Chainring Outer ROUND AERO 2-speed for Shimano 110 BCD 4 holes Asymmetrical Dura-Ace R9200, Ultegra R8100, 105 R7100 (12 speed)

The original AERO design ALUGEAR chainring 2-speed

TECHNICAL SPECIFICATIONS

• Intended to use: 2×12 speed for Road and Time Trial bike

• Weights: 50 teeth – 112g; 52 teeth – 127g; 54 teeth – 143g; 56 teeth - 171g

• Mounting position: outside of the crank

• Bolt circle diameter: 110 mm Shimano Asymmetric

• Attachment: 4-arm spider

• Material: Aluminum 7075-T6

• Made: CNC milling

• Surface coating: Anodizing

Delivery includes: 1 x outer chainring

(without Inner chainring, Aero cover, without nuts and bolts)

COMPATIBILITY

• For Shimano 2×12 speed cranks with 110 mm Asymmetrical bolt circle diameter (4-arms): 105 FC-R7100; Ultegra FC-R8100 (P); Dura-Ace FC-R9200 (P)

• The chainrings are compatible with 12-speed cranks FC-R8100-P; FC-R9200-P with Original PowerMeter

• Compatible with ALUGEAR Inner Сhainring only

• Chainrings you may use the following chains: 11sp, 12sp Shimano; 12sp KMC chains

• Shifting: 2x12 speed (only for use with double system and front derailleur)

INFORMATION

ALUGEAR chainrings are some of the lightest chainrings on the market. Using our experience and vigorous testing, we tweaked the arm design and strategically machined the chainrings so that only minimal sacrifices were made in impact strength in exchange for large gains in weight reduction

With special tooth profiles, mount and climbing aids allow chainrings a particularly soft and fast switching. So with them a shift under load easily. The chainrings have been specially tuned by climbing aids and can only achieve their superior shifting performance in the combinations provided by Alugear

The chainrings are CNC machined from 7075 T6 aluminum and hard coat industrially anodized to provide protection from mechanical impacts, a good look, and an excellent tactile feel to each of the chainrings that lasts a long time
A unique tooth profile eliminates chain noise, reduces wear, and provides smooth operation on the entire system of all the most common combinations drive trains

The tooth profile is specially designed for use with Road chains

ALUGEAR chainrings are the best choice if you are looking for a technologically sound chainring with a unique design and low weight

RECOMMENDATIONS

• For the best appearance you may use ALUGEAR AERO COVER (for 105 R7100; Ultegra R8100, R8100-P; Dura-Ace R9200, R9200-P cranks)

• Also you may use ALUGEAR chainring bolts and nuts for mounting

• It is also a good idea to use a new chain with your new ALUGEAR chainrings

• Optimum chainring combinations: 50-34; 52-36; 54-40

• We recommend using the optimal ALUGEAR 2-speed chainring combinations

• The correct operation of the double set is guaranteed only when using ALUGEAR outer and inner chainrings together

• Please remember that when replacing chainrings (especially when altering the size of the outer chainring), it is necessary to adjust the front derailleur

Delivery includes: 1 x outer chainring (without Inner chainring, Aero cover, without nuts and bolts!)