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Precision CNC machined AL7075/T6
Shifting ramps and stainless steel pins for smooth shifting
Laser etched logo with CNC machined silver detail

Precision CNC machined AL7075/T6
Laser etched logo with CNC machined silver detail

Replacement chromoly drive sprockets for Bosch E-Bikes
Durable chromoly construction ensures dependibility and long wear characteristics

FSA`s steel megatooth 4 bolt chainrings are perfect for MTB and E-MTB bikes with heavy-footed power riders
Long tooth profile enhances chain retention
Thick Thin tooth design for maximum chain engagement
Compatible with all 9, 10, and 11 speed chains as well as Sram 12s Eagle chains
Not compatible with Shimano 12s or Sram 12s road chains

FSA`s rendition of the Narrow/Wide chainring for 1x10/11 drivetrains
Features longer teeth and diamond shaped alternating profile to keep constant chain contact
Longer tooth profile helps to reduce noise and quickly shed mud
High grade anodized AL7075/T6 construction

104mm/4B alloy chainrings for double cranksets
Compatible with Shimano and Sram 104mm 4-bolt 10sp cranks
Ramped and pinned for specific chainring combinations for precise and reliable shifting - see spec column for details

Replacement sprockets for use with Bosch E-bike drivetrains
High quality manufacturing and hardening processes make the Connex sprockets for Bosch `new era` E-bike series extremely resistant
Perfect for the Performance Line CX, Performance Line and Active Line drive systems
1/2` x 3/32`

FSA`s rendition of the Narrow/Wide chainring for 1x10/11 drivetrains
Features longer teeth and diamond shaped alternating profile to keep constant chain contact
Longer tooth profile helps to reduce noise and quickly shed mud
High grade anodized AL7075/T6 construction

Replacement sprockets for use with Bosch E-bike drivetrains
High quality manufacturing and hardening processes make the Connex sprockets for Bosch `new era` E-bike series extremely resistant
Perfect for the Performance Line CX, Performance Line and Active Line drive systems
1/2` x 3/32`

Replacement chromoly E-Bike sprockets for Shimano drive trains
Durable chromoly construction design to take the increased torque and wear from electic motors

Replacement E-Bike chainrings for Bosch Gen 3 and 4 drivetrains
New tooth design provides vastly improved chain retention and interface
Gen 3 and 4 available in multiple tooth counts, and multiple chainlines for Gen 4 chainrings

104mm/4B alloy chainrings for double cranksets
Compatible with Shimano and Sram 104mm 4-bolt 10sp cranks
Ramped and pinned for specific chainring combinations for precise and reliable shifting - see spec column for details

Made in the USA from 6061-T6 aluminum alloy, Box Two BMX Chainrings are round and true
They fit 104 BCD four-bolt cranks and are available in black anodized with laser-etched graphics from 38 to 45-teeth

Precision CNC machined AL7075/T6
Laser etched logo with CNC machined silver detail

FSA`s rendition of the Narrow/Wide chainring for 1x10/11 drivetrains
Features longer teeth and diamond shaped alternating profile to keep constant chain contact
Longer tooth profile helps to reduce noise and quickly shed mud
High grade anodized AL7075/T6 construction

Replacement E-Bike chainrings for Bosch Gen 3 and 4 drivetrains
New tooth design provides vastly improved chain retention and interface
Gen 3 and 4 available in multiple tooth counts, and multiple chainlines for Gen 4 chainrings

FSA`s rendition of the Narrow/Wide chainring for 1x10/11 drivetrains
Features longer teeth and diamond shaped alternating profile to keep constant chain contact
Longer tooth profile helps to reduce noise and quickly shed mud
High grade anodized AL7075/T6 construction

Made in the USA from 6061-T6 aluminum alloy, Box Two BMX Chainrings are round and true
They fit 104 BCD four-bolt cranks and are available in black anodized with laser-etched graphics from 38 to 45-teeth

104mm - 4 bolt E-bike Narrow/Wide chainrings for use with Bosch-III, Yamaha, Brose and Bafang E-bike drivetrains
High quality hardened construction offers a better than original replacement/upgrade
Black KTL coating

Made in the USA from 6061-T6 aluminum alloy, Box Two BMX Chainrings are round and true
They fit 104 BCD four-bolt cranks and are available in black anodized with laser-etched graphics from 38 to 45-teeth

Precision CNC machined AL7075/T6
Shifting ramps and stainless steel pins for smooth shifting
Laser etched logo with CNC machined silver detail

Box Four narrow/wide chainring for use with the wide ratio Box Four drivetrain
The tooth profile and thicknesses are tailored to match the inside geometry of the unique Box Four chain
Intended for use with the Box Four drivetrain only - may not function ideally with other 8 speed drivetrains

Made in the USA from 6061-T6 aluminum alloy, Box Two BMX Chainrings are round and true
They fit 104 BCD four-bolt cranks and are available in black anodized with laser-etched graphics from 38 to 45-teeth

Replacement Sram/Truvativ chainring bolt sets

Made in the USA from 6061-T6 aluminum alloy, Box Two BMX Chainrings are round and true
They fit 104 BCD four-bolt cranks and are available in black anodized with laser-etched graphics from 38 to 45-teeth

Made in the USA from 6061-T6 aluminum alloy, Box Two BMX Chainrings are round and true
They fit 104 BCD four-bolt cranks and are available in black anodized with laser-etched graphics from 38 to 45-teeth

104mm - 4 bolt E-bike chainrings for use with Bosch-III, Yamaha, Brose and Bafang E-bike drivetrains
High quality hardened construction offers a better than original replacement/upgrade
Black KTL coating

Replacement sprockets for use with Bosch E-bike drivetrains
High quality manufacturing and hardening processes make the Connex sprockets for Bosch `new era` E-bike series extremely resistant
Perfect for the Performance Line CX, Performance Line and Active Line drive systems
1/2` x 3/32`

Direct mount steel chainrings for use with Bosch Gen4 equipped E-Bikes
FSA megatooth profile teeth for positive chain retention and performance
For use with boost 148 spacing
Compatible with all 9, 10, and 11 speed chains as well as Sram 12s Eagle chains
Not compatible with Shimano 12s chains or Sram 12s Road chains

Replacement Sram/Truvativ chainring bolt sets