杏吧原创

Spin Cycle

Why do track bicycles often have the rear wheel filled in with a solid disc, while the front wheel retains the standard spokes?

Brad Tyrer, Florence, Italy

Topics: Last Word

More from New 杏吧原创

Explore the latest news, articles and features

Popular articles

Trending New 杏吧原创 articles

We鈥檙e finally learning what happens to gifted children in adulthood

Alzheimer鈥檚, stroke, depression: The preventative power of sauna

Game that reduces dementia risk may clear amyloid from men’s brains

Neurostimulation restores feeling in paralysed hand for months after

Best treatment for multiple sclerosis may be antivirals

Four children with terminal brain cancer saved by new cell therapy

Can everyone live a 鈥榞ood life鈥� without destroying the planet?

Ancient Egyptian princesses buried with weapons may have been fighters

Can consciousness be quantum? We may now have an answer

Next-generation Alzheimer’s drug reduces risk of serious brain bleeds