[wolfereeno]

The cranks on my bianchi pista seem kind of warped. There's a slight wobble. What's a good set of light cranks to replace them with?

Thanks

 

[Chase15.5]

Sugino 75's, Dura-Ace (Track), Campy Record (Track) are all good cranks. The Sugino 75's are probably the least expensive of the three. Buy a Phil Wood Ti/Mag bottom bracket with any of these cranks and it should lighten it a bit...

 

[TurboTurtle]

Sugino 75's, Dura-Ace (Track), Campy Record (Track) are all good cranks. The Sugino 75's are probably the least expensive of the three. Buy a Phil Wood Ti/Mag bottom bracket with any of these cranks and it should lighten it a bit...

Those cranks and the Wood BB will cost more than the Pista did new. - TF

 

[PdxMark]

The cranks on my bianchi pista seem kind of warped. There's a slight wobble. What's a good set of light cranks to replace them with?

I don't understand how a wobble in a crank would be fixed by replacing the crank. Is the crank bent? If it were bent, it doesn't seem like it would wobble, it would just rotate in a different plane than the one that it should be in. I suppose the bottom bracket could be skewed to make the crank appear to wobble, but that would be a pretty dramatic event, I think. What are the other symptoms of the problem?

 

[BianchiJoe]

Think it over

Sugino makes a decent single-ring crankset, the RD, that can be had for $75 or $80 and a matching BB for $30. If you add a chainring you'll be in it for $150 total. And when you replace the chainring, you might as well get a new cog and chain; I always like to replace the drivetrain parts together so they wear at the same rate.

So is the chainring bent? Or is one of the crankarms loose? Fixing either of those problems is a lot cheaper.

 

[asterisk]

I would try to isolate the issue with the current crank... whether it be the crank, the chainring, or BB interface. As for a replacement crank, I'd check out the Miche or Stronglight track cranksets... the 75s/Dura Ace/Campy cranks are bling and might be overkill depending on how much you use your Pista.

 

[wolfereeno]

Thanks all.

The symptom is that when I turn the bike upside down and look closely at the chain, I can see it deviate a bit while pedaling. Maybe just by a mm or two. I've tried switching chainrings and checking that they're seated correctly and its still there. I guess it could be the BB or even the frame.

Anyway I just splurged on a used dura ace crank from ebay and a new BB. I'm planning a frame upgrade soon anyway. The wobble's not that bad. I may just leave it alone and save the new cranks for the new frame.

-Bill

 

[Suddha]

I put a Stronglight Track set on my Pista

UN72 Shimano BB and a Stronglight Track 165mm crankset with 48T ring. Miche 15T cog at the back and 1/8" chain.

Maybe this was overkill for my Pista but I just didn't like the Truvativ setup that came with it.