All-City QR x 135 mm Bicycle Rear Hubs
About All-City - "All-City's goal is to make a significant contribution to the equipment and culture of urban cycling. This is not a cash in, this is not a fad, this is our life, our love, our community and our dream. We are a company of riders making products for other riders."
This is hub spacing and is the width of the hub. It must match your frame specifications.