These pieces allow you to connect your eBike to the Single Wheel Cargo Trailer. While our single wheel trailers are compatible with many eBike brands, some models may require specific adapters for proper connection. For compatibility information specific to your non-Bakcou eBike, we recommend visiting Robert Axle Project - the industry leader in axle compatibility solutions. Hitch Compatibility Guide: 3/8 26TPI #P-HCTH Compatible with: Mule and Storm models Note: All new trailer orders include this standard hitch, but you can order this if you need a replacement or additional hitches. Comes as the set. 10mmx1 #JMSSWT Compatible with: Mule Jager and Storm Jager model Jager Scout #JSSWT Compatible with: Scout Jager and Mav3 models 229mm 1.5TPI Compatible with: Scout model 12mmx1.25 Compatible with: Flatlander, Grizzly, Timberwolf, and Kodiak models