There is a wide range of bike fitting services available, and where you go may depend on the level of service and expertise you need.
Many, but not all bike shops offer some level of bike fitting service. Mostly this is a basic service, but some bike shops have a strong focus on offering a high level pre or post purchase fit service.
There are also independent bike fitting studios which are specialty small businesses focused mostly or solely on bike fitting. Expect a higher level of expertise, technology and problem-solving products.
Bike fitting is also a service offered by some cycling coaches, physical therapists and sports medicine doctors. Clinical fitters like physical therapists will have a stronger emphasis on assessing your movement quality, but may be more limited in adjusting or changing out bike parts.
If you are looking for a fitter who uses a particular technology, or stocks a certain product, or has a specific credential, there will usually be a list of of fitters that brand’s website. The most popular way to find a bike fitter is to search online, or ask around in your local cycling community.
If you are looking for a fitter with a broad experience base and high skill level, search the database at the International Bike Fitting Institute.