Specification: Range: round: 30-40T / oval: 30-38T Mounting Standards: BB Mount ISCG08 hole distance: 55.9mm Material: AL7075 alloy&plastic Weight: approx 29g Process: CNC machined Color: Black ACCESSORIES: Fixing bolts and spacers Package Includes: 1 * Chain Guide 2 * Spacers FEATURE: 1.Wild range chainguide angle adjust by rotation within BB Mount Slot. 2.Easy install with bolts and chainline adjusted by spacers. 3.18-Month Warranty and 100% Money Back Guarantee. ADD The Chain Guide to Your Cart, Enjoy The Rides

Note: The Spacers is used to adjust the distance of the top part like the picture, Not used with bolts. Support specification: BB Mount. High-strength material, wear and resistance to deformation. Never drop a chain ever again and double your narrow wide chain ring life.ISCG08 hole distance: 55.9mm. Suit for narrow-wide 30~40T chainring(round chainring), 30~38T chainring(oval chainring), Adjustable design. Extremely easy to install and adjust using a single 4mm Hex tool, without removing your cranks.

Date First Available: April 16, 2017. Best Sellers Rank: #514,715 in Sports & Outdoors. Customer Reviews: 3.8 out of 5 stars 45 ratings 3.8 out of 5 stars. : B06ZZSTLZ8. Batteries Required?: ?No. Batteries Included?: ?No. Item Package Quantity: ?1. Material: ?Aluminum. Color: ?Black. Size: ?BB Mount. Is Discontinued By Manufacturer: ?No. Package Dimensions: ?6 x 4 x 0.9 inches. Item Weight: ?1.58 ounces. Part Number: ?CYSKY. Manufacturer: ?CYSKY.