Check the listing for details. MTB Tools Adapter Set For a 12mm x 142mm Rear Hub to 148mm Boost Application. Condition: New. Listed at 21.95 USD. This adapter set will allow the installation of a 12mm x 142mm hub on a 148mm Boost type frame. Two types are available, single sided 6mm offset, which includes one 6mm hub spacer for the brake side and a 6mm brake rotor spacer with screws. This type will maintain the factory intended chainline but will require the wheel to be dished due to the 6mm offset. The second type is centered and includes two 3mm hub spacers and a 3mm rotor spacer and screws. This type will alter the chainline by 3mm, but will require no additional modifications at installation. Many other adapters, tools and components are available in the MTB Tools store. International shipping is available. Please be aware that international shipping can include delays involving any number of postal and or customs organizations. Delays can occur at any point within these systems. All items are shipped within 24 hours unless otherwise noted. Once a package has been turned over to the postal service no seller has any control or influence over the shipment, handling or destination of any package. Customs fees and local taxes are the sole responsibility of the buyer. The seller has no control over the imposition or collection of these potential charges. As a responsible eBay seller MTB Tools does not commit or contribute to customs fraud of any kind. Please be aware that there are several sellers on eBay claiming to sell MTB Tools products. They are foreign counterfeiters attempting to defraud buyers with substandard copies of our parts. All genuine MTB Tools products are produced in our factory in El Cajon, CA, USA. MTB Tools products are sold only in this store and at mtbtools.com. Check the username before you buy, if it isn’t mtbtools, you can’t be sure what you will get. I am very sorry to have to suspend international shipping at this time. We want to help with everything you need, but the current world situation has made international postage unacceptably risky.We have resumed international shipping as of 7/15/2020. Thank you for your patience.