J/105 Fleet Tip: Mast Crash Pads and Why Every Boat Needs One

If you race a J/105 on San Francisco Bay, you know the sound. The jib sheet shackle — or worse, the clew ring — swings forward during a tack and contacts the forward face of the mast. Then again. Then again. After a season of racing, the anodizing is gone, the aluminum is pitted, and you have a stress-concentration point in a spar that costs serious money to replace.

The carbon crash pad is the fix. We build them for the J/105 fleet as a regular production run, and we custom-build them for any boat with similar problems.

Construction: we use a layup of carbon, glass, and Kevlar — the combination gives us a part that's thin enough to fit flush against the spar section, light enough not to matter for weight-aloft calculations, and tough enough to absorb repeated impact from shackle hardware. The Kevlar component is the key to durability under point-load impact. Carbon alone is stiff but brittle under repeated strikes; Kevlar absorbs the shock.

Fit: the pad runs from deck level up to gooseneck height, covering the impact zone. We can mold to any spar section geometry, and we can extend coverage to other high-wear areas — around the gooseneck, at batten car tracks, anywhere repeated contact happens.

Install: adhesive bond and mechanical fastening through existing holes where available. Takes under two hours on a J/105 with the boom removed.

If you're replacing a pad that's already beaten up, we can often match the profile of the original. Call the shop with your spar brand and section dimensions and we'll get you on the build schedule.