马自达将在SEMA改装车展上发布两款 MX-5 Miata概念车。其中一款MX-5 Speedster在一年前就曾经亮相过，这款Speedster Evolution重量降低了100磅（约合45公斤）。这两款车都拿掉了风挡和敞篷车顶，可以更真实的感受完全敞篷行驶的感觉。白色车身涂装的 Evolution重量不到1吨，比量产版MX-5还轻了350磅（约合158.9公斤）。而另一款MX-5 RF Kuro概念车基于MX-5 RF，而“Kuro”一词取自日语的“charcoal”（木炭），它的车身也采用独特的半哑光炭黑色涂装。该车配备17x7.5英寸RAYS锻造轮圈，百路驰Rival G-Force轮胎。而它的可调悬挂则来自MX-5 Cup赛车。这两款概念车的设计和制造由马自达在加州Irvine的设计中心负责完成。

Mazda previews SEMA-bound MX-5 Speedster Evolution, RF Kuro
Mazda has previewed two MX-5 Miata concepts that will be headed to Las Vegas for SEMA.

Building upon the MX-5 Speedster that debuted nearly a year ago at the same venue, the Speedster Evolution removes a further 100 pounds. Both jettison the windshield and convertible top hardware in favor of a true open-air experience. Clad in White Ether paint, the Evolution is now under a ton -- 350 pounds less than the stock MX-5 soft top.

The open-cockpit concept is joined by the MX-5 RF Kuro, based on the Retractable Fastback variant. Borrowing the Japanese word for 'charcoal,' the Kuro features a unique semi-matte metallic exterior finish.

The rides on black 17x7.5-inch RAYS forged wheels, shrouded in BF Goodrich Rival G-Force rubber. Its adjustable suspension system is sourced from the MX-5 Cup racer.

Both concepts were designed and built in-house at Mazda's Irvine, California, design center.