We’ll be closed for the Christmas holidays from 23th Dec. 2024 to 6th Jan. 2025 included. Orders placed after Dec. 18th will be shipped starting 7th January 2025.
Ronstan
Two-speed Mainsheet System Top Blocks Only
BB top block for RF72900 two-speed system
465.16€
On Request
SKU
RF72900T
FEATURES
- Coarse and and fine tuning purchase system
- Unrivalled 18:1 holding power
- Dual sided On-Off switch
- Low friction ball bearing system
- Lightweight
- Cheek cut-outs for easy bearing maintenance
PRODUCT INFORMATION
Two-speed mainsheet systems allow both coarse and fine tuning in a single purchase system. The system allows fine tuning of the mainsheet when sailing upwind by using one of the sheet tails and keeping the other cleated. Using both the sheets at once allows the trimmer to blow off the main quickly when rounding the top mark and trim on quickly when hardening up after rounding the bottom mark. When fitting to traveller cars, ensure adequate support for the bottom block and use stand-up spring kit RF324-1 or RF324-2. (Refer to traveller section for more information).
APPLICATIONS
- Two-Speed systems: Mainsheets on sportsboats and keel boats to 12m (40ft)
- Mainsheets on sportsboats and keelboats to 12m (40')
- Max. mainsail area, END boom sheeting = 42sq m (452 sq ft)
- Max. mainsail area, MID boom sheeting = 27sq m (290 sq ft)
MATERIALS
- Carbon Black Acetal ball bearings
- U.V. stabilised Acetal sheaves, alloy ratchet sheaves
- Alloy cheeks
- Torlon® ratchet pawl
- Adjustable cleat arms
TECHNICAL DATA
| Sheave Ø | 75 + 50 mm |
|---|---|
| Max. Rope Ø | 10 mm |
| Max. Cable Ø | - mm |
| Pin Ø | - mm |
| M.W.L. | 1100 kg |
| B. L. | 2300 kg |
| Weight | 575 g |