The Wolf Tooth B-RAD XL Strap and Accessory Mount allows you to carry accessories on your bike frame instead of in jersey pockets or backpack. Wolf Tooth B-RAD XL Features Securely strap 3-4.75 diameter items like jackets, bags, growlers, hydration bottles, and more Lightweight, durable, rust-proof materials Includes the mounting plate, strap and associated ED-coated hardware Extremely grippy and flexible strap with reflective tab and foam pad B-RAD XL Strap and Accessory Mount System Compatibility Requires a B-RAD base to mount to your bike Compatible with any frame that uses standard 64mm spacing bottle cage braze-ons (basically every modern frame) Securely straps items 75-120mm in diameter B-RAD - Bottle Relocation & Accessory Device An innovative, flexible system for organising on-bike bottle storage and accessories. Customise storage to your specific needs with the flexible 3-step B-RAD system. How it works: B-RAD Base - Available in a variety of lengths Attaches to bottle cage mounts on bike Provides platform for the B-RAD system B-RAD Mount Attaches to B-RAD Base Secures accessories to the Base Accessory-specific mounts available Accessories Held in place by B-RAD mounts or straps Carry ride essentials like bottles or tools