Cranksets: DA vs Record/PW.

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11-07-12 | 05:38 AM

#26

Chesha Neko

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Quote:

Originally Posted by carleton

7700 has needle bearings.
7710 has sealed bearings.

I've owned both.

Here is the correct techdoc for BB7710: https://techdocs.shimano.com/media/techdocs/content/cycle/EV/bikecomponents/BB/EV-BB-7710-1786B_v1_m56577569830728740.pdf

Thanks for the link.

11-07-12 | 11:17 AM

#27

carleton

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From: Atlanta, GA

BB7710 has sealed bearings and the NJS stamp presumably because NJS races also happen in the rain.

11-07-12 | 07:17 PM

#28

Chesha Neko

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Quote:

Originally Posted by carleton

BB7710 has sealed bearings and the NJS stamp presumably because NJS races also happen in the rain.

Now I'm just waiting for the next paycheck to order a DA set. I've been curious about the Campy mystique forever, but DA looks better IMO, is lighter, and reading the track forums it is perceived as being stiffer (again, I weigh a ton). Thanks for the help everyone.

11-07-12 | 07:30 PM

#29

marqueemoon

or tarckeemoon, depending

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From: the pesto of cities

Bikes: Davidson Impulse, Merckx Titanium AX, Bruce Gordon Rock & Road, Cross Check custom build, On-One Il Pomino, Shawver Cycles cross, Zion 737, Mercian Vincitore, Brompton S1L, Charge Juicer

Holy lipstick on a pig.

11-07-12 | 07:51 PM

#30

Bat56

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From: St.Paul, MN

Quote:

Originally Posted by Bat56

I would not put either of those on a steamroller.

All City 612.

Quote:

Originally Posted by marqueemoon

Holy lipstick on a pig.

11-10-12 | 01:49 AM

#31

Chesha Neko

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Quote:

Originally Posted by marqueemoon

Holy lipstick on a pig.

That's MISS piggy to you.

11-15-12 | 07:28 PM

#32

Chesha Neko

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A beautiful thing.

11-16-12 | 11:12 AM

#33

McRussellPants

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If you think you need that stiff of a crank wait till you hop on a frame with a stiff rear triangle and bottom bracket.

11-16-12 | 11:23 AM

#34

EpicSchwinn

Just smang it.

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From: Bellingham

Bikes: Felt F1X, Kilo WT, Dawes Deadeye

Quote:

Originally Posted by McRussellPants

If you think you need that stiff of a crank wait till you hop on a frame with a stiff rear triangle and bottom bracket.

QFT

I think those cranks are really sweet but doesn't the "you're only as strong as your weakest link" rule apply here? Sure the cranks are awesome, but if you're not on a super stiff frame, is it going to do you any good?

11-16-12 | 02:21 PM

#35

lhbernhardt

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From: Vancouver, Canada

Bikes: Rodriguez Shiftless street fixie with S&S couplers, Kuwahara tandem, Trek carbon, Dolan track

It probably doesn't matter if you're not going to be racing on the track, but one nice thing to have on a track crank is knurled fixing bolt backing retainers (the nuts) that attach to the crank. Having never used a Shimano track crank, I can't say if they have this feature, but Campag track (as well as Sugino 75) have crank spider holes small enough that a knurled track nut will stay fixed in the spider. This lets you do FAST chainring changes because you don't need a backing retainer tool; you just unscrew the fixing bolts and the backing nuts just stay firmly in the spider. And if you use Campag fixing bolts, the allen key goes all the way thru them, so you can stack all 5 on a 5mm Campag "pregnant" wrench. If you can do this with Shimano track cranks (and I can't really imagine Shimano being so stupid that you couldn't), then you're back to square one.

The other consideration is ISO square taper vs Octalink. My preference would be for Shimano Octalink, as much as I like Campag cranks. It would really be nice if Shimano made a track crank that fit a Hollowtech bb!

Luis