45mm Black Magic Runner Block
45mm Black Magic Runner Block
45mm Black Magic Runner Block
45mm Black Magic Runner Block

45mm Black Magic Runner Block

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Runners are used on running backstays of offshore boats to adjust mast bend for different wind conditions. Integrated sideplate bails and recessed cotter key help produce a smooth design that won't snag lifelines. Sideplates and sheaves Hard Lube-anodized for maximum UV protection and a smooth surface. Center cage keeps Torlon roller bearings separated and parallel to reduce friction. 

Sheave Ø (mm) 45 mm
Sheave Ø (in) 1 3/4 in
Length (mm) 71 mm
Length (in) 2 13/16 in
Weight (g) 82 g
Weight (oz) 2.89 oz
Maximum line Ø (mm) 10 mm
Maximum line Ø (in) 3/8 in
Maximum working load (kg) 750 kg
Maximum working load (lb) 1653 lb
Breaking load (kg) 1500 kg
Breaking load (lb) 3306 lb

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Most orders are shipped within 2 - 5 Days

Shipping rates

Orders delivered to Australian Post Codes attract an $18.00 Flat Rate Shipping Charge* This excludes Bulky or Dangerous Goods


For Bulky Goods, Dangerous Goods and Remote areas.

If the cost to send is vastly different to our standard delivery costs, someone from our team will contact you prior to dispatch to arrange further payment or to issue a refund if you are not happy with the additional charges.

International orders will be charged at $0.00 initially and our staff will be in contact with a shipping quote. If the quote is not accepted the customer reserves the right to cancel their order and be refunded in full.

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