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Young, Shawn Young
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Discussion Starter · #1 ·
I dont use my granny ring very often but on ocassion I might need to. That said here is my problem: As you can see in these horrible pictures, when I have the front in the granny and Im using either of the two smallest gears in the back the chain is rubbing on that guide. Its actually resting on it a bit so that it grinds against it when pedaling.

Should I move the whole piece by loosening the clamp for the whole mechanism and lowering it a 1/4 of an inch? Then I could take up the slack in the cable? I dont really know so any comments would be appreciated,

Shawn
 

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simple: don't use granny ring with smaller cogs

Redmon said:
I dont use my granny ring very often but on ocassion I might need to. That said here is my problem: As you can see in these horrible pictures, when I have the front in the granny and Im using either of the two smallest gears in the back the chain is rubbing on that guide. Its actually resting on it a bit so that it grinds against it when pedaling.

Should I move the whole piece by loosening the clamp for the whole mechanism and lowering it a 1/4 of an inch? Then I could take up the slack in the cable? I dont really know so any comments would be appreciated,

Shawn
inboard-most chainring + outboard-most cog(s) = bad chainline = increased wear on chain, rings and cogs.

The gearing range you get from using the granny ring with the smallest few cogs is also available by using the middle ring with the appropriate rear cogs.

Prove it yourself: Gear inches = #front teeth divided by #rear teeth. You'll see you don't need to use the granny ring with probably the smallest half of the rear cogset.

When in the granny ring and the smallest rear cogs the derailleur tension is minimized so the chain flops around more than in other gear combos.

Front derailleur cage should clear the big chainring teeth by like 2mm. If yours is higher, move it down to get best shifting.
 

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Young, Shawn Young
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3,165 Posts
Discussion Starter · #3 ·
That was a dumb question. For some reason I had my cogs mixed up in my head. Move along, nothing to see here....
 
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