Bicycle front sprocket
Methods and apparatus for a composite bicycle front sprocket are disclosed herein. One embodiment discloses a composite bicycle front sprocket assembly having an outer assembly of a first material. The bicycle front sprocket assembly also has a center assembly of a second material. The center assembly is disposed at least partially within the outer assembly. The center assembly is irremovably coupled with the outer assembly. The center assembly is irremovably coupled with the outer assembly without an external fastening device to irremovably couple the center assembly with the outer assembly.
1. A bicycle front sprocket assembly comprising:
an outer assembly comprising a first material; and
a center assembly comprising a second material, wherein said first material has a higher modulus of elasticity than said second material,
said center assembly disposed at least partially within said outer assembly,
said center assembly irremovably coupled with said outer assembly, and
said center assembly irremovably coupled with said outer assembly without an external fastening device to irremovably couple said center assembly with said outer assembly;
a crank drive ring disposed approximately about a center of said outer assembly,
said crank drive ring irremovably coupled with said center assembly,
said crank drive ring irremovably coupled with said center assembly without an external fastening device to irremovably couple said crank drive ring with said center assembly.
2. The composite bicycle front sprocket of claim 1 , wherein said outer assembly is aluminum.
3. The composite bicycle front sprocket of claim 1 , wherein said center assembly is a composite material.
4. The composite bicycle front sprocket of claim 1 , wherein said center assembly is carbon fiber reinforced plastic.
5. The bicycle front sprocket assembly of claim 1 , wherein said outer assembly comprises:
a plurality of teeth on an outer perimeter of said outer assembly; and
a plurality of tabs on an inner perimeter of said outer assembly.
6. The bicycle front sprocket assembly of claim 5 , wherein at least one tab of said plurality of tabs comprises:
a tapered shape, the tapered shape comprising:
a narrower length at a first portion connected with the inner perimeter of said outer assembly; and
a wider length at a second portion furthest from the inner perimeter of said outer assembly.
7. The bicycle front sprocket assembly of claim 5 , wherein said center assembly is irremovably coupled with said plurality of tabs of said outer assembly.
8. The bicycle front sprocket assembly of claim 5 , wherein said center assembly is about and encases said plurality of tabs of said outer assembly,
the center assembly being irremovably coupled with said plurality of tabs of said outer assembly.