BikeSize is free to use. Some outbound links help pay for the hosting, research time, and data cleanup behind the site.
BikeSize is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.
We are also affiliates of Competitive Cyclist, Backcountry, Jenson USA, and REI. When you click on links to these retailers from our website and make a purchase, we may receive a small commission at no additional cost to you.
This affiliate income helps us maintain and improve our free bike sizing calculators and guides. We only recommend products and retailers that we believe provide genuine value to our users.
FTC Compliance:In accordance with the FTC's guidelines concerning the use of endorsements and testimonials in advertising, please be aware that the reviews and recommendations on this site may include affiliate links. We are committed to providing honest and transparent recommendations.
Service pages may also link to providers such as bike shipping companies. If an affiliate link is approved, we mark it with rel="sponsored". If no affiliate link is available, we use a direct provider link with rel="nofollow".
Affiliate status does not decide which calculators, size charts, articles, services, or providers we publish. When a page needs a caveat, we write the caveat.
For more on sourcing, corrections, and review windows, read the editorial policy.