Chainrings

30 Tooth

This is the only 30 tooth 104 bcd chain ring available with shift ramps.
These rings are CNC machined out of 7075 T6 Aluminum then HARD Anodized black for durability.

Conventional chain ring bolts are not used on these rings. Supplied with the ring are 4 bolts and bushing. The bushing are there to locate the big ring (or Bash Guard) to the spider (see photo).

The bushing are not required with use of my Bash Guard or my 40 tooth big ring

In most cases there will be some minor modifications required on your crank spider. This modification requires filing a bevel on the spider arms near the bolt holes (see photos). This mod will not effect the ability to use conventional chain rings on your cranks. $89.00

Weight is 41 grams

Illustration 1: 30 tooth 104 bcd with shift ramps

Illustration 2: 30 tooth mounted with Bash Guard

40 Tooth

This is the only 40 tooth 104 bcd chain ring available with shift ramps.
These rings are CNC machined out of 7075 T6 Aluminum then HARD Anodized black for durability.

These will only work with my 30 tooth rings and will eliminate the need for the bushings. $55.00

Weight is 66 grams

40 tooth big ring mounted with 30 tooth

40 tooth mounted with 30 and 20 tooth

Mod required for 30 tooth 104 bcd ring