Custom Carbon Geared Crankset Tips Scales Under 500g… with Bottom Bracket
They say the last couple of pounds are the hardest to lose, but Newbury Park Bike Shop (the ones that built up that 15.6lb Cannondale Flash) have come up with a way to drop about half a pound from your portly whip.
Custom fabricated for an upcoming project bike they’ve hinted at, these carbon chainrings and spider were machined from blocks of carbon fiber for a total crankset with bottom bracket claimed weight of just under 500g. We didn’t get any pics of them on the scale, but the standard Cannondale Hollowgram Si SL crankset system with BB30 bearings weighs in at just 580g, so it’s not a stretch. The crankarms are machined, hollow 2000-series aluminum mated to a thin-walled 30mm axle.
Make the jump for more delicious photos…
Looks like Craig’s going to really have to bring the lightweight to the party with the new eeCranks to top, er, undercut these.
Comments
Certain things are not meant to be made out of carbon fiber. Chain rings are one of them.
Yeah why stop at CF, why not CNC stuff from knotty pine, or even paper mache.
hey look its disposable chainrings. use once and throw them away.
To editor: love your site, but please refrain from using the word “whip”. Bike riding is not a hip-hop video.
LOL.
Didn’t realize there were so many CF engineers visiting this website.
The rings last 2000 miles if properly installed and maintained. They use them on Mountain bikes too.
Carbon chainrings definitely wouldn’t be for the average rider but maybe in a race situation they would be worth their lack of durability. Use once or twice and then replace. The big question would be just how well they would hold up in an event. Even Tour de France riders want reliable components if it means sacrificing a few grams.