Which one fits a Retrospec Rover trailer?

The Rover coupler. It is the factory part for Retrospec Rover kids', cargo, and pet trailers and attaches at the rear axle nut. The Jingzan adapter is a generic M10 x 1.0 thread-on part and is not listed for Retrospec trailers.

Will the Jingzan fit my bike?

Only if your rear axle is a solid, nutted axle with M10 x 1.0 male threads. It does not fit quick-release or thru-axle bikes. Measure the thread pitch before ordering.

Do I need two couplers for two bikes?

Yes, if you want both bikes ready to tow. The Rover listing is one coupler; the Jingzan pack already includes two adapters and two flange nuts.

Which is more durable?

The Jingzan is 304 stainless steel, which resists rust better. The Rover is weather-resistant alloy steel and should be checked for corrosion, especially if you ride in winter or near salt.

Is the Jingzan worth it over the Rover?

Only if your axle matches its M10 x 1.0 thread. For a Retrospec trailer on a Retrospec bike, the Rover coupler is the safer fit and includes hardware.

Does the Rover coupler include everything to attach the trailer?

It ships with hardware, but one reviewer noted it is one of two pieces needed to attach the trailer. Confirm you have the trailer-side part before you ride.

Rover Bike Trailer Coupler Attachment vs Jingzan 2-Pack M10 x 1.0 Bicycle Trailer Hitch Adapter for Nutted Solid Axles, 304 Stainless Steel Axle Mount Adapters with Flange Nuts

Buy the Rover coupler if you own a Retrospec Rover kids', cargo, or pet trailer and want the factory part that bolts to the rear axle nut. Buy the Jingzan 2-pack if you have a bike with an M10 x 1.0 solid threaded rear axle and need a generic hitch adapter, or want a spare for a second bike. The Rover is a single angled coupler; the Jingzan is a two-pack of straight stainless adapters with flange nuts. Check your axle type and thread pitch before ordering either.

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