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Ronstan Series 30 BB Block, Linked With Series 20 Block

Note: Some prices may reflect updates due to international tariffs. Learn the latest about tariffs

Tariff Updates

We are observing how the tariffs are behaving. Lots of our products are imported from Europe and some of the manufacturers are not providing heads up about price increases. We will do everything in our power to hold the best prices, but please consider that in these uncertain times we may be forced to increase the prices without previous notification.

We really appreciate your understanding and look forward to working with you.

What does this mean for you?

  • Some imported products may show a higher price than usual.
  • Prices may change as shipping rates adjust globally.
  • We are committed to providing the best possible pricing and transparency at all times.

How we’re handling it:

  • We only adjust prices when absolutely necessary.
  • We continuously monitor shipping rates and update pricing accordingly.
  • We’ll clearly notify you if a product is affected by tariffs.

Questions? Feel free to contact our team for any clarification or assistance.

Updated: April 2025

MSRP: $41.01
$34.85
(You save $6.16 )
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SKU:
RONRF30285
UPC:
9316800258468
Availability:
Y
Weight:
0.50 LBS
Shipping:
Calculated at Checkout.
Size:
30 mm
Manufacturer part #: RF30285 1

Technical Description
Series 30 BB Linked With Series 20 Block
1 3/16 in + 3/4 in
30 mm + 20 mm
5/16 in + 1/4 in
8 mm + 6 mm
550 lb
250 kg
1210 lb
550 kg
1.6 oz
44 g
Manufacturer part #: RF30285Ronstan Series 30 Ball Bearing Blocks

  • Low friction 2-stage ball bearing system provides consistent performance over the full working load range
  • High static and dynamic load capacity
  • Light weight
  • Versatile head fittings

  • Sheaves running on Acetal or Torlon° ball bearings provide high performance & low friction. The 2-stage ball bearing system provides consistent performance over the full load range.

    Applications
  • Primary lead blocks on dinghies and catamarans
  • Control lines on larger yachts
  • Dinghy barber haulers
  • Spinnaker pole launching systems

  • Materials
  • U.V. stabilised Acetal sheaves
  • Acetal ball bearings
  • Impact modified, fibre reinforced and U.V. stabilised Nylon cheeks
  • Grade 316 stainless steel load straps and head fittings