Are you trying to figure out how to attach a bike trailer to a bike without using the coupler attachment?
Perhaps you don’t have the coupler that came with the bike trailer. Or maybe your particular trailer is not compatible with your bike.
Regardless of the reason, there are some important things to know before you decide to DIY your bike trailer coupler!
Is it possible to attach a bike trailer without a hitch coupler?
It is not recommended to attach a bike trailer to a bike without using a hitch coupler. The coupler is designed as a safety mechanism to ensure that the trailer does not detach while riding. It is crucial to have the proper coupler attachment for your bike trailer.
Why do bike trailers need the coupler attachment?
A bike trailer coupler is a small attachment that connects the rear wheel of your bike to the hitch arm of the bike trailer. The coupler securely attaches the bike trailer using a security pin, which allows you to quickly attach and detach the bike trailer.
There are a few reasons you may need a new coupler:
- Your coupler broke
- You want one for another bike
- Or you bought a used bike trailer that did not come with one
It can be a hassle to go out and get a new coupler, so below you can find some on Amazon for under $15 that will deliver right to your door.
Can you DIY a bike trailer coupler?
Unless you are an extremely skilled welder, it is strongly recommended to just spend $10-$15 to get a new coupler. It’s worth the investment!
Although not recommended, it is possible to attach a bike trailer without a coupler, but only if you are a highly-skilled welder. Some individuals that prefer to DIY their coupler attachment
How do bike trailers attach?
Bike trailers either attach to the axle of the rear wheel or to your bike’s seat post.
In most cases, you’ll be able to easily attach your new bike trailer right out of the box, with all accessories included. Specifically, if your bike’s rear wheel has a standard quick-release (skewer that goes through the center of the wheel), then most trailers will attach easily to your bike.
Some types of bikes, however, may require a simple adapter in order to attach the trailer. Typically, bikes that have thru-axle wheels or hooded-style dropouts may require an adapter.
If you have disc brakes on your bike, be sure to read this article on attaching to disc brakes.
Where to get the proper coupler for your bike trailer for under $15
These coupler attachments all have over 4.1-star ratings on Amazon and are under $15. Buying a coupler really isn’t an expensive investment if it gives you access to a working bike trailer!
Coupler for InStep and Schwinn Bike Trailers
Price: Under $15 (check price here)
Schwinn and InStep made updates to their bike trailers after November 2016 that use this newer style of coupler attachment. Most notably, this coupler will fit a thru-axle bike.
ODIER Steel Hitch for Burley Bike Trailers
Compatible with: Burley bike trailers
Price: Under $10 (check price here)
Thule Bike Trailer EzHitch with Quick Release
Compatible with: Thule bike trailers
Price: Around $50 (check price here)
Potential issues with disc brakes
Most bike trailer couplers are compatible with disc brake bikes right out of the box, unless you have a 12mm thru-axle. In particular, Burley and Thule bike trailers may require you to purchase an extra attachment in order to adapt the bike trailer hitch to work with a 12mm thru-axle.
Although it is possible to attach any bike trailer coupler with any style of disc brakes (with the right adapter), it is important to note that not all brands of bike trailers play nicely with the almighty disc brake.
Burley trailers and Thule trailers in particular are notorious for being incompatible with disc brakes.
If you have disc brakes, you must read this guide on disc brakes and bike trailers.
The process of getting the right coupler attachment for your bike trailer is rather straightforward. The only issue that you might come across is if you have a thru-axle disc brake bike. In that case, just read this article on disc brakes and you’ll be set.
Need help finding the right bike trailer?
If you need help finding the right bike trailer for you, my recommended trailer for most people is the Swhinn Joyrider, which is an affordable double-seater that converts beautifully to a stroller. Check out my full review with photos here.
Check out the Ultimate Guide to Buying a Bike Trailer for more help with choosing a trailer. I also have compiled a list of the top bike trailers for every common situation, which you can check out here.