Fitment: The first thing you should consider is the size of the speakers and where they will be installed on your motorcycle. The available space in your fairings, handlebars, or custom mounts will dictate the size of the speakers you can install. Make sure to measure the available space carefully to ensure the speakers you choose will fit properly.

Weatherproofing: Given that motorcycles are exposed to the elements, choosing speakers that are weatherproof or marine-grade is crucial. Weatherproof speakers are designed to withstand conditions like rain, moisture, and temperature fluctuations, which makes them a durable choice for motorcycle use.

Performance at High Speeds: At high speeds, ambient noise levels can be quite high, so you'll want speakers that have excellent sound output and clarity under these conditions. Look for speakers with higher sensitivity ratings and sufficient power-handling capabilities to ensure that the audio quality remains good even when you're riding fast.

Power Handling: Consider how much power the speakers can handle, especially if you plan to connect them to an external amplifier. Make sure the speakers can handle the wattage to avoid distortion and potential damage.

Installation: Some coaxial speakers are easier to install than others, so consider whether you'll be installing them yourself or hiring a professional. The complexity of installation could also affect your choice.