Single wall rims have 1 wall and form a U cross section. Double wall rims have 2 walls forming a box between the tube and spokes. A triple wall has, surprise, 3 walls!
See the difference in double and triple wall at the link below.
Strength (ex. rope) and rigidity (ex. glass) are not the same thing. You need a balance between the 2 to get a useful rim.
Box sections allow more more rigid rim designs all things being equal. Rims with wall thickness that's too thin can be very wobbly despite the number of walls. Balance is important.
Sun and Weinmann rims are quality rims, but a number of wheel builders I respect prefer Mavic. Mavic is more expensive because of good designs and quality control.
Materials course in college
· 10 years ago