2009/12/30

Scalpel rebuild teaser



With less chainrings comes a narrower crankset. The modular Cannondale Hollowgram SL is the king of cranksets, it allowed me to put a shorter spindle, a spider that puts the Spot single speed ring just centered with the cassette to optimize everything. Easily under 600gr complete, including the bottom bracket. With short axles on the pedals too (noticable by the shoe rub on the arms), this crankset allows me not to feel like a cowboy as most mountain cranksets do with their super wide stance. Sorry for the dirty bike, parts install, Phil Wood's grease means smudges all over...

2 comments:

cerrol said...

Mounted on inner side with a shorter axle than normal. Isn't the chainring a little to much in than and not in the middle of the cassette? Is it too tight with the crankarms to mount the chainring on the outer side and use an even shorter axle?

Really nice and absolutely the best crankset.

Dan Gerous said...

Typical mtb cranksets are not aligned with the cassettes, they're slightly more out. I went from the standard 131mm spindle to a 128mm, that makes only 1.5mm each side. I wanted the ring on the inside to make sure the chainguide will be far enough from the crankarm.

I also changed the spider to have a better chainline, the spider used is more 'out' than the one I had with the 2x9 setup (which was a spider with more offset made for 73mm BB shells)... It's pretty much centered with the cassette now but my feet are a bit closer together.

The middle of a cassette on most mtb hubs are around 45mm off the center of the wheel. So a 45mm chainline on the front would make it perfectly centered... Of couse this can vary from one hub to another, one cassette to the next...