There are several ways but first one is pretty common.

https://www.youtube.com/watch?v=7HR4w-TAL-w

https://www.youtube.com/watch?v=01miLV2Yn6M

https://www.youtube.com/watch?v=VcLcFRQvf-k

https://www.youtube.com/watch?v=F1lyM1D4-Cs

Yeah - I don't think you'll get something better than eyeballs and a test ride here. Visually - I tend to think your eyes are playing tricks on you. You can go by feel on the road if you think you need to pull the handlebars one way or another - as long as you feel your bike goes where you point it, it's fine,.

I've always wondered why there wasn't at least a visual aid, better some sort of mechanical linkage. I suppose standardizing it across manufacturers would be somewhat challenging, though no more than lots of other things that are standardized.

You know there is a tool for that:



But seriously I just eyeball it and think that tool might help prevent the bars from shifting on you but won't make them perfectly square (but still close enough though).

Tune makes a laser guide.

https://cyclingtips.com/...ignment-tool-review/

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Alex Arman

Strava

How does the tool above help align the handlebars to the front wheel? To me, it only helps to make the handlebars square to the top tube.

That bike stand keeps the fork square with the frame/rear wheel.

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ECMGN Therapy Silicon Valley:
Depression, Neurocognitive problems, Dementias (Testing and Evaluation), Trauma and PTSD, Traumatic Brain Injury (TBI)