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Ronstan Series 20 Ball Bearing Block - Double - 2-Axis Shackle Head MPN-RF20202 SKU: CWR-55139
MPN: RF20202- $42.77
$38.88- $42.77
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Series 20 Ball Bearing Block - Double - 2-Axis Shackle HeadFeatures: 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 Two-Way head can be fixed at...- $42.77
$38.88- $42.77
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Ronstan Series 20 Ball Bearing Block - Upright Lead MPN-RF20171 SKU: CWR-55137
MPN: RF20171- $30.55
$27.77- $30.55
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Series 20 Ball Bearing Block - Upright LeadFeatures: Lead blocks are a low profile solution for leading halyards or other rig sail controls back to cleats or jammers Precision molded Acetal sheaves running on stainless steel or Torlon® ball bearings provide high performance &...- $30.55
$27.77- $30.55
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Ronstan Series 20 Ball Bearing Block - Single - Cheek Rivet Mount MPN-RF20151A SKU: CWR-55136
MPN: RF20151A- $29.02
$26.38- $29.02
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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...- $29.02
$26.38- $29.02
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Ronstan Series 20 Ball Bearing Block - Single - Cheek MPN-RF20151 SKU: CWR-55134
MPN: RF20151- $22.91
$20.83- $22.91
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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:...- $22.91
$20.83- $22.91
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Ronstan Series 20 Ball Bearing Block - Single - Loop Top Becket MPN-RF20111 SKU: CWR-55133
MPN: RF20111- $21.38
$19.44- $21.38
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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...- $21.38
$19.44- $21.38
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Ronstan Series 20 Ball Bearing Block - Single - Loop Top MPN-RF20101 SKU: CWR-55132
MPN: RF20101- $16.76
$15.24- $16.76
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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...- $16.76
$15.24- $16.76
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Ronstan Series 20 Ball Bearing Block - Single MPN-RF20100 SKU: CWR-55131
MPN: RF20100- $29.36
$26.69- $29.36
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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:...- $29.36
$26.69- $29.36
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Ronstan Series 30 Fiddle Block - Narrow w/Tube Rivet Head & V-Jam Cleat MPN-RF187 SKU: CWR-55130
MPN: RF187- $49.58
$45.07- $49.58
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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...- $49.58
$45.07- $49.58
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Ronstan Series 30 Fiddle Block - Narrow w/Tube Rivot Head MPN-RF186 SKU: CWR-55129
MPN: RF186- $42.96
$39.05- $42.96
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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...- $42.96
$39.05- $42.96
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Ronstan Series 30 Block - Single - Narrow MPN-RF185 SKU: CWR-55128
MPN: RF185- $25.63
$23.30- $25.63
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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...- $25.63
$23.30- $25.63
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Ronstan Kite Block - Black w/White Sheave (Pair) MPN-RF13101-2 SKU: CWR-55071
MPN: RF13101-2- $20.16
$18.33- $20.16
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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")- $20.16
$18.33- $20.16
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Ronstan Wire Block w/Removable Clevis Pin Head - Nylatron® Sheave - 25mm (1") Sheave Diameter MPN-RF418C SKU: CWR-55036
MPN: RF418C- $36.98
$33.62- $36.98
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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.:...- $36.98
$33.62- $36.98
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Ronstan Wire Block - Tubular Rivet Head w/Nylatron® Sheave - 25mm (1") Sheave Diameter MPN-RF418 SKU: CWR-55035
MPN: RF418- $33.44
$30.40- $33.44
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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)- $33.44
$30.40- $33.44
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Ronstan Wire Block - Ferrule Top w/Removable Nylontron® Sheave - 45mm (1-34/") Sheave Diameter MPN-RF104 SKU: CWR-55034
MPN: RF104- $59.39
$53.99- $59.39
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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:...- $59.39
$53.99- $59.39
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Ronstan Wire Block - Tubular Rivet Head w/Removable Nylatron® Sheave - 45mm (1-3/4") Sheave Diameter MPN-RF103 SKU: CWR-55033
MPN: RF103- $62.60
$56.91- $62.60
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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...- $62.60
$56.91- $62.60
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Ronstan Race Sheave - Acetal Solid Bearing - 66mm (2-5/8") OD MPN-RF1765 SKU: CWR-55032
MPN: RF1765- $14.15
$12.86- $14.15
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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...- $14.15
$12.86- $14.15
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Ronstan Race Sheave - Acetal Solid Bearing - 50mm (1-15/16") OD MPN-RF1759 SKU: CWR-55030
MPN: RF1759- $9.43
$8.57- $9.43
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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...- $9.43
$8.57- $9.43
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Ronstan Series 40 AP Sheave - Acetal Solid Bearing - 40mm (1-9/16")OD MPN-RF41000 SKU: CWR-55029
MPN: RF41000- $10.68
$9.71- $10.68
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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....- $10.68
$9.71- $10.68
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Ronstan Race Sheave - Acetal Solid Bearing - 28mm (1-1/8") OD MPN-RF128 SKU: CWR-55027
MPN: RF128- $6.27
$5.70- $6.27
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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...- $6.27
$5.70- $6.27
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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: CWR-55019
MPN: RC72536S- $129.06
$117.33- $129.06
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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...- $129.06
$117.33- $129.06
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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.