Serfas MR-4 Glass Lens Bar Mirror Color:Black -Warm Thinsulate insulation ideal for

-Warm Thinsulate insulation ideal for deep winter riding

- Threaded bottom bracket shell width (mm)_70 ✔

-Pro level polished cables combined with Slick-Lube liners offer enhanced shifting precision and long-lasting performance

5 inches wide

Serfas MR-4 Glass Lens Bar Mirror Color:Black -Warm Thinsulate insulation ideal forIncrease awareness and visibility of your surroundings as you ride. Features: Blast Resistant Glass Reflective Lens 360 Degree Adjustable Viewing Angle Mounts 21 26mm Diameter Bars (5mm Hex Wrench Required For Install) Eco Friendly High Impact Nylon Fiber Body Specs: Mounts 21mm 26mm Diameter Handlebars Lens: Blast Resistant Glass Color: Black Weight: 119 Grams (Per Side) 238 Grams (Combined Left and Right) Quantity: (1) Mirror Left or Right (Left