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Ronstan Series 20 Ball Bearing Block - Single - Cheek Rivet Mount MPN - RF20151A SKU: 55136
MPN: RF20151A- $26.91
$29.60- $26.91
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Series 20 Ball Bearing Block - Single - Cheek Rivet MountFeatures: Low friction High static and dynamic load capacity Lightweight Suitable for screw or pop rivet mounting Precision molded Acetal sheaves running on stainless steel or Torlon® ball bearings provide high performance & low...- $26.91
$29.60- $26.91
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Ronstan Series 20 Ball Bearing Block - Single - Cheek MPN - RF20151 SKU: 55134
MPN: RF20151- $21.25
$23.38- $21.25
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Series 20 Ball Bearing Block - Single - CheekFeatures: Low friction High static and dynamic load capacity Lightweight Double through-bolt mounting for maximum load capacity Precision molded Acetal sheaves running on stainless steel or Torlon® ball bearings provide high performance & low friction Applications:...- $21.25
$23.38- $21.25
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Ronstan Series 20 Ball Bearing Block - Single - Loop Top Becket MPN - RF20111 SKU: 55133
MPN: RF20111- $19.83
$21.81- $19.83
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Series 20 Ball Bearing Block - Single - Loop Top BecketFeatures: Low friction High static and dynamic load capacity Lightweight Precision molded Acetal sheaves running on stainless steel or Torlon® ball bearings provide high performance & low friction Can be fitted with a shackle...- $19.83
$21.81- $19.83
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Ronstan Series 20 Ball Bearing Block - Single - Loop Top MPN - RF20101 SKU: 55132
MPN: RF20101- $15.54
$17.09- $15.54
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Series 20 Ball Bearing Block - Single - Loop TopFeatures: Low friction High static and dynamic load capacity Lightweight Precision molded Acetal sheaves running on stainless steel or Torlon® ball bearings provide high performance & low friction Can be fitted with a shackle in...- $15.54
$17.09- $15.54
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Ronstan Series 20 Ball Bearing Block - Single MPN - RF20100 SKU: 55131
MPN: RF20100- $27.22
$29.94- $27.22
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Series 20 Ball Bearing Block - SingleFeatures: Low friction High static and dynamic load capacity Lightweight Precision molded Acetal sheaves running on stainless steel or Torlon® ball bearings provide high performance & low friction Applications: Dinghy control lines Dinghy Vangs Cunninghams Traveller controls Materials:...- $27.22
$29.94- $27.22
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Ronstan Series 30 Fiddle Block - Narrow with Tube Rivet Head & V-Jam Cleat MPN - RF187 SKU: 55130
MPN: RF187- $45.97
$50.57- $45.97
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Series 30 Fiddle Block - Narrow with Tube Rivet Head & V-Jam CleatFeatures: Lightweight durable construction Economical Maintenance free Allows fast, sure cleating of control lines Hollow rivets accept fixing screws, shackles or can be used as a becket for extra purchase Stainless steel...- $45.97
$50.57- $45.97
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Ronstan Series 30 Fiddle Block - Narrow with Tube Rivot Head MPN - RF186 SKU: 55129
MPN: RF186- $39.83
$43.81- $39.83
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Series 30 Fiddle Block - Narrow with Tube Rivet HeadFeatures: Lightweight durable construction Economical Maintenance free Hollow rivets accept fixing screws, shackles or can be used as a becket for extra purchase Stainless steel cheeks and Acetal sheaves ensure a long service life with...- $39.83
$43.81- $39.83
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Ronstan Series 30 Block - Single - Narrow MPN - RF185 SKU: 55128
MPN: RF185- $23.77
$26.15- $23.77
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Series 30 Block - Single - NarrowFeatures: Lightweight durable construction Economical Maintenance free Hollow rivets accept fixing screws, shackles or can be used as a becket for extra purchase Stainless steel cheeks and Acetal sheaves ensure a long service life with virtually no maintenance...- $23.77
$26.15- $23.77
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Ronstan Kite Block - Black with White Sheave (Pair) MPN - RF13101-2 SKU: 55071
MPN: RF13101-2- $18.70
$20.57- $18.70
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Kite Block - Black w/White SheaveFeatures: Lightweight durable construction Economical Maintenance free Applications: Vang, cunningham and trapeze retriever systems on dinghies Leech line tackles, bunk adjusters etc on larger yachts Materials: U.V. stabilized Acetal sheaves Nylon cheeks Specifications:Sheave Ø:16mm(5/8")Max. Rope Ø:4mm(5/32")- $18.70
$20.57- $18.70
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Ronstan Wire Block with Removable Clevis Pin Head - Nylatron® Sheave - 25mm (1") Sheave Diameter MPN - RF418C SKU: 55036
MPN: RF418C- $34.29
$37.72- $34.29
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Wire Block w/Removable Clevis Pin Head - Nylatron® Sheave - 25mm(1") Sheave DiameterWire blocks have purpose designed narrow sheaves and grooves.Features:Removable clevis pin headApplications:Wire blocks suit halyards, vang and backstay applicationsMaterials: Grade 316 stainless steel cheeks Nylatron® sheave Specifications:Sheave Ø: 25mm(1")Max. Cable Ø: 3mm(1/8")M.W.L:450kg(990lbs)B.L.:...- $34.29
$37.72- $34.29
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Ronstan Wire Block - Tubular Rivet Head with Nylatron® Sheave - 25mm (1") Sheave Diameter MPN - RF418 SKU: 55035
MPN: RF418- $31.01
$34.11- $31.01
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Wire Block - Tubular Rivet Head w/Nylatron® Sheave - 25mm Sheave DiameterWire blocks have purpose designed narrow sheaves and grooves.Applications:Wire blocks suit halyards, vang and backstay applicationsMaterials: Grade 316 stainless steel cheeks Nylatron® sheave Specifications:Sheave Ø: 25mm(1")Max. Cable Ø: 3mm(1/8")M.W.L:450kg(990lbs)B.L.: 900kg(1,980lbs)Weight: 40kg(1.4oz)- $31.01
$34.11- $31.01
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Ronstan Wire Block - Ferrule Top with Removable Nylontron® Sheave - 45mm (1-34/") Sheave Diameter MPN - RF104 SKU: 55034
MPN: RF104- $55.07
$60.58- $55.07
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Wire Block - Ferrule Top w/Removable Nylatron® Sheave - 45mm(1-3/4") Sheave DiamterWire blocks have purpose designed narrow sheaves and grooves.Removal sheave for easy fitting and without cutting the wire terminationFeatures: Flared cheeks to minimise chafing Removable sheavesApplications:Wire blocks suit halyards, vang and backstay applicationsMaterials:...- $55.07
$60.58- $55.07
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Ronstan Wire Block - Tubular Rivet Head with Removable Nylatron® Sheave - 45mm (1-3/4") Sheave Diameter MPN - RF103 SKU: 55033
MPN: RF103- $58.05
$63.86- $58.05
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Wire Block - Tubular Rivet Head w/Removable Nylatron® Sheave - 45mm(1-3/4") Sheave DiameterWire blocks have purpose designed narrow sheaves and grooves.Removal sheave for easy fitting and without cutting the wire terminationFeatures: Flared cheeks to minimise chafing Removable sheavesApplications:Wire blocks suit halyards, vang and backstay...- $58.05
$63.86- $58.05
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Ronstan Race Sheave - Acetal Solid Bearing - 66mm (2-5/8") OD MPN - RF1765 SKU: 55032
MPN: RF1765- $13.12
$14.43- $13.12
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Race Sheave - Acetal Ball Bearing - 66mm(2-5/8") ODPrecision moulded Acetal sheaves running on Acetal or Torlon® ball bearings provide high performance & low friction.Acetal Sheaves: Choice of bearings Solid bearing - high strength and durability, utilizing the self-lubricating properties of Acetal U.V. resistant...- $13.12
$14.43- $13.12
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Ronstan Race Sheave - Acetal Solid Bearing - 50mm (1-15/16") OD MPN - RF1759 SKU: 55030
MPN: RF1759- $8.74
$9.61- $8.74
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Race Sheave - Acetal Ball Bearing - 50mm(1-15/16") ODPrecision moulded Acetal sheaves running on Acetal or Torlon® ball bearings provide high performance & low friction.Acetal Sheaves: Choice of bearings Solid bearing - high strength and durability, utilizing the self-lubricating properties of Acetal U.V. resistant...- $8.74
$9.61- $8.74
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Ronstan Series 40 AP Sheave - Acetal Solid Bearing - 40mm (1-9/16")OD MPN - RF41000 SKU: 55029
MPN: RF41000- $9.90
$10.89- $9.90
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Series 40 AP Sheave - Acetal Solid Bearing - 40mm(1-9/16")ODPrecision moulded Acetal sheaves running on Acetal or Torlon® ball bearings provide high performance & low friction.Acetal Sheaves: Choice of bearings Solid bearing - high strength and durability, utilizing the self-lubricating properties of Acetal U.V....- $9.90
$10.89- $9.90
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Ronstan Race Sheave - Acetal Solid Bearing - 28mm (1-1/8") OD MPN - RF128 SKU: 55027
MPN: RF128- $5.81
$6.39- $5.81
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Race Sheave - Acetal Ball Bearing - 28mm(1-1/8") ODPrecision moulded Acetal sheaves running on Acetal or Torlon® ball bearings provide high performance & low friction.Acetal Sheaves: Choice of bearings Solid bearing - high strength and durability, utilizing the self-lubricating properties of Acetal U.V. resistant...- $5.81
$6.39- $5.81
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Ronstan Series 25 T-Track - Composite Slide - Series 40 BB Orbit Block™ - Stand Up - Suits 9mm(5/16") Rope MPN - RC72536S SKU: 55019
MPN: RC72536S- $119.68
$131.65- $119.68
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Series 25 T-Track - Composite Slide - Series 40 BB Orbit Block 153; - Stand Up - Suits 9mm(5/16") RopeFor small keel boats and sportsboats T-track jib leads are a great blend of performance and functionality in a simple, efficient package. Composite slide bodies...- $119.68
$131.65- $119.68
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Blue Performance Hammock with Forestay Suspension MPN - PC190 SKU: 97901
MPN: PC190- $293.05
$322.36- $293.05
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Hammock with Forestay SuspensionThe Blue Performance hammock has a superior design that gives the hammock its well-known marine credentials.Features: Mesh center panel for cool comfort Reinforced hem for durability Webbing panels for strength Specifications (L x W):P190: (inch) 87.7 x 47.2 / (mm) 2100...- $293.05
$322.36- $293.05
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Blue Performance Stay Protection - Medium MPN - PC891 SKU: 97899
MPN: PC891- $41.85
$46.04- $41.85
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Stay Protection - MediumThe Blue Performance Stay Protection cover is a cover for the stay rigging screws, that protect ropes, sails, and the crew.Features: Waterproof, mildew, and UV-resistant PVC Velcro fixture Specifications (L x W):Medium: (inch) 18.7 x 3.7 / (mm) 475 x 95Use:PC891...- $41.85
$46.04- $41.85
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Frequently Asked Questions
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Repack bearings annually or every 10,000 miles with marine-grade grease to prevent water intrusion and seizing. Check for play or heat after each launch.
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Hubs are sized by axle spindle (1-1/16", 1-3/8", 1-3/4"); match brake type (electric/drum/hydraulic) and bolt pattern (4/5/6 on 4.5-6.5" centers).
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Transom savers, tie-down straps, and fenders protect hulls during towing; LED light kits ensure visibility, while bunks/rollers reduce launch friction.
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Use bow/stern straps rated for 2x boat weight, cross-strap hull sides, and check bunks for even weight distribution to avoid stress cracks.
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Choose 1,200-2,000 lb capacity for tongue weights up to 10% of trailer GVWR; crank or A-frame jacks for easy boat positioning.

