Lewmar 90mm Synchro Block - Single

Upgrade your rigging with the Lewmar 90mm Synchro Block Single, a game-changer for sailors chasing peak performance on the water. This isn't just another block—it's a precision-engineered tool that slashes friction, speeds up line handling, and delivers smoother power transfer from deck to sail. Ideal for competitive racing or demanding cruiser setups, it transforms how you manage mainsheets, travelers, and high-load control lines.

Engineered for Unmatched Efficiency

Lewmar's Synchro series stands out with its scientifically optimized geometry, pairing a Free-Spin bearing system with a self-aligning head. This combo cuts friction by up to 40% compared to standard blocks, meaning less effort to trim sails and faster response during tacks and gybes. Every element—from the rope sheave to the swivel—moves in perfect sync with the line, reducing wear and extending the life of your sheets and halyards.

Picture this: In a breeze, your mainsheet flies through the block with minimal drag, letting your crew focus on tactics rather than muscle. Sailors report easier sheeting even under full load, making it a favorite for offshore passages or regatta circuits.

Built Tough for Real-World Sailing

• Stainless Steel Strap: Boosts strength and corrosion resistance, standing up to saltwater exposure and UV without compromising over time.
• Glass Fiber Reinforced Cheeks: Ultra-stiff design keeps lines from binding or wedging, even when the angle shifts mid-maneuver.
• Tool-Free Sliding Swivel: Innovative locking mechanism for quick, secure attachment—no wrenches needed during setup or adjustments.

These features combine for a block that's not only powerful but also low-maintenance, perfect for boats where every ounce and inch counts.

Key Specs at a Glance

Compact yet robust, it handles lines up to 14mm without flinching, balancing power with a featherlight feel on deck.

Why Synchro Outperforms Standard Blocks

Unlike budget options that bind under load or wear out ropes prematurely, the Synchro Block's bearing tech ensures consistent, low-friction performance. Racers love it for mainsheet systems where split-second adjustments win races, while cruisers appreciate the reduced fatigue on long hauls. It self-aligns to follow the load direction, preventing side-loading that plagues lesser designs. Over time, this means fewer replacements and more time sailing.

Versatile Applications Onboard

Deploy it as a single block in mainsheet cars, spinnaker sheets, or cunninghams. Its 90mm sheave size suits mid-to-large yachts, from 30-50 foots. Pair multiples for multi-purchase systems, or use solo for clean, efficient leads. The becket design simplifies setups, and the swivel keeps everything tangle-free.

Tips for Peak Performance

Inspect bearings seasonally and rinse with fresh water after every sail to maintain that silky spin. Match line diameter precisely for optimal grip and minimal chafe. When installing, align the swivel for straight-line pulls to maximize efficiency. With proper care, it'll serve race after race.