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Description
Ronstan Series 40 BB Double Block w/ Swivel Head & BecketProduct Description Ronstan Series 40 BB Double Block w Swivel Head & Becket Sheaves running on Acetal or Torlon ball bearings provide high performance & low friction. The 2 stage ball bearing system provides consistent performance over the full load range. Features: Low friction Acetal or Torlon bearing system Lightweight Cheek cut outs for easy bearing maintenance Specifications: Sheave 1 9 16 in. (40mm) Max. Rope 3 8 in. (10mm) Max. Cable in (mm)
Product Description
Ronstan Series 40 BB Double Block w/ Swivel Head & Becket
Sheaves running on Acetal or Torlon® ball bearings provide high performance & low friction. The 2-stage ball bearing system provides consistent performance over the full load range.
Features:
Low friction Acetal or Torlon® bearing system
Lightweight
Cheek cut-outs for easy bearing maintenance
Specifications:
Sheave Ø - 1 9/16 in. (40mm)
Max. Rope Ø - 3/8 in. (10mm)
Max. Cable Ø - in (mm)
Pin Ø - in. (mm)
M.W.L. - 1100 lb. (500 kg)
B. L. - 2650 lb. (1200 kg)
Weight - 5 oz. (142 g)
Applications:
Mainsheet
Halyard
Vang
Spinnaker control lines on off-the-beach catamarans, one design classes and sportsboats up to 8m (26ft)
Sheaves running on Acetal or Torlon® ball bearings provide high performance & low friction. The 2-stage ball bearing system provides consistent performance over the full load range.
Features:
Specifications:
Applications:
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- 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
4.3 ★★★★★
Based on 8 reviews
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Product Reviews
★★★★★ 5
Top quality
Size: 1 Quart, Style: 6-Pack, Pattern Name: Motor Oil, Configuration: 5W-30
Best motor oil, better than mobile one ! Wish they made ultra platinum in high mileage 🙏🏻
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 12, 2026
★★★★★ 5
Made from Natural Gas
Size: 1 Quart, Style: 6-Pack, Pattern Name: Motor Oil, Configuration: 5W-30
Made of Natural Gas...
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 8, 2026
★★★★★ 5
Very good option
Better than the oiled version, if you're not chasing track performance. Fit perfectly into my Accord. I still get 34MPG, so it's at least as good or better than OEM, and still better than other options you'll find. No complaints here.
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Reviewed in the United States on March 12, 2026
★★★★★ 5
Late and damaged box
Nice but arrived to late
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Reviewed in the United States on February 16, 2026
★★★★★ 5
Amazing Product!!!
It’s a great fit for my 2017 Honda accord! And there was defiantly improved function in my car! It defiantly saves me money and is a good price for what it is. It also made my car smell a thousand times better!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 20, 2025
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