In Technical FAQ, Lennard Zinn elicits a detailed response from Friction Facts on the drag saved by reducing a rear hub to two bearings
Wheels rolling roughly? Follow these tips to overhaul your hubs
Cyclocross still draws most of its equipment from the road and therein lies the problem
Lennard takes questions on the safety of breathing carbon fiber dust and premature bottom bracket wear
Lennard attends the Park Tool Summit and returns with tips for garage mechanics.
Old-school rims at Paris-RoubaixDear Lennard,I noticed that all the teams for Paris-Roubaix used old-school tubular rims for the race. How come they don't use the fancy composite tall rims as they do during the rest of the season? Did it have to do with their stopping power in the dry, dusty conditions or the punishment of the cobbles?Peter Dear Peter,Both. Carbon rims, especially deep-section ones, are so much stiffer that they are likely to crack rather than flex and bend like an aluminum rim would. In a crash, jagged carbon edges are worse than bent aluminum. And of course,