Description:

Made of CNC aluminum alloy material: Anti-rust, lightweight and practical

Designed for bike chain ring updating such as upgrading your standard chainring ratio 50/39T to 50/34T (Compact Cranks ) or 56/44T (TIME race)

To reduce the noise and friction by chain while you changing cycling speed

Additional angle of 4° shim prevents your front derailleur hiting the chain ring

3mm thick shim solves the problem that your front derailleur can't reach your chain ring

Specification:

Material: Aluminium Alloy

3mm(Thickness):

Length: 2omm/0.78inch

Bolt hole diameter: 5mm/0.2 inch

4°:

Length: 2omm/0.78 inch

Bolt hole diameter: 5mm/0.2 inch

The thickness: 2mm; The other ends' thickness: 0.8mm

Package Includes:

1 Piece Bike Front Derailleur Shim

Note:

Please allow slightly difference due to manual measurement. Color may be slightly different since different monitor. Thanks!