2Pcs Bike Bicycle Chain guide Adjustable Chain Protector, Systeem BB mount

Description:

Suit for narrow-wide 30-40T chainring (round chainring), 30-38T chainring(oval chainring), Adjustable design.
Support specification: BB mount. High-strength material, wear and resistance to deformation.
Simple, effective, adjustable, Super Light, durable & great value.
Designed for single ring set-ups to keep your chain in place and avoid it dropping off.
They are simple to install.

Specification:

Material: 7075 aluminum alloy, Nylon

Length: 10cm / 3.94inch

Color: Black, Red

Package Includes:

2 Pieces of Chain Guide(1xBlack, 1xRed)
4 Pieces of Spacers