Specialized Unveils Crux DSW: Lightest Alloy Gravel Frame Ever

What Makes the Crux DSW a Lightweight Marvel?

Specialized has introduced the Crux DSW, an aluminium gravel bike they claim is the lightest in its class. Weighing just 1399 grams for a 56cm frame, this bike aims to combine durability with impressive performance. The complete bike weighs 9.37kg, setting a new standard for lightweight gravel bikes.

How Does D'Aluisio Smartweld Technology Enhance the Frame?

The Crux DSW owes its lightweight and strength to Specialized’s D'Aluisio Smartweld (DSW) technology. This method, also used in the Allez Sprint, involves hydroforming, which uses high-pressure fluid to shape the aluminium. This precise technique ensures stronger and lighter joints, as the tubes meet exactly as the engineers intend without the need for additional shaping or "mitring."

The frame's construction includes a single-piece downtube and bottom bracket, which forms the core structure. The remaining tubes are then welded to this section, allowing for added material in high-stress areas. This results in a durable frame without the extra weight typical of older welding methods.

Key Features of the Crux DSW

Smartweld Technology: The DSW process, also used in the Allez Sprint, enhances the frame's strength and durability by adding material at the ends of the tubes where they are welded.
Frame Construction: A single-piece downtube and threaded bottom bracket form the core of the Crux DSW, with the other tubes welded to this section. This design places extra material in high-stress areas, optimizing ride performance without overbuilding the frame.
Geometry and Fit: The Crux DSW retains the performance-oriented geometry of the carbon Crux, offering an extended reach and low stack for a balanced ride. The 72mm bottom bracket drop provides stability and nimbleness, crucial for gravel riding.
Fork and Tyre Clearance: Paired with a Fact 12r carbon fork, the Crux DSW offers tyre clearance up to 47mm, or 2.1 inches with a 650B wheel, making it versatile for various terrains.

How Much Does the Crux DSW Cost and When Will It Be Available?

The Crux DSW frameset is available in two color options: Gloss Amber Glow and Satin Metallic Spruce, priced at $1,700. For those looking for a complete build, it comes in Gloss Birch/Clay and Satin Smoke/Oak Green for $2,600. The complete bike features 12-speed SRAM Apex components, 40T x 11-44t gearing, DT G540 wheels, and Specialized Pathfinder Pro 38mm tires.

Technical Specifications for the Crux DSW Frameset

Specification	Details
Price (preorder)	$1,700
Frameset
Frame	Specialized E5 Premium Aluminum Disc frame with D'Aluisio Smartweld Technology, hydroformed aluminum tubing, tapered head tube, threaded BB
Seat Binder	Specialized Alloy, 30.8mm
Suspension
Fork	S-Works FACT Carbon, 12x100mm thru-axle, flat-mount disc
Weight
Weight	1.98kg (4 lb, 5.8 oz)
Weight Size	56

Technical Specifications for the Specialized Crux DSW Comp

Specification	Details
Price	$2,600
Stem	Specialized, 3D-forged alloy, 4-bolt, 7-degree rise
Handlebar	Specialized Adventure Gear, 118.9mm drop x 70mm reach x 12º flare
Fork	S-Works FACT Carbon, 12x100mm thru-axle, flat-mount disc
Seatpost	Alloy, 2-bolt Clamp, 12mm offset, 27.2mm, anti-corrosion hardware
Crankset	SRAM APEX XPLR, 40t
Shifters	SRAM APEX, 12sp
Saddle	Body Geometry Power Sport, steel rails
Derailleur: Rear	SRAM APEX XPLR, Mechanical
Cassette	SRAM PG 1231, XPLR, 11-44
Chainrings	40t
Bottom Bracket	SRAM DUB BSA 68 Wide
Front Brake	SRAM APEX, Hydraulic Disc
Rear Brake	SRAM APEX, Hydraulic Disc
Frame	Specialized E5 Premium Aluminum Disc frame with D'Aluisio Smartweld Technology, hydroformed aluminum tubing, tapered head tube, threaded BB
Wheels / Rim	Front - DT G540, Centerlock Disc, Tubeless Ready, 25mm internal widthRear - DT G540, Centerlock Disc, Tubeless Ready, 25mm internal width
Front Tyre	Pathfinder Pro 2BR, 700x38
Rear Tyre	Pathfinder Pro 2BR, 700x38
Tube	48mm Presta Valve, 700X28-38
Weight	9.37 kg
Colours	Gloss Birch/Clay and Satin Smoke/Oak Green