Caliburn - Spiro S1 - 90% Tungsten Darts

Caliburn - Spiro S1 - 90% Tungsten Darts

Repoint in seconds

The Spiro S1's defining feature travels with it: every set ships fitted with Caliburn's EVO replaceable point system, letting you swap worn or bent points in seconds rather than wrestling with a repointing press. It's a system designed to work with the majority of dart brands — but here it comes as standard.

The spiral that names it

Spiro means spiral, and the barrel delivers exactly that: fine spiral grooves machined around the 90% tungsten torpedo in black and silver. The winding cut is shallow by design — a smooth 2/5 that guides rather than grabs, suiting players who steer with hand position and let the swelling torpedo shape do the locating. Two weights are stocked, 23g and 25g, each pack completed with Caliburn stems and flights.

The Caliburn stable

Caliburn's steel range covers plenty of ground: the Sword S3 and Sword S1 step up to 95% tungsten with ringed grips, while the Starship Series Demeter and Hyperion explore bolder shapes.

What's in the Box

• 3 x Spiro S1 90% tungsten dart barrels
• 3 x Caliburn EVO points (fitted)
• 3 x Caliburn stems
• 3 x Caliburn flights

Barrel Dimensions

• 23g -
• 25g -

Technical Specification

Dart Profile

Weight Distribution: Centre
Barrel Profile: Torpedo
Front Profile: Tapered
Point Type: Caliburn EVO - Replaceable

Dart Grip Characteristics

Grip Type: Fine spiral grooves
Grip Level: 2 (1 = Smooth, 5 = Aggressive)
Grip Zone: Full Length

Caliburn - Spiro S1 - 90% Tungsten Darts Contains:

• 3 x Spiro S1 90% tungsten dart barrels
• 3 x Caliburn EVO points (fitted)
• 3 x Caliburn stems
• 3 x Caliburn flights