thing to do.
The failure to develop a better light tank in time is not mentioned even though the T7 light tank with a 57-mm gun was ready in mid-1942 and could have been in the field around 1943 (the Armored Forces botched that one). The M24 was a nice tank but too late simply because development came too late because development had been stunted badly by congress and it’s miserly pre-1941 budget.
There are errors: The design of the M24 began in 1943, not 1945. The 76-mm gun could hardly penetrate the "...heaviest German tank armor." But it could penetrate a lot of armor and the myth that all German tanks were Tigers and Panthers is one of those fantasies of the war pursued by people who are glorifying the war not understanding it (most German armor was medium or lighter), let alone the myth that they were always met head-on is ridiculous. The 90-mm gun was not optimized for anti-tank use and hence had the same issues with dealing with the frontal armor of the Panther (though it could handle the Tiger) and yet was better at that than many other guns. The tendency to adapt anti-aircraft guns for anti-tank guns was common and is where Germany got its 88s and the 128mm. The U.S. found it did not need a lot of 90mms (the homeland was not threatened and what it produced was enough for its needs); there was never the demand for a higher altitude version and hence nothing like the 8.8cm FLAK 41 was developed which led to the 8.8cm Kwk43 and Pak43s; yet Ordnance built their own versions of hot 90mm for tank use.
I missed the boat in my original review failing to detail how the Army’s main issue was the budget provided by Congress and politicians from 1920 through 1940. They starved the Army; the U.S. was peaceful and they had no interest in making it a military country and as such kept the Army small (and starved the air forces and Navy as well but not as badly). This crippled development; while the Soviets started building a modern Army in 1930 complete with investment in tank forces and tank arsenals; the Germans in 1934 or so; and British in 1934 or so; the U.S. politicians did not begin serious spending on the Army until 1941. Before then, the budget was all about “beans, bullets, and bayonets” and of course bodes to wield them. The Army had to struggle with what it had and put to field what was practical not what was best. Thus, for example, the recoilless rifles (used by the Germans in 1940) did not arrive in U.S. use until 1945. And yet a U.S. officer bult the first recoilless rifle to be used way back around 1916.
Indeed, a brief little discussion on how the U.S. produced what it did based on budget would have opened many eyes. The Soviets produced so many thousand T34s for example, more than the U.S. – and in the U.S. the budget people were always saying, “You don’t need any more, stop building them!” As mentioned, the number of 90mm AA guns the U.S. produced was not based on manufacturing capacity but because they didn’t need more.
Thus - there is a lot of information and many details many people will never have heard before. There are also many missing details concerning the Ordnance Department struggles to get things done in a very brief time frame thanks to how Congress had refused to let them do anything earlier. Dig into that deeper and you might find it nauseating the way people played games that hindered the U.S. Army in its job of helping beat the Germans. And sometimes couldn't put 2 and 2 together to get the right answer. But, they were human after all, and people do make mistakes.
In my original review I argued that “If you want a politics free book you will not get it in this once, not unless you shut your eyes and remain ignorant . . .” but that is wrong. If this was a political book, Barnes might have ripped the budget mongers of the 1920s and 1930s a new sphincter for leaving the Army (and U.S. military as a whole) in such a bad situation as they did when war broke out. But, Barnes had more class than I do.
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Reviewed in the United States on September 19, 2015
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Petey K
Natrona Heights, US
★★★★★ 5
Good content, very small print and photos
Format: Paperback
Get a magnifying glass… the print is tiny. They must have made this book to be a large hard cover because both the print and the photos are so small in paperback. Content looks decent. It’s a gift for my grandson who will probably spend more time with the photos than the reading anyway and his eyesight is better than mine. :D
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Reviewed in the United States on December 16, 2025
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Museum Man
Charlottesville, US
★★★★★ 4
Printing not up to standards.
Format: Paperback
Printing and pics not up to par.I gifted this book to a coworker and he was not as picky as I.
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