ALUGEAR 2-speed crown with original AERO design
TECHNICAL SPECIFICATIONS
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Intended Use: 2×12 speed for road bike and time trial
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Weight: 50 teeth - 112g; 52 teeth - 127g; 54 teeth - 143g; 34 teeth - 26g; 36 teeth - 29g; 40 teeth - 40g
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Optimal crown combinations: 50-34; 52-36; 54-40
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Mounting position: external 50T; 52T; 54T; internal 34T; 36T; 40T
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Bolt circle diameter: 110 mm Shimano Asymmetric
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Fixing: Spider 4 Arm
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Material: 7075-T6 Aluminum
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Production: CNC Milling
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Surface coating: Anodizing
COMPATIBILITY For Shimano 2×12 speed cranksets with asymmetric 110 mm bolt circle diameter (4 arms): FC-R7100; FC-R8100 (P); FC-R9200 (P). The chainrings are compatible with the 12 speed cranksets FC-R8100-P; FC-R9200-P with original PowerMeter. With the chainrings you can use the following chains: 12sp Shimano, 12sp KMC
INFORMATION ALUGEAR chainrings are among the lightest on the market. Using experience and rigorous testing, Alugear has modified the arm design and strategically machined the chainrings to make only minimal sacrifices in terms of impact resistance in exchange for large gains in weight reduction. With unique tooth profiles, the mounting and climbing aids allow the chainrings to shift particularly smoothly and quickly. The chainrings have been specially tuned with climbing aids and can only achieve their superior shifting performance in the combinations supplied by Alugear. The chainrings are CNC milled from 7075 T6 aluminum and industrially hard coated anodized to provide protection from mechanical impacts, a beautiful appearance and an excellent tactile feel to each of the chainrings that lasts. A unique tooth profile eliminates chain noise, reduces wear and ensures smooth operation across the entire system of all common drivetrain combinations. The tooth profile is specially designed for use with road chains.
RECOMMENDATIONS For a better look, you can use ALUGEAR AERO COVER (for 105 R7100, Ultegra R8100, R8100-P or Dura-Ace R9200, R9200-P cranksets). Additionally, you can use ALUGEAR chainring nuts and bolts for assembly: 7mm nuts and 6.5mm bolts are needed. It is also a good idea to use a new chain with the new ALUGEAR chainrings. It is recommended to use a well-lubricated chain on each ride. It is recommended to use the optimal combination of ALUGEAR 2-speed chainrings. The correct functioning of the double set is only guaranteed by using ALUGEAR outer and inner chainrings together. Tool holder: 5mm hex socket maximum permissible torque: 10Nm
INSTALLATION INSTRUCTIONS on the Alugear website
Includes: 1x outer chainring and 1x inner chainring (without Aero cover, without nuts and screws!)
