Aftermarket Sissy Bars and Passenger Backrests for Harley-Davidson: A Buying Guide

The short answer: Check the upright, pad, side plates and docking hardware as one system. A tall custom sissy bar is not automatically a passenger backrest, and a detachable upright still needs compatible mounts.

An aftermarket sissy bar can add passenger support, provide a mounting point for compatible luggage or give your Harley-Davidson a different look. The choice ranges from compact detachable backrests to tall custom uprights, with different mounting systems and pad options.

Before choosing by height or finish, check how the complete assembly fits your motorcycle, seat and existing accessories.

Check what is included

A product photograph may show a complete backrest even when the listing is for just the upright or pad.

Depending on the design, a complete installation may require:

• A sissy bar upright.
• Side plates or a dedicated mounting assembly.
• A passenger backrest pad and its fixing bracket.
• Docking hardware for a detachable system.
• Additional fitting hardware for use alongside saddlebags or a rack.

Some aftermarket kits include everything needed for the stated application. Others require several separately purchased components. Check the contents before comparing prices.

Do not assume uprights, pads and side plates from different manufacturers will fit together. Even components from the same brand may belong to different systems.

Fixed or detachable?

A fixed sissy bar suits riders who want the backrest fitted permanently. Check whether its mounting plates work with any saddlebag supports or other accessories already attached to the rear of the bike.

A detachable system can be useful if you want passenger support for some journeys and a cleaner appearance for others. It still needs the correct docking kit, and those docking points generally remain on the motorcycle when the backrest is removed.

Check how the release mechanism works, whether a locking option is available and what must be removed to detach the assembly. A system that looks convenient in a photograph may be less practical once luggage is fitted around it.

Choose the height and pad around the passenger

Upright height affects appearance, but passenger support also depends on the pad’s shape and position.

A tall custom sissy bar is not automatically a comfortable passenger backrest. Check whether it accepts a suitable pad and whether the manufacturer intends it for passenger support.

The seat matters too. An aftermarket seat can place the passenger higher, lower, further forwards or further back than the original arrangement. That changes where the pad meets their back.

Where possible, assess the position with the motorcycle safely supported and the passenger wearing their normal riding jacket. They should be able to sit naturally rather than being pushed forwards or having to lean back to reach the pad.

Confirm fitment on your particular bike

Use the full model designation and model year when checking an aftermarket kit. A broad description such as “fits Softail” is not enough to establish compatibility.

Mention changes to the rear mudguard, seat, indicators, suspension and luggage mounts. These can affect the space available or the hardware required.

If you already have docking hardware, identify its manufacturer and part number. Similar-looking docking points do not establish that another brand’s detachable backrest will fit.

For used accessories, ask for part numbers and clear photographs of the mounts. Missing brackets and unidentified spacers can turn an apparent bargain into a difficult fitting job.

Check the backrest and luggage together

A sissy bar, luggage rack and saddlebags need to work as one arrangement.

Check that saddlebag lids can open, detachable fittings remain accessible and the passenger has enough room on the seat. Make sure indicators and the number plate remain unobstructed.

If you plan to use a sissy bar bag, follow the bag manufacturer’s mounting instructions. Establish whether it requires a supporting rack rather than assuming the upright should carry the entire load.

A rack’s load limit still applies when the luggage is strapped to the backrest. Adding more straps does not increase the permitted capacity.

Inspect the mounts and release mechanisms

Follow the manufacturer’s fitting instructions, including specified fasteners, spacers and tightening procedures.

With a detachable assembly, learn how to confirm that both sides are fully engaged. Sitting on the docking points is not the same as being securely latched.

Inspect mounting hardware, pad fixings and docking components at the recommended intervals. Investigate unexpected movement or a latch that becomes difficult to operate rather than compensating with makeshift packing or extra force.

Do not use a sissy bar as a lifting handle or a transport tie-down point unless its manufacturer explicitly approves that use.

Keep passenger comfort in perspective

A backrest is one part of a passenger set-up. It does not compensate for an unsuitable seat, inaccessible footrests or an overloaded motorcycle.

Check the motorcycle’s passenger and load requirements, and follow its guidance for tyre pressures and suspension settings when carrying additional weight.

Before a longer trip, try a short journey together. That gives you a chance to identify an awkward pad position or luggage arrangement while adjustments are still straightforward.

Build the order around the components you already own

Start with the seat, saddlebag supports, rack and any docking hardware currently fitted. Record their manufacturer and part numbers where possible. A close-up of each mounting point is more useful than a distant photograph of an apparently similar backrest on another bike.

For a proposed upright, confirm the required side plates, pad, pad bracket and docking kit. Ask which parts can be reused and which must belong to the same system. Similar spacing or a familiar finish does not establish compatibility.

Compare occasional passenger use with regular touring

A detachable backrest may suit a bike that alternates between solo and passenger journeys, provided its latches remain accessible with the intended luggage. A fixed installation may be more convenient if the assembly will stay on the bike throughout the season. Neither choice settles passenger comfort by itself.

Check pad position against the actual seat and the passenger's normal posture. Changing the seat later can change that relationship. If you also want to carry a backrest bag, identify its support and load requirements separately; passenger support and luggage capacity are different specifications.

Keep the fitting information for future changes

Retain the installation instructions and component numbers. They make it easier to replace a worn pad, identify docking hardware or check a future rack purchase. For a used assembly without identifying information, establish what it is before ordering additional parts to complete it.

The Hogparts view

Choose an aftermarket backrest as a complete system, with a clear idea of how you will use it. Occasional passenger trips, regular touring and a custom styling project can lead to different choices.

Send Hogparts the motorcycle’s model and year, details of the seat and luggage, and photographs of any existing docking hardware. Those details help us check the fitting requirements before you order.

Always follow the accessory manufacturer’s installation instructions and the motorcycle’s passenger and load guidance.

Related guides

For the next part of your research:

• Aftermarket Luggage for Harley-Davidson: Choosing Bags, Mounts and a Practical Set-Up
• Harley-Davidson Seats Buyer’s Guide: How to Choose the Right Seat

About Hogparts

Hogparts UK Ltd is an independent retailer of aftermarket motorcycle parts. We are not affiliated with, authorised by or endorsed by Harley-Davidson.