Wobbly crankset?

[Polco]

I've picked up an old SR Silstar crank with some very nice condition SR chainrings, however I noticed when I spun the cranks on the donor bike that there is a wobble by a few mm in the ring. I can't see any impact damage either on the ring or the crank itself, the wobble seems to be at the same place on the inner ring too, so question is were these made with a very poor tolerance to straightness or has something gone horribly wrong? And any opinions whether it will be ok to run on a bike?

 

[pigman]

Re:

just 'tweak' it by levering with a screwdriver.
Note, don't overdo it, which is easy to do .. little by little

 

[Johnsqual]

Re:

Uesful notes by Sheldon Brown on straightening chainwheels:

http://sheldonbrown.com/straighten-chw.html

He also advocates Pigman's suggestion to use a screwdriver as a lever.

Johnny

 

[Polco]

Didn't think it was that common a problem! Thanks for your help.

 

[Midlife]

The more you pay the straighter they are................SR apex were always wobbly............Dura-Ace, Campg, Zeus, Ofmega, OMAS etc were generally straight

Shaun

 

[keithglos]

Re:

The first time I fitted chainwheels that needed no truing was in 1958 with the Campagnolo chainset. Couldn't believe it.

Keith

 

[Polco]

All sorted using the 'Sheldon method', turns out both the spider and the outer ring were wobbly!