Bike Chain Stabilizer Universal Bicycle Chain Guide Positive Negative

Bike Chain Stabilizer Universal Bicycle Chain Guide Positive Negative Teeth Single Disc Protector for MTB Mountain Bike Features: Bike chain stabilizer can effectively prevent chain drop and chain jump. High-quality aluminum alloy, fine workmanship, durable and wear-resistant. Small in size and light in weight, it will not burden your riding. Suitable for single disc to make riding more stable and enhance your riding experience. Easy to install, the bottom bracket and crank need to be removed during installation, suitable for mountain bikes. (Applicable to threaded bottom bracket, press-in bottom bracket is not currently supported.) Specifications: Model: Professional Type/ Simple Type(optional) Color: Black/ Red(optional) Material: Aluminum Alloy + Nylon Applicable: For threaded BB bottom bracket(Press-in bottom bracket is not currently supported) Item Size: Professional: 80 * 60 * 25mm/ 3.1 * 2.4 * 1.0in                 Simple: 105 * 55 * 20mm/ 4.1 * 2.2 * 0.8in Item Weight: Professional: 43g/ 1.5oz                      Simple: 30g/ 1.1oz Package Size: 105 * 75 * 27mm/ 4.1 * 3.0 * 1.1in Package Weight: Professional: 87g/ 3.1oz                            Simple: 65g/ 2.3oz Packing List: 1 * Chain Stabilizer 2 * Wrench