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The RAP-B-101-231-OT1U is a marine grade aluminum handlebar or rail mount base with a ZINC u-bolt, COMPOSITE standard sized length arm and marine grade aluminum 2.5 inch diameter adapter plate. This mount DOES NOT INCLUDE a cradle or holder. 

• Warranty: Manufacturer's, RAM Mounts (National Products Inc.), Limited Life Time Warranty.
• Click on individual links to view more information.
• Included Base: RAM-B-231ZU black powder coated marine grade aluminum motorcycle handlebar or universal rail base with 1 inch diameter rubber ball.
  • Fits rail diameter from .5 to 1.25 inches.
  • Includes 1 inch zinc u-bolt that fits rail diameter from .75 to 1 inch.
  • Includes 1.25 inch zinc u-bolt that fits rail diameter up to 1.25 inches.
  • Includes two nuts, u-bolt plastic caps and the RAP-319 composite reducer that allows a rail diameter down to .5 inch when used with the 1 inch zinc u-bolt.
• Optional Stainless Steel U-bolts:
  • RAM-HAR-SU251 1.0 inch stainless steel u-bolt, is available. 
  • RAM-SU2512U 1.25 inch stainless steel u-bolt, is available. 
• Included Arm: RAP-B-201U composite standard sized length arm for 1 inch balls.
  • Measures 2.875 inches between socket centers.
  • Measures 3.6875 inches in overall total length.
  • The arm allows for easy adjustment by loosening the plastic side knob, a single spring inside the arm opens the sockets, allowing the arm to pivot on the attached base accessory. This enables the arm and accessories to be positioned at various angles allowing the ultimate in position flexibility. Loosen the knob completely and the arm will disconnect from the accessories.
• Included Adapter: RAM-B-202U marine grade aluminum 2.5 inch diameter round plate with attached 1 inch diameter rubber ball.
  • Pre-drilled holes and compatible with the AMPS hole pattern. The adapter will connect to RAM cradles (RAM-HOL-xxxx series) and third party cradles with the AMPS hole pattern.
    
  • NOTE: The RAM-B-238U diamond shaped adapter is more commonly used for most RAM Cradles and Holders.