Ronstan Series 30 Ball Bearing Block Single Becket Option Lashing
SKU: 35998274047

Ronstan Series 30 Ball Bearing Block Single Becket Option Lashing

Sale price$101.95 Regular price$113.28
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Description

Ronstan Series 30 Ball Bearing Block Single Becket Option LashingSeries 30 Ball Bearing Block Single Becket Option Lashing Ball Bearing Blocks boast the highest strength to weight ratio available. This is achieved through all composite reinforced polymer materials and multiple attachment options. Their precision design provides the optimum number of ball bearings for minimum friction while weight reduction is achieved through the use of fibre reinforced composites in the block head, cleat arms and beckets. Highest

Series 30 Ball Bearing Block Single Becket Option Lashing

Ball Bearing Blocks™ boast the highest strength-to-weight ratio available.  This is achieved through all-composite reinforced polymer materials and multiple attachment options. Their precision design provides the optimum number of ball bearings for minimum friction while weight reduction is achieved through the use of fibre-reinforced composites in the block head, cleat arms and beckets. 

Highest Working Load in its Class

The proven Ronstan 2-stage bearing system (Series 30 and larger) features high compression grade Acetal ball bearings and a secondary full-contact bearing. This gives minimum friction across the full working load range.

The sheave and bearing system is supported by a fibre-reinforced load frame, computer modelled and optimised using advanced stress analysis methods. The Dyneema® Link, used in multi-sheave blocks, is produced from high spec SK75 fibre, which is 10 times stronger and lighter than steel, and provides the final connection from the block to the load point.

Simple, Versatile & Secure Attachment

The single block is easily lashed to an attachment point, and can also accept Dyneema® Links and shackles for a variety of efficient attachment alternatives. The Dyneema® Link used in multi-sheave blocks is easily fitted and secured by a removable pin. The Dyneema® Link can also be removed and replaced by a shackle, custom lashing or strop.

These blocks are far more compatible with Dyneema®/Spectra® lines, carbon laminate connection points and webbing than traditional blocks with steel loop tops or shackles.

Low Profile & Compact

The two way head in the single lashing block allows for alignment at 0° or 90° orientation, while the single swivel block allows for full articulation.

The flexible Dyneema® Link used in multi-sheave blocks provides 0° or 90° orientation. It connects directly to the head of the block rather than to an intermediate head post. This reduces weight and gives the lowest possible profile while allowing full articulation. Beckets have been carefully designed to minimise height.

Features:

  • Lightweight
  • Highest working load in its class
  • Secure, versatile and secure attachement
  • Low profile and compact
  • Ultra low profile thru-sheave becket
  • Self-lubricating Nylatron® sheave and full contact bearing for high dynamic loads

Applications:

  • Mainsheet systems and spinnaker sheets on dinghies to 5M(16')
  • Halyard, vang and backstay applications on boats to 5M(16')
  • Control line applications on larger yachts

Manufacturer Part Numbers: RF35109HL
GRP:WRO
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 35998274047

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Alban Zogaj
Massapequa, US
★★★★★ 4
Great shirts have to iron first
Size: XX-Large Tall, Color: Black
They feel great the material, they’re thin, the style looks good, the length to and below my waist is good. For the cost they’re good shirts and they’re definitely loose fitting, however they shove them in a tight bag so if you plan on wearing this straight away from delivery day make sure you have an iron ready every single collar and I ordered over 7 shirts comes folded over. Took a star away for the fact they don’t pack them how you would find a higher price shirt packed and typically wear ready.
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Reviewed in the United States on December 11, 2025
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God’s own
West Palm Beach, US
★★★★★ 5
Simple and nice.
Size: 4X-Large, Color: Dark Grey
Nice shirt. Light weight. It’s true to size and skin friendly because it is cotton.
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Reviewed in the United States on May 13, 2026
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C. Sizer
Massapequa, US
★★★★★ 5
Perfect!
Size: Large, Color: Beige
Cool, comfortable, with a little stretch. Comes out of the dryer wrinkle free (be sure to hang it up right after you take it out of the dryer) price was reasonable. I measured my husband's neck and it fit exactly as it should. Good length to the back of it too, which is sometimes a problem for my husband. Do not see any quality issues. Not excessively thin or too thick. Really, I can't think of any way to improve on this shirt.
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Reviewed in the United States on April 18, 2026
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Ken Shelley
Omaha, US
★★★★★ 5
Nice and light with superior softness!
Size: Large, Color: Black
Nice soft material and fits well. I also like the lightweight feel. Will most likely buy other colors in this item.
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Reviewed in the United States on April 30, 2026
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Family Man
Fort Morgan, US
★★★★★ 3
Nice shirt, but sizing isn’t ideal for big and tall builds
Size: XX-Large Tall, Color: Black
The shirt itself is decent quality and looks good, but the fit wasn’t great for me. If you’re a big and tall guy, this may not be the best option. The material has some stretch and feels comfortable, but the overall cut runs smaller and doesn’t offer much room in the shoulders or torso. It works better for slimmer or more standard builds. If the sizing works for you, it’s a nice-looking shirt. Just be aware that it’s not very forgiving in the fit if you need extra room.
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Reviewed in the United States on December 31, 2025

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