On Friday, November 21, 2014 4:31:09 PM UTC-5, AMuzi wrote:
On 11/21/2014 1:48 PM, Lou Holtman wrote:
sms wrote:
On 11/18/2014 8:40 PM, jbeattie wrote:
I just broke my probably 8th crank, but who's counting. I was out of
the saddle, sprinting full blast up a 100 yard 5% grade in light traffic
getting over to a left turn shelter/lane. In fact, I had taken the lane
way earlier than usual because I had such a good head of steam up.
Snapped the right arm which caused me to veer left toward on-coming
traffic. I thought I was going down and then recovered and wobbled to
the right curb -- waiting to get smacked by the car behind me. Tweaked
my back, but it's a wreck anyway.

This was a classic Jobst break right across the pedal eye. The first
one of those I've had in two decades. Ultegra 9sp 2-piece Hollowtech.
The crank had seen a lot of use over maybe 7 years. I'm not sure of its
age. I swapped it off another bike and put it on my Cannondale CX when I
got tired of buying ISIS BBs for the OEM TruVativ crank on that bike. It
was scuffed, but not around the pedal eye. My first broken 2-piece. I'm so proud!

The bummer is that I left my pedal on the dark pavement. I'm going to
look for it tomorrow on the way to work. It didn't stick to my foot as
usual. Luckily, I was only a half-mile or so from home and could ride home one-legged.

I snagged the Ultegra crank off my super swanky CAAD 9 rain bike so I
can ride to work tomorrow. I'll get a new compact for the rain bike. The
other bummer is that when I took the crank out of my CAAD 9, the right
BB30 bearing is already shot (I use press in bearings with the Wheels
Mfg Shimano adapters). I dread knocking that out because I used a tough
adhesive when I put it in.

You need to immediately move to steel Cinelli, or other brand, of
cottered crank with whatever compatible bottom bracket and spindle you can find.

Just do an eBay search for "steel cottered crank."

Buy this tool while you're at it:
http://www.ebay.com/itm/CYCLO-VINTAGE-COTTERED-STEEL-CRANK-ARM-STRAIGHTENER-TOOL-CHATER-LEA-STRONGLIGHT-/281093714722.

Steel? I would try CF. If Jay stays with aluminum he should replace them
every 5 years, he can't be lucky forever. It is remarkable that he broke so
many cranks. I never broke a single one.


I haven't broken a crank either. At least one of my bikes is
highly unlikely to fail in that way:

http://www.yellowjersey.org/photosfr...st/MAGISTR.JPG


--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971

Early McCormick ?