chainwheel

David Gordon Wilson's "Bicycling Science" 3rd ed. lists three "expanding chainwheel" designs dating from the 1980's.

Making A Point: Paint, Sponges, and Determination BikeSnobNYC 2010

If all of the energy generated by stopping your bicycle dozens to hundreds of times daily is focused through the cranks, chainring, chainwheel screwpegs, chain, cog & lockring, 7 to 10 aluminum threads on the hub and spokes and tires, instead of being diffused through two rims and tires;still with me? then the weakest link is in those under-engineered thin threads on the hub.

You Must Be Crazy: Strength of Conviction BikeSnobNYC 2009

Recently had to schluff home; crunched a bottom bracket after a winter of riding through salty muck, whereby the utter lack of chainwheel alignment threw the chain w/ any more than 1/8 of a rotation.

Takin' It to the Streets: Things are Schluff All Over BikeSnobNYC 2009

The obvious solution is to substitute a smaller chainwheel up front, and smaller cogs in the back.

Contradictions: Contemplating the Mysteries of Cycling BikeSnobNYC 2008

Almost all completely brand new factory fresh, 14mm axles throughout, 3 pc tubular cranks, meaty chainwheel, dmr moto tyre on front, tioga factory on rear both never ridden.

Singletrack Magazine 2009

(Questions) - How do you take the crank (or the chainwheel) off a bike?

We Blog A Lot 2009