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SSR uses a non-typical Forging process which they call "SSF" or Semi-Solid Forged. This is what SSR says about the differences:

"How does SSR's Semi-Solid-Forging compare to regular forging?
Wheels made from regular forging are heated and pressed into shape. Semi-Solid-Forging uses a different manufacturing process whereby the wheel material is semi-melted prior to high-pressure injection into a mold. Semi-Solid-Forging allows increased flexibility with creating innovative wheel designs while also providing high strength and light-weightedness. "

"By combining the best features of casting and forging, SSR implemented them in the manufacturing process of SSF. Further research led scientists to develop a process whereby mixing alloys during the solidification process changed the original microstructure of the alloy from a branch-like structure to a globule granular structure. Alumax then perfected the aluminum stirring process, Magneto-Hydro Dynamics (MHD), and created the basis of SSF technology which results in a pure cylindrical alloy billet free of non-metals, gasses, oxides and other impurities. This MHD billet, when heated to a specific temperature, holds a semi-solid form. The billet is then pressed into a mold at a high rate keeping the preferred globule granular microstructure as the new shape is formed. The end product is very dense and strong. SSR is the only wheel manufacturer in the world to produce SSF aluminum wheels. SSR continues to research ways to further develop SSF, creating reliable, durable, and lightweight wheels."

Here are the weights I could find on the SSR Type F & Volk TE37 (standard)
http://www.ssr-wheels.com/wheels/typef_1516171819.asp
http://www.upgrademotoring.com/wheels/te37.htm

TE37 (vs SSR Type F)
17x7.5 +40 = 14.99 (16lbs) - TE37 lighter
17x8 +38 = 16.31 (16.5 - 16.1) - about the same

18x7.5 +40 = 16.20lbs (17.4 lbs) - TE37 lighter
18x8 +30 = ~18.08 (18 lbs) - about the same
19x9.5 +35 = ~20.72 (20.3 - 19.9) - SSR lighter

18x9.5 +35 = 18.23 (18.7 lb) - TE37 lighter
18x9.5 +40 = 18.10 (18.6 lbs) - TE37 Lighter

<blockquote data-quote="Hapa88" data-source="post: 1605609" data-attributes="member: 11581">SSR uses a non-typical Forging process which they call &quot;SSF&quot; or Semi-Solid Forged. This is what SSR says about the differences:&quot;How does SSR&#039;s Semi-Solid-Forging compare to regular forging? Wheels made from regular forging are heated and pressed into shape. Semi-Solid-Forging uses a different manufacturing process whereby the wheel material is semi-melted prior to high-pressure injection into a mold. Semi-Solid-Forging allows increased flexibility with creating innovative wheel designs while also providing high strength and light-weightedness. &quot;&quot;By combining the best features of casting and forging, SSR implemented them in the manufacturing process of SSF. Further research led scientists to develop a process whereby mixing alloys during the solidification process changed the original microstructure of the alloy from a branch-like structure to a globule granular structure. Alumax then perfected the aluminum stirring process, Magneto-Hydro Dynamics (MHD), and created the basis of SSF technology which results in a pure cylindrical alloy billet free of non-metals, gasses, oxides and other impurities. This MHD billet, when heated to a specific temperature, holds a semi-solid form. The billet is then pressed into a mold at a high rate keeping the preferred globule granular microstructure as the new shape is formed. The end product is very dense and strong. SSR is the only wheel manufacturer in the world to produce SSF aluminum wheels. SSR continues to research ways to further develop SSF, creating reliable, durable, and lightweight wheels.&quot;Here are the weights I could find on the SSR Type F &amp; Volk TE37 (standard)<a href="http://www.ssr-wheels.com/wheels/typef_1516171819.asp" target="_blank">http://www.ssr-wheels.com/wheels/typef_1516171819.asp</a><a href="http://www.upgrademotoring.com/wheels/te37.htm" target="_blank">http://www.upgrademotoring.com/wheels/te37.htm</a>TE37 (vs SSR Type F)17x7.5 +40 =&nbsp; 14.99 (16lbs) - TE37 lighter17x8 +38 = 16.31 (16.5 - 16.1) - about the same18x7.5 +40 = 16.20lbs (17.4 lbs) - TE37 lighter18x8 +30 = ~18.08 (18 lbs) - about the same19x9.5 +35 = ~20.72 (20.3 - 19.9) - SSR lighter18x9.5 +35 = 18.23 (18.7 lb) - TE37 lighter18x9.5 +40 = 18.10 (18.6 lbs) - TE37 Lighter</blockquote>

[QUOTE="Hapa88, post: 1605609, member: 11581"] SSR uses a non-typical Forging process which they call "SSF" or Semi-Solid Forged. This is what SSR says about the differences: "How does SSR's Semi-Solid-Forging compare to regular forging? Wheels made from regular forging are heated and pressed into shape. Semi-Solid-Forging uses a different manufacturing process whereby the wheel material is semi-melted prior to high-pressure injection into a mold. Semi-Solid-Forging allows increased flexibility with creating innovative wheel designs while also providing high strength and light-weightedness. " "By combining the best features of casting and forging, SSR implemented them in the manufacturing process of SSF. Further research led scientists to develop a process whereby mixing alloys during the solidification process changed the original microstructure of the alloy from a branch-like structure to a globule granular structure. Alumax then perfected the aluminum stirring process, Magneto-Hydro Dynamics (MHD), and created the basis of SSF technology which results in a pure cylindrical alloy billet free of non-metals, gasses, oxides and other impurities. This MHD billet, when heated to a specific temperature, holds a semi-solid form. The billet is then pressed into a mold at a high rate keeping the preferred globule granular microstructure as the new shape is formed. The end product is very dense and strong. SSR is the only wheel manufacturer in the world to produce SSF aluminum wheels. SSR continues to research ways to further develop SSF, creating reliable, durable, and lightweight wheels." Here are the weights I could find on the SSR Type F & Volk TE37 (standard) [url]http://www.ssr-wheels.com/wheels/typef_1516171819.asp[/url] [url]http://www.upgrademotoring.com/wheels/te37.htm[/url] TE37 (vs SSR Type F) 17x7.5 +40 = 14.99 (16lbs) - TE37 lighter 17x8 +38 = 16.31 (16.5 - 16.1) - about the same 18x7.5 +40 = 16.20lbs (17.4 lbs) - TE37 lighter 18x8 +30 = ~18.08 (18 lbs) - about the same 19x9.5 +35 = ~20.72 (20.3 - 19.9) - SSR lighter 18x9.5 +35 = 18.23 (18.7 lb) - TE37 lighter 18x9.5 +40 = 18.10 (18.6 lbs) - TE37 Lighter [/QUOTE]

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