n00b questions about chainrings

zzpza

hi,

i know next to nothing about bikes, so go easy on me, k? i may use the wrong names for things...

i have a gt aggressor 2.0 that i bought 2nd hand. i think most of the parts are original. i just noticed today that four of the teeth on the biggest chainring are extremely badly worn (two groups of two). are they supposed to be like that? they line up with the crank and are 180 degrees from each other so i'm wondering if this was done to make it easier to change gear?

here's a pic. you can see two of the worn teeth at the top, the other two are at the bottom and not visible:
http://www.julianl.co.uk/filedump/julianl_2007-0179.jpg
it says it's an "SR Suntour CR210 PFF" if that helps.

cheers!
jules.

secondtimeuser

They're what is technically known as "knackered."

New chainring would be good [:)]

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david28031982

theyre for shifting have just looked at a set in the shop and they have this feature

secondtimeuser

o.O

How odd.

Especially given that Shimano, RaceFace, Middleburn et al do no such thing?

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zzpza

ah cool. thanx for the quick reply. it did seem weird that they had worn so badly when none of the others had.

ride_whenever

Nonsense, all the manufacturers do, my brand new middleburn SSHC rings have i think four sets of three worn teeth the shortest of which is a half tooth and they all are different.

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nicklouse

<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by secondtimeuser</i>

o.O

How odd.

Especially given that Shimano, RaceFace, Middleburn et al do no such thing?

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<font color="black"><b>Blackspire</b></font id="black"> <font color="black"><b>Chris King</b></font id="black"> <font color="black"><b>Dark Cycles</b></font id="black"> <font color="black"><b>DTSwiss</b></font id="black"> <font color="black"><b>Easton</b></font id="black"> <font color="black"><b>Fox</b></font id="black"> <font color="black"><b>Gu</b></font id="black"><font color="black"><b>ss</b></font id="black"><font color="black"><b>et</b></font id="black"> <font color="black"><b>Ho</b></font id="black"><font color="black"><b>pe</b></font id="black"> <font color="black"><b>Identiti</b></font id="black"> <font color="black"><b>Marzocchi</b></font id="black"> <font color="black"><b>Mavic</b></font id="black"> <font color="black"><b>Nokian</b></font id="black"> <font color="orange"><b>Orange</b></font id="orange"> <font color="black"><b>Race</b></font id="black"><font color="black"><b>Face</b></font id="black"> <font color="black"><b>S</b></font id="black"><font color="black"><b>hi</b></font id="black"><font color="black"><b>ma</b></font id="black"><font color="black"><b>no</b></font id="black"> <font color="black"><b>Specialized</b></font id="black"> <font color="black"><b>S</b></font id="black"><font color="black"><b>r</b></font id="black"><font color="black"><b>a</b></font id="black"><font color="black"><b>m</b></font id="black"> <font color="black"><b>Thom</b></font id="black"><font color="black"><b>son</b></font id="black"> <font color="black"><b>Velox</b></font id="black"> </font id="size1"></u></center>
<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">need to look a bit more closely.

nick
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