Amazing resource! “There are 14716 geometries in the database. That's 3447 bikes, from 421 brands.” - from website.

You can select make/models and it spits out a side by side graph of nearly complete bike geometry. Highly recommend you check it out if you’re shopping around.
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For a gravel/adventure bike, I'd say that site would be combined best with 
when looking at bike frame/fit options.
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