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Description
Ronstan 75mm Stand-Up, Swivel Core BlockProduct Description Ronstan 75mm Stand Up, Swivel Core Block Features Class leading performance and sleek, contemporary styling Excellent dynamic and high static load performance Less than half the friction of the nearest competitor Durable aluminum alloy cheek plates Central hub hole can be used as a becket take off or tie up point Swiveling head post for full 3 axis articulation Strong precision cast padeye base Resilient rubber stand up boot
Product Description
Ronstan 75mm Stand-Up, Swivel Core Block
Features
Class leading performance and sleek, contemporary styling
Excellent dynamic and high static load performance
Less than half the friction of the nearest competitor
Durable aluminum alloy cheek plates
Central hub hole can be used as a becket take-off or tie-up point
Swiveling head post for full 3-axis articulation
Strong precision cast padeye base
Resilient rubber stand-up boot prevents clatter & block falling down when not loaded
Measurements
Sheave Ø - 3 in.
Max. Rope Ø - 9/16 in.
Max. Cable Ø - in
Pin Ø - in.
M.W.L. - 330 lb.
B. L. - 6600 lb.
Weight - 16.5 oz.
Product Information
Core Blocks™ are a true all round solution. A tuned 2-stage bearing system provides excellent performance across the full working load range with an integrated thrust bearing feature and the resilience to handle high dynamic or static loads. Acetal sheave, alloy cheeks and stainless fixings complete the durable package. For reliability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing.
Universal Bearing
Dynamic and high static load performance
The Ronstan Universal Bearing incorporates our proven 2-stage bearing system
Stage 1 - Under moderate loads, Acetal ball bearings ensure minimum friction.
Stage 2 - Under heavy loads, where deformation of ball bearings alone would result in increased friction, a sliding Acetal bearing on a polished stainless steel race takes over, maintaining low friction performance.
Additionally the ball bearings are configured to act as a thrust bearing between the sheave and cheeks, preventing the sheave from rubbing on the cheeks and causing friction when the line lead in and out of the block isn’t perfect. Particularly important for cheek blocks.
Alloy cheek plates
Block cheeks are manufactured from the highest quality alloy for maximum strength. Material optimization and the cut-away design minimizes weight and allows easy fresh water rinsing of salt and debris from the bearings. Cheek design has been further styled with flaring at the block throat and reduced gap between the cheek and sheave, minimizing rope wear.
Fully articulated stand-up
Stand-up models have a low profile linkage that provides full rotation and articulation. A high strength precision cast padeye minimizes the footprint and a dedicated rubber boot ensures the block is held upright when not loaded.
Applications
Ideal for use on mainsheet, spinnaker sheet, vang, halyard and backstay applications on boats up to 14m (46ft).
General applications on larger yachts.
Alloy sheave models are available for use with wire.
Materials
Sheave: U.V. stabilized acetal or anodized aluminum (AW models).
Cheek plates: Aluminum alloy
Ball Bearings: High compression strength carbon black acetal.
Post & hub: Grade 316 stainless steel.
Padeye: Grade 15.5PH stainless steel
Features
Measurements
Sheave Ø - 3 in.
Max. Rope Ø - 9/16 in.
Max. Cable Ø - in
Pin Ø - in.
M.W.L. - 330 lb.
B. L. - 6600 lb.
Weight - 16.5 oz.
Product Information
Core Blocks™ are a true all round solution. A tuned 2-stage bearing system provides excellent performance across the full working load range with an integrated thrust bearing feature and the resilience to handle high dynamic or static loads. Acetal sheave, alloy cheeks and stainless fixings complete the durable package. For reliability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing.
Universal Bearing
Dynamic and high static load performance
The Ronstan Universal Bearing incorporates our proven 2-stage bearing system
Stage 1 - Under moderate loads, Acetal ball bearings ensure minimum friction.
Stage 2 - Under heavy loads, where deformation of ball bearings alone would result in increased friction, a sliding Acetal bearing on a polished stainless steel race takes over, maintaining low friction performance.
Additionally the ball bearings are configured to act as a thrust bearing between the sheave and cheeks, preventing the sheave from rubbing on the cheeks and causing friction when the line lead in and out of the block isn’t perfect. Particularly important for cheek blocks.
Alloy cheek plates
Block cheeks are manufactured from the highest quality alloy for maximum strength. Material optimization and the cut-away design minimizes weight and allows easy fresh water rinsing of salt and debris from the bearings. Cheek design has been further styled with flaring at the block throat and reduced gap between the cheek and sheave, minimizing rope wear.
Fully articulated stand-up
Stand-up models have a low profile linkage that provides full rotation and articulation. A high strength precision cast padeye minimizes the footprint and a dedicated rubber boot ensures the block is held upright when not loaded.
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
4.3 ★★★★★
Based on 18 reviews
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Product Reviews
★★★★★ 5
Title: Exceptional Comfort and Fit: M MAELREG Hoodies for Men Review
Size: XX-Large, Color: Mg02- Dark Green Heather
I recently purchased the M MAELREG Hoodie for Men, and I must say it has quickly become my go-to choice for comfort and style. This hoodie is not only a great addition to my wardrobe but also a standout performer in terms of softness, fit, and versatility.
One of the standout features of this hoodie is its incredible soft feel. I appreciate the fact that it is comfortable enough to wear without an undershirt, making it perfect for various casual occasions. The fleece material is not only soft against the skin but also provides a cozy warmth without sacrificing breathability.
For those of us who don't conform to the skinny jeans trend, the M MAELREG Hoodie offers a breath of fresh air. The hoodie provides plenty of room without compromising style, making it an excellent choice for those who prefer a more relaxed fit. It's a welcome departure from the snug styles that dominate the market.
I'm 6'3" and 250 lbs, not particularly muscular, and finding a hoodie with the right fit has always been a challenge. However, the XXL size of this sweatshirt exceeded my expectations. It not only has shape but also boasts an impressive arm length of 37-38 inches.
The body length also dropped below the typical fit by a few inches, which I love.
As someone who enjoys golf and various outdoor activities, I appreciate the versatility of this hoodie. It provides the perfect balance for cool weather, keeping me comfortable without feeling bulky or restrictive. The hoodie's design and fit make it suitable for a range of activities, making it a valuable addition to my wardrobe.
In conclusion, the M MAELREG Hoodie for Men stands out for its exceptional softness, roomy fit, and versatility. Whether you're heading out for a round of golf or simply want a comfortable, stylish option for everyday wear, this hoodie delivers on all fronts. I highly recommend it to anyone looking for a reliable, comfortable, and well-fitting sweatshirt that goes beyond the norm.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 28, 2024
★★★★★ 5
Good but sizes vary
Size: XX-Large, Color: Mg03- Dark Blue Snowflake
These are really great and fit well. I like the variety of colors and designs. Only downside is some are tight and some are loose not sure if its because of the different designs or materials.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 10, 2026
★★★★★ 5
Excellent quality & value
Size: X-Large, Color: Mg00- White
Love these hoodies, excellent for golf and the quality is excellent. I brought 3 already of these nice looking hoodies. I own many other Maelreg shirts.
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Reviewed in the United States on May 30, 2026
★★★★★ 5
The perfect casual layer—unbelievably soft!
Size: Large, Color: Burgundy
I am seriously impressed with this hoodie. It’s made from a lightweight jersey material that feels just like a broken-in, high-quality t-shirt. It’s perfect for those transitional weather days when a heavy fleece hoodie would be too warm, or for just lounging around the house. The fit is spot on—not too baggy but with enough room to move comfortably. It washes really well without shrinking or losing its shape. For the price, you absolutely cannot beat the value. I'll definitely be buying a few more colors!
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Reviewed in the United States on May 23, 2026
★★★★★ 5
The Perfect Hoodie for Warm Weather Comfort
Size: XX-Large, Color: Black
I've been on the lookout for something exactly like this... a hoodie with the look and feel of a sweatshirt, but without all that heavy fleece that can become uncomfortable when temperatures rise. This Amazon Essentials Lightweight Jersey Pullover Hoodie turned out to be just the solution I needed.
Right out of the package, I noticed the material felt soft and airy, like a premium-quality T-shirt rather than a traditional hoodie. The lightweight fabric hits just the right balance: thin enough to remain cool and breathable, yet substantial enough to give you that hoodie vibe you're after. This makes it especially great when the weather is too warm for your thicker hoodies but still a bit too breezy for just a tee.
The fit is exactly what I was hoping for... comfortable without being baggy, and relaxed enough to allow easy movement. It drapes nicely, so it never looks awkward or ill-fitting. The hood itself is perfectly sized—not overly bulky, but still practical if you need a bit of coverage. No shrinkage when washed and didn't fade.
I've found this hoodie to be ideal for casual days around town, lounging, or even traveling. It layers well, making it versatile for spring, early summer evenings, or warmer fall days. If you're looking for something comfortable, lightweight, and stylish enough to pull off the hoodie look in warmer weather, this is absolutely worth picking up.
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Reviewed in the United States on July 7, 2025