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Description
Ronstan Orbit Series 55 Fiddle Block w/ Becket & Swivel HeadProduct Description Ronstan Orbit Series 55 Fiddle Block w Becket & 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. 1100 lb. (500 kg.) B. L. 2200 lb. (1000 kg.) Weight 3. 6 oz. (101 g.) Product Information: Lightweight
Product Description
Ronstan Orbit Series 55 Fiddle Block w/ Becket & 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. - 1100 lb. (500 kg.)
B. L. - 2200 lb. (1000 kg.)
Weight - 3.6 oz. (101 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. - 1100 lb. (500 kg.)
B. L. - 2200 lb. (1000 kg.)
Weight - 3.6 oz. (101 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
4.2 ★★★★★
Based on 552 reviews
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Product Reviews
★★★★★ 5
Great Wiper for an Older Car!
Size: 24" and 20", Style: Water Repellency
Great Wiper, Great Fit, Great Delivery on Time and Great Reliability!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 23, 2026
★★★★★ 5
Perfect Fit & Easy Install — Replaced Faulty Blade from Another Set
Size: 17", Style: Latitude Repellency
This 17" Rain-X blade ended up replacing a faulty 17" blade from a 5 PLUS set (24"/17"/12") I originally installed.
The 17" from that set had a defective internal adapter — it wouldn’t seat properly on the wiper arm & was extremely difficult to remove. Once I got it apart, the adapter looked warped or misformed. Rather than deal with a full return, I replaced just the 17" with this Rain-X blade.
Installation on the Rain-X was quick & straightforward — it locked in properly with no issues.
Performance so far is solid:
Smooth wipe
No streaking
No excess sound
Good contact across the windshield
Now I’m effectively running a side-by-side comparison (Rain-X 17" vs 5 PLUS 24"/12"), & I’ll update later if anything changes over time.
Overall, this blade did exactly what I needed — simple install & reliable performance.
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Reviewed in the United States on April 3, 2026
★★★★★ 5
Incredible visibility upgrade for my Corolla!
Size: 24", Style: Latitude Repellency
I swapped my old, streaky blades for these Rain-X Latitudes on my 2005 Corolla, and the difference is night and day. The "2-in-1" feature actually works; after a few minutes of use, the water just beads off the glass, even when the wipers aren't on full speed. They were very easy to install with the included adapters and they wipe completely silent without any chatter. If you're prepping for a long road trip or just want better visibility in the rain, these are worth every penny.
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Reviewed in the United States on April 27, 2026
★★★★★ 4
Great wipers!
Size: 24" and 19", Style: Water Repellency
Works very well, leaves the film for the water to bead off which is what I love about it! Still leaves it a little streaky when I us the washer fluid but I don’t know if it’s just the ones I got or not. Still love them because they work!!
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Reviewed in the United States on March 14, 2026
★★★★★ 5
Great Product. Srongly recomends.
Size: 12 Fl Oz (Pack of 1)
I use this product in my SUV it never lets me down. Long lasting and keeps my power steering smoth and easy. Strongly recommended for ALL HONDA and ACURA vehicles. Low cost for a great value product. You will feel the difference comparedto other brand products.If you are looking foe a great power steering fluid look no further
BUY Genuine Honda Power Steering Fluid.
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Reviewed in the United States on April 6, 2026