5 links
Biking Articles by Sheldon Brown and Others
sheldonbrown.com
This site contains a wealth of technical articles about bicycle maintenance for both mountain and road.
Chain-suck in a Nutshell
fagan.co.za
Jonanthan Levy details the causes and mechanisms of chain suck and how to avoid and prevent it.
Chainffect
hometown.aol.com
Discusses technical aspects of suspension systems on mountain bicycles, with technical illustrations.
Singlespeed Mountain Bikes
sheldonbrown.com
Many cyclists are rebelling against the excessive complication, fragility and weight of current mountain bikes. Discusses move to using simple, one-speed bicycles.
The cycle shed
thecycleshed.co.uk
Single speed, wheel building, t-shirt printing, yorkshire (UK) based stuff.