Product Description With the end caps for Zipp ZM2 front hubs, the 3ZERO MOTO ZM2 Boost wheel can be mounted on forks with a standard bearing surface (approx. 21 mm). Technical Information:Axle Type:15 x 110 mm thru-axleCompatibility:ZM2 front hubs3ZERO MOTO ZM2 Boost WheelManufacturer Number:11.2018.064.001 Only available to European & Russian customers. Contents:2 x Zipp ZM2 end caps Manufacturer: SRAM LLC 1000 W. Fulton Market 4th Floor Chicago IL 60607 USA info@sram.com Distributor: SRAM Europe Sales and Services B.V. Paasbosweg 16 3862 ZS Nijkerk Netherlands info@sram.com