The Gear Index

What's that thing called?

You saw it on someone else's bike and you have no word for it — the ring built into the back wheel, the box the kids sit in, the cover that hides the whole chain. Pick the family and find it by what you saw. Every entry says what the thing is, how to spot it, what it's actually for, and where it falls short. No prices, no picks, no products — those live in the guides.

Every part, by its proper name

Start where the thing lives on the bike — each family page groups its entries by what you'd have noticed first.

Once you have the name, the buying guides do the rest — what to look for, what to skip, and where a cheap one is fine. Browse all guides →