Chain rubbing seat stay

[silly_yak]

When I am in small rear (11t), large front (42t) my chain rubs my chain stay. Any ideas on how to correct this?

Also, My large ring is starting to lose teeth, and I use the bike for mostly trails. Do I:

1) Leave it
2) Replace with new ring
3) Replace with bashring

Gregg

[nocro]

When I am in small rear (11t), large front (42t) my chain rubs my chain stay. Any ideas on how to correct this?

Also, My large ring is starting to lose teeth, and I use the bike for mostly trails. Do I:

1) Leave it
2) Replace with new ring
3) Replace with bashring

Gregg


On the second question, depends on where you ride. But for most places around here, I suggest bashring. How often do you actually use your large chainring? That should be the deciding factor for you. If you're just going to be destroying teeth on the new chainring, use a bashguard instead.

I went to a bashguard on my XC bike about a year ago, and haven't looked back. Now, where I used to ride was much flatter, and it made sense for me to have the big ring. If you use this bike on the road, too, you might consider keeping the large ring.

[silly_yak]

On the second question, depends on where you ride. But for most places around here, I suggest bashring. How often do you actually use your large chainring? That should be the deciding factor for you. If you're just going to be destroying teeth on the new chainring, use a bashguard instead.

I went to a bashguard on my XC bike about a year ago, and haven't looked back. Now, where I used to ride was much flatter, and it made sense for me to have the big ring. If you use this bike on the road, too, you might consider keeping the large ring.

I can't say that I hardly ever use my large chainring. I rarely used it on my road bike. Other than downhill (my weak ass is coasting), is it really needed?

Gregg

[punga]

I can't say that I hardly ever use my large chainring. I rarely used it on my road bike. Other than downhill (my weak ass is coasting), is it really needed?

Gregg
I haven't had big ring in over 3 years and can't say I've really missed it. Even fireroads in GW don't seem to be a big issue. I've hit close to 40 before with only a 34/11 combo. You won't miss it here.

p!

[Brizn]

When I am in small rear (11t), large front (42t) my chain rubs my chain stay. Any ideas on how to correct this?Where do you ride this gear combo?! Does it rub in the stand only?- or on the trail, too? Is your chain the correct length?

[g_barr]

When I am in small rear (11t), large front (42t) my chain rubs my chain stay. Any ideas on how to correct this?

Also, My large ring is starting to lose teeth, and I use the bike for mostly trails. Do I:

1) Leave it
2) Replace with new ring
3) Replace with bashring
The chain is rubbing the seat stay right? It shouldn't be rubbing the chain stay at all. Slapping the chain stay (but not rubbing it) is very possible and is affected by chain length and derailleur 'tension'. To expand on Brizn's question - when does it rub?


Any time 42-11 is selected, no pressure on the pedals.
Every time 42-11 is selected but only with pressure on the pedals (i.e. chain is 'taught').
The only reason I can think a 42-11 combination would be rubbing the seat stay is if your chain rings are farther away from the bike's centerline than it should be. This could be caused by a longer crank spindle than originally spec'd, extra/unecessary/misplaced crankset spacers and/or (although less likely) more space between the chainrings than originally spec'd.

Regarding the leave, new ring or bash ring... I like my big ring and I use it. I would get a new one.

My arguement against leaving an old one (especially missing teeth) is like sharp vs. dull knives. A "dull" chainring could leave a much nastier wound than a "sharp" chainring in a crash. So if you bash the big ring a lot or don't use it often, I'd definitely replace it with a bash guard.

[Dr Phil mmkay]

I've only ever been in the big ring in front when I'm riding through Accotink's multiuse trail around the lake or on the street (did 21 miles from Mt. Vernon to Old Town Alex. once) but for single tracks and other local trails around northern VA, I would suggest you use a bash.

I've also cut myself pretty badly on the big ring before when I first got into mtbing, those scar are permanent too! :)

[silly_yak]

Ended up with a Giant ATX-890. The chainrings are what originally came on the bike, but the wheel/cassette is from another bike. I believe that the ATX-890 came with a 11T as well though and both are 7-speeds.

It is a light rub btw - I only see it on the stand, so there is not a lot of tension.