Bike Finder
Four questions about the riding you actually do, not the riding you imagine. At the end you get the type of bike to shop for, which is the decision every other cycling purchase hangs off. No email required, nothing stored.
What this tool can and cannot do
This narrows the category, which is the hard part and the expensive one to get wrong. Read the full buying guide, then get the size right before you buy anything.
If you are weighing new against second hand, the budget guide covers what each price step buys and how to check a used bike.
Recommendations link to retailers through affiliate links. See the disclosure. This is general information, not advice: see the terms.