ALUGEAR ELM Boost chainrings are some of the lightest chainrings on the market. Using experience and vigorous testing, Alugear 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.

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, such as 10, 11, and 12-speed drives. The Narrow Wide teeth guide the chain reliably.

The tooth profile is specially designed for use with MTB chains.

Technical Specifications of the Alugear ELM Narrow Wide Boost Chainring:

• Offset : BOOST - 3,0mm
• Chainline: 52mm
• Weight: 28T- 48g; 30T- 53g; 32T- 59g; 34T- 66g; 36T- 70g
• Diameter: 28T- 124mm; 30T- 131,5mm; 32T- 138,6mm; 34T- 148mm; 36T- 154,2mm

Compatibility:

• For cranks MTB SRAM 3-bolts Direct Mount axle type: GXP, DUB, BB30.
• For Cane Creek eeWing cranksets.
• Chainrings should use with Boost rear hubs 148mm
• MTB chainrings you may use the following chains: all 10sp, 11sp, 12sp (including 12sp SRAM Eagle) and 10sp, 11sp, 12sp Shimano chains.

Recommendations:

• Use the standard chainring bolts supplied with the cranksets.
• Alugear recommends the use of a clutch system rear derailleur for the best chain security.
• It is also a good idea to use a new chain with your new ALUGEAR chainring.