Epinions: Cycling Products

Consumer-generated reviews, buying tips and advice, ratings, price information, and searchable in a variety of ways from price to product type.
http://www.epinions.com/otdr-Cycling

Consumers' Checkbook: How to Buy Bicycles

Gives general considerations on how to select a product and which features are useful.
http://www.checkbook.org/bargains/prodtext/sgbic.htm

Best Bike Buys

Compare prices and selection on bicycle parts, clothing and accessories.
http://www.bestbikebuys.com/

eBuying Guides: Where to Buy Road Bikes

Concentrates on where to buy and shop for products, but also has staff-produced buying guides for over 200 products. Some of the guides are links to other buying guide sites. Accepts no payments for listings.
http://www.ebuyingguides.com/where/rbike_w.htm

Consumersearch.com: Mountain Bikes

Identifies which products reviewers like and dislike, where they agree or disagree, and why.
http://www.consumersearch.com/www/sports_and_leisure/mountain_bikes

Xoomgear

Offers consumer reviews and product comparison of mountain and road bikes by features and price.
http://xoomgear.com

BikeTech Review

Offering unbiased, laboratory-based evaluations of cycling products. Price, performance, and durability are used as the principle evaluation criteria.
http://www.biketechreview.com

eHow to Buy a Used Bike

How-to centers that give consumer information, shopping advice, as well as how to do things such as projects.
http://www.ehow.com/ehow/ehow.jsp?id=14157

How to Buy a Bike

Tips and advice on buying bikes from the National Bicycle Dealers Association.
http://nbda.com/site/page.cfm?PageID=63

Pedal Power

Bicycle buying guide, including a section on children's bikes, from an Australian cycling organization.
http://www.pedalpower.org.au/oldsite/about/buying.htm