International cycling union's site is excellent, having news and links to sites for all aspects of cycling

Cycling on the Web
cycling news.com is a great site for keeping up with the world of racing across the globe...as well as an excellent archive, a tecnical section, pictures etc
UK time trialing news and a lively message board: Well worth a visit!
Riders' sites
Mountain bike sites
Road Racing sites
Track Racing sites

Training

Cyclo Cross sites

A super site with details on clubs, coaches, news, the GB team etc

BMX sites

Technical

General cycling

Excellent for everything cycling in the UK, from racing to transport news.

The transport charity which works to promote cycling... good for routes...

Cycling TV

 

for Vets
Velorider