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Description
Ronstan Orbit Series 55 Fiddle Becket Block w/ Cleat & Swivel HeadProduct Description Ronstan Orbit Series 55 Fiddle Becket Block w Cleat & Swivel Head Features: Ultra Lightweight Low friction 2 stage Orbital ball bearing system Highest working load in its class Low profile and compact High performance cleating Sheave 2 5 32 + 1 3 8 in. (55 + 35mm) Max. Rope 3 8 in. (10mm) Max. Cable in (mm) Pin in. (mm) M. W. L. 110 lb. (500 kg.) B. L. 2200 lb. (1000 kg.) Weight 8. 4 oz. (237 g) Product Information Lightweight
Product Description
Ronstan Orbit Series 55 Fiddle Becket Block w/ Cleat & Swivel Head
Features:
Ultra Lightweight
Low friction 2-stage Orbital ball bearing system
Highest working load in its class
Low profile and compact
High performance cleating
Sheave Ø - 2 5/32 + 1 3/8 in. (55 + 35mm)
Max. Rope Ø - 3/8 in. (10mm)
Max. Cable Ø - in (mm)
Pin Ø - in. (mm)
M.W.L. - 110 lb. (500 kg.)
B. L. - 2200 lb. (1000 kg.)
Weight - 8.4 oz. (237 g)
Product Information
Lightweight
Kilogram for kilogram of working load, BB and RT Orbit Blocks™ are the world’s lightest. The unique orbital design allows the bearing to only be in the active areas of the floating sheave. This minimises the mass of the inactive return race and hub.
Weight and bulk are further reduced in the different block configurations. The ball bearing single and becket block has a through-sheave becket arrangement. The result? The lowest weight possible.
Multi-sheave blocks have only single intermediate cheeks and an ultra-light and efficient head arrangement. This gives a 30% weight saving advantage over the nearest competitor. Other brands just link together their single blocks. This results in unnecessary double cheeks between each sheave, held together by a heavy steel channel across the top of the block.
Highest working load in its class
The orbital ball-bearing arrangement gives the largest possible bearing race diameter. This maximises load performance. The proven Ronstan 2-stage bearing system features high compression grade acetal ball bearings and a secondary full-contact bearing. This gives minimum friction across the full working load range.
The floating sheave and bearing system is supported by a fibre-reinforced load frame. The design was computer modelled to be stress optimised. The Dyneema® Link is produced from FSE Robline SK75 fibre, which is 10 times stronger and lighter than steel, and provides the final connection from the block to the load point.
Applications:
Mainsheet systems on dinghies, sportsboats and small keelboats to 9m (30ft)
Spinnaker sheets on dinghies, sportsboats and small keel boats to 9m (30ft)
Halyard, Vang and Backstay application on boats to 8m (26ft)
Control line applications on larger yachts
Materials:
Ball bearings - High compression strength carbon black Acetal
Stage 2 bearing - Carbon fibre reinforced, PTFE impregnated Nylon
Frame/Cheeks - Toughened, glass fibre reinforced Nylon
Rope Link: UV stabilised, multi-strand impregmented SK75 Dyneema®
Features:
Sheave Ø - 2 5/32 + 1 3/8 in. (55 + 35mm)
Max. Rope Ø - 3/8 in. (10mm)
Max. Cable Ø - in (mm)
Pin Ø - in. (mm)
M.W.L. - 110 lb. (500 kg.)
B. L. - 2200 lb. (1000 kg.)
Weight - 8.4 oz. (237 g)
Product Information
Lightweight
Kilogram for kilogram of working load, BB and RT Orbit Blocks™ are the world’s lightest. The unique orbital design allows the bearing to only be in the active areas of the floating sheave. This minimises the mass of the inactive return race and hub.
Weight and bulk are further reduced in the different block configurations. The ball bearing single and becket block has a through-sheave becket arrangement. The result? The lowest weight possible.
Multi-sheave blocks have only single intermediate cheeks and an ultra-light and efficient head arrangement. This gives a 30% weight saving advantage over the nearest competitor. Other brands just link together their single blocks. This results in unnecessary double cheeks between each sheave, held together by a heavy steel channel across the top of the block.
Highest working load in its class
The orbital ball-bearing arrangement gives the largest possible bearing race diameter. This maximises load performance. The proven Ronstan 2-stage bearing system features high compression grade acetal ball bearings and a secondary full-contact bearing. This gives minimum friction across the full working load range.
The floating sheave and bearing system is supported by a fibre-reinforced load frame. The design was computer modelled to be stress optimised. The Dyneema® Link is produced from FSE Robline SK75 fibre, which is 10 times stronger and lighter than steel, and provides the final connection from the block to the load point.
Applications:
Materials:
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
4.5 ★★★★★
Based on 20 reviews
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Product Reviews
★★★★★ 5
Perfect for my picky dog who cannot do hard treats
Flavor Name: Bacon & Apple, Size: 5 Ounce (Pack of 1)
My dog loves these treats! Good ingredients, great size and value. And perfect for my picky little man. I also love that these don’t have a strong smell!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 29, 2026
★★★★★ 5
My 3 Vote Yes
Flavor Name: Bacon & Apple, Size: 5 Ounce (Pack of 1)
All three of my dogs LOVE these! There aren't a lot in the package for money. But the jerky pieces are big enough and soft enough that I was able to break them to make them last a little longer.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 1, 2026
★★★★★ 5
Tasty treats
Flavor Name: Bacon & Apple, Size: 5 Ounce (Pack of 1)
My dogs love these treats.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 28, 2025
★★★★★ 4
Dog treats
Flavor Name: Bacon & Apple, Size: 5 Ounce (Pack of 1)
Our doggie loves them but not much in the bag.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 24, 2025
★★★★★ 5
Change in quality
Flavor Name: Bacon & Apple, Size: 5 Ounce (Pack of 1)
I have purchased these for a few years directly from Whole Foods, and was excited to see that it was now available from Amazon. The quality has been changing recently. I have these on AutoShip and they’ve gotten increasingly darker in color which I’m assuming means cooked more or longer and they’re incredibly hard now. These are supposed to be a soft chew and I have a Chihuahua and even cutting them up, he can barely eat them. Hoping this feedback gets back to the right people in quality control.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 27, 2023
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