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Am I the only one made nervous by the new DA cranks? SPOILER(16 posts)

Am I the only one made nervous by the new DA cranks? SPOILERSprint-Nick
Jun 1, 2003 12:25 AM
Why is it that I can see the bolt that clamps down on the bottom bracket shearing or stripping threads? I'm sure there is a spline or something like that where the crank attaches to the BB but to me it just looks like they are creating a problem where there never was one before.

Only time will tell.

-Nick
Similar designs...Smiker
Jun 1, 2003 12:31 AM
It's a similar design to the old Bullseye and Profile BMX cranks, so it should be strong enough. Shimano also introduced this style of attachment for the MTB XTR cranks in 2003. I've heard only praise about the new systems simplicity and stiffness, so the new Dura-Ace crankset should be fine.

Smiker
Nice designNessism
Jun 1, 2003 6:56 AM
The new cranks look like a nice design to me. The spline arrangement should be plenty strong. That said, $400+ for a crank is pure craziness in my opinion. Who buys this stuff?

Ed
$400?gtx
Jun 1, 2003 11:46 AM
Ouch. Is the group price going way up?
Price upNessism
Jun 1, 2003 7:19 PM
The new XTR crank/bb costs $450 at Colorado Cyclist so I assume Dura Ace will be similar since the technology is. Not sure about the other parts but no doubt they will cost more than current.

Ed
re: Am I the only one made nervous by the new DA cranks? SPOILERbic
Jun 1, 2003 3:43 AM
how hard is it going to be to learn a new way to spin?
Sweet Wings did something similar a few years agourwhaturide
Jun 1, 2003 5:44 AM
A small manufacturer made some similar cranks with outboard bearings and a one piece crank and bb spindle. Does anyone know how well these worked?
Yeah, I've got a set--awesomeGator
Jun 1, 2003 11:50 PM
They are the lightest, stiffest, best-looking cranks you will ever see. They were a company with a great design and no business plan, unfortunately.

There are two problems with them, one minor, one major. If you don't take them apart and clean them from time to time, the sand and dirt that builds up on the center shaft will wear grooves in it and you'll get a few mm of play between the bearings and the shaft. They're super easy to take apart though, and the little bit of play is no big deal.

The big problem is that the shafts DO break and there are no replacements--if you're not a metal fabricator, your $550 cranks are toast. Mine are six years old and solid, so who knows, you roll the dice.

I'm pretty sure Shimano looked at these problems (they're obviously using what is pretty much the same design) and hopefully engineered some solutions. If not, expect regular maintenance, some play and a few failures.

I'd
Naaah.Gregory Taylor
Jun 1, 2003 7:58 AM
With a high-grade cap-screw clamping it together, and correct torque, there should be no problem. Most problems with high-zoot stuff like this comes from not following the manufacturer's spec's when assembling it.

That said, this design is a pretty clever work-around for the fundamental design limitation posed by the standard bottom bracket dimensions. I'd say get ready for a push to standardize a larger diameter bottom bracket in order to accomodate the larger bearings that are optimal for the splined pipe-style cranks.
Does this mean everyone will be adjusting Q angle now? nmEug
Jun 1, 2003 10:54 AM
Q-Factor will not change... it will stay same as current D-A -nmrussw19
Jun 1, 2003 7:27 PM
six months and no problemschazman
Jun 1, 2003 1:51 PM
I've been using the XTR mountain bike version (same design) and have not had a single problem. I'd worry more about the 10 speeds and extra plastic stuff in the shifters before I'd worry about these superior cranks.
So why is this a spoiler?Kerry
Jun 1, 2003 4:22 PM
Were we all waiting to watch a tech report on OLN and now you've wrecked it for us? I must be missing something.
why be an @$$?I Love Shimano
Jun 1, 2003 7:59 PM
..
Shimano just wants a reason to jack up the price of D.A.MR_GRUMPY
Jun 1, 2003 5:25 PM
So that it will be the same cost as Record. The only problem with that, is that Shimano won't have anything to run against Chorus next year. In 2005 they MAY upgrade Ultegra to equal Chorus, but that's only a maybe.
new in-phase crank arrangement, too? ;-) nmDougSloan
Jun 2, 2003 6:31 AM