Round AERO for SRM Power Meter 104 BCD MTB

Chainring 1-speed narrow-wide Round for SRM Power Meter 104 BCD MTB AERO

Size: 32T
Color: Black

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Processing time: up to 10 business days


Shipping time: 2 to 7 business days. Provided by FedEx

  Return Policy

You can return an unused product within 30 days

The original AERO design ALUGEAR chainring 



  • Weight: 32T- 38g; 34T- 46g; 36T- 54g; 38T- 61g; 40T- 68g

  • Diameter: 32T- 138,6mm; 34T- 148mm; 36T- 154,2mm; 38T- 161,3mm; 40T- 171mm

  • Material: 7075-T6 aluminum

  • Made: CNC milling

  • Surface coating: Anodizing



  • For PowerMeter: SRM Origin MTB 104 mm BCD 4-bolts

  • Compatible with all common cranks that have a 104 BCD 4-arm bolt circle diameter

  • We have designed universal teeth that work with other chains as well: SRAM chains - 11sp, 12sp Eagle, 12sp T-Type;  Shimano chains - 11sp, 12sp HG+; KMC chains



The chainrings are characterized by a quiet running of the chain and good self-cleaning in muddy conditions. With the alternating narrow wide tooth profile, which is matched to the bicycle chains, the chainrings keep the chain always securely in place. The chainrings are available with 32 to 40 teeth

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 11 and 12-speed drives

The tooth profile is specially designed for use with MTB chains

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



  • Use Bolts and Nuts for mounting: 5mm Nuts and 6,5mm Bolts are required

  • Tool holder: Nut 6mm and Bolt 5mm hexagon socket, maximum permissible torque: 10 Nm

  • We recommend the use of an increased cage tension system rear derailleur for the best chain security

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

  • It is recommended to use a well-lubricated chain on every ride



Data sheet

for 104 BCD

Specific References

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