Ronstan Indicator Strip

The Ronstan Indicator Strip is an essential tool for sailors, cruisers, and racing enthusiasts who demand precision in wind and sail trim. Whether you're managing telltales during competitive racing or maintaining proper sail shape on a long coastal passage, this lightweight indicator delivers visual feedback that translates directly into boat speed and efficiency.

Mounted on your leech, luff, or batten pockets, the strip helps you optimize angle of attack and maintain peak performance across varying wind conditions—critical for both performance and safety on the water. Ronstan engineered this indicator strip with marine-grade durability, designed to withstand saltwater exposure, UV degradation, and constant wind load without deterioration. Its 9-inch length provides ample visibility from the helm while remaining compact enough to avoid aerodynamic disruption.

Racers benefit most from multiple strips positioned at different heights to monitor sail shape across the full chord, while cruisers typically install one or two for basic trim reference. The indicator works on any sail fabric and is compatible with both mainsails and jibs on monohulls and multihulls. Easy installation requires only basic fastening, with no special tools or permanent alterations to canvas.