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Cutting An Extreme Concave

Ever wonder what goes into making an extreme concave wheel? The UWTG and Savini Wheels show you from start to finish.

John Bowker Jr.
May 17, 2011
Photographer: Edgar Hoill

Wheels with extreme concave faces are dominating the market when it comes to segment and style popularity and while they offer a bold and menacing look they also create a flair and sense of depth that is unmatched and unrivaled. Even with cars “challenged” with positive offsets, extreme concave wheels have come to the rescue and we stopped by Savini Wheels to get a few facts—and a few pictures of the wheels getting cut. For starters, extreme concave wheels are made possible by using thicker centers (face of the wheel). The thicker units allow the machine to hog out excess material and in this pictorial you’ll see just how much thicker these forgings are compared to “standard” faces used to cut an average wheel. The end result is a dramatic new look that’s taking the market by storm and now the only question is who’ll make a style that best suits your style.

The centers of the wheels (aka lathe blanks) weight in 65 lbs. By the time the machine is done there will be about 45 lbs that will be shaved off and all shavings will be recycled, melted and formed into new Lathe Blanks.

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Depending on the size of the rim, jaws are installed to keep the rim in place and a set of jaws cost about $800 for 22-inches and up.

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10 different drill bits are used to make this particular wheel. Drill bits are made of 100% carbide and can cost from $30 to $150 a piece.

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Each drill bit is calibrated individually. A piece of paper is used to measure the stopping point of each drill bit to keep it from damaging the jaws.

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An Indicator is used to locate the Lathe Blank from different points. This tool is used to locate the center of the Lathe blank.

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The starts cutting utilizing the largest bits first, from there it transfers to smaller bits and starter holes are opened up using a one inch bits.

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Recycled shavings pay about .60 per pound and on average 7,000 lbs per month is recycled.

Seven smaller drill bits are used to make the details on the wheel and groves.

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After most of the wheel is drilled out. An End Mill bit is used to clean out the roughness that the Rougher Bit has caused.

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A mixture of water and lubrication oil is mixed into a 5 gallon bucket to make Coolant for the machine so the drill bits can stay cool and not break from the heat.

After each wheel is finished is then engraved with the order number, color, size, style and if is made for the front or real wheel.

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The last drill bit is used to make the rivet holes to hold the 3-piece wheel together. In total, 40 holes will be drilled to hold together 22-inch wheels.

The extreme concaved center of the wheel is finished weighing in at 20 pounds.

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Extreme Concave Casting vs. Standard Casting

A finished 22 inch SV 25 Extreme concave is finished and is weigh in at 20 pounds. 45 lbs is shaved off the Lathe Blank.

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By John Bowker Jr.
2 Articles



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