Chainline causing noise?

EJ25

New Member
Region
Australia
G'day everyone, i just recently changed my front chainring on my bbshd from a 46t to a 42t, the difference between them offset wise is -10mm so the chain in 1st gear is on quite an angle and is making a sort of clicking noise, would this be the result of an extreme chainline?. If so what are the disadvantages to that. The reason I'm not 100% sure on this is because at the same time I replaced the rear cassette and chain and thought maybe they might be causing it. It's shift nicely without a problem and only makes the noise in 1st gear. Let me know what you guys think, cheers.

I have attached a picture for reference, the photo doesn't quite show it but it looks a bit worse in real life.
 

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theemartymac

Well-Known Member
Noise can equate to wear, but not necessarily to a point of concern unless you live in that gear a lot. Check this one out.

 

EJ25

New Member
Region
Australia
Noise can equate to wear, but not necessarily to a point of concern unless you live in that gear a lot. Check this one out.

I just watched that video about 5 minutes ago haha, I'm not in 1st very often only on steep hills so I guess I don't mind the slightly extra wear. I might try and space the chainring out a little because the noise is annoying and would prefer it not to be there, but if I have to live with it it's not much of a hassle. Cheers
 

indianajo

Well-Known Member
I would check the chain knobs are hitting the frame. If so a washer on the axle spreading the frame a little might help.
I usually wear out the 3rd or 4th sprocket, not the first. I only use my first sprocket in spring when I am out of shape. I wouldn't worry about it.
 

EJ25

New Member
Region
Australia
I would check the chain knobs are hitting the frame. If so a washer on the axle spreading the frame a little might help.
I usually wear out the 3rd or 4th sprocket, not the first. I only use my first sprocket in spring when I am out of shape. I wouldn't worry about it.
Yeah I don't think I'll worry about it the chain isnt hitting anything that I can see. I only use 1st for getting up steep hills and what not so i guess it's not that big of a deal. Still happy with the 42t over the 46t chainring though