ROLA's Modular Rail Extreme Cross Bar Systems are comprised of four cross bar lengths and four end support mounting styles to fit most vehicles. The modular bars are manufactured with anodized aluminum alloy for high strength and a light weight.

Rubber buffer strips deliver a quiet ride with no drag or wind noise, while the universal T channel slot allows for extreme carrying of mount accessories. An integrated under-cover slider and measuring system make installation quick and easy.

The Modular Rail Extreme Cross Bar Systems come in four styles: the Door Frame Extended (DFE) Series, used for vehicles with door frame or normal roofs; the Fixed Point Extended (FPE) Series, used for vehicles with fixed mounting point roofs; the Rail Bar Universal (RBU) Series, used for vehicles with raised side rails; and the Rail Bar Extended (RBE) Series, used for vehicles with unique raised or flush side rails.

The Modular Rail Extreme Cross Bar Systems are available as a fully configured kit or for purchase separately in sub kits. ROLA also offers a unique key-alike lock kit in single, four, or eight unit packs. The lock kits – sold separately from the cross bar systems – allow the same key to be used on all ROLA lockable accessories.