Chain jammed inside front chainring and downtube ...

User avatar
Rural Rider
Posts: 209
Joined: Sat Sep 27, 2014 12:41 am
Location: NSW

Chain jammed inside front chainring and downtube ...

Postby Rural Rider » Mon Jan 01, 2018 11:09 pm

Cheers all.

Got back from a ride today and noticed when putting the bike away that the chain has jumped off the small cog of the front chainring and is good and jammed against the downtube. I don't want to do damage to the Carbon frame or paint if I can help it (2017 Trek Emonda SL6) ... it won't budge with my fingers. The chain is sitting midway on the rear cassette - I'd appreciate some good advice on getting it clear and re-seated.

I'm assumung I'll just need to remove/adjust the chainring and crank arms yes?

Thanks gents! 8)
2017 Trek Emonda SL6
2016 Specialized Allez e5 Sport

jackthelad
Posts: 339
Joined: Sat Nov 15, 2008 12:24 pm
Location: Perth, Western Australia

Re: Chain jammed inside front chainring and downtube ...

Postby jackthelad » Tue Jan 02, 2018 1:12 am

Sram is one 8 mm allen key easy job ,
undo retighten once chain is loose
shimano, do you have the tension cap tool?
undo the bolts , release the black wafer thing in the cranks, release the tension in cap,
reverse to retighten , me i just do one good yank, it be free
look at your shifting when you have it out
SantaCruz HighTower LT
SantaCruz Blur XC Carbon
Kona Kula Supreme(Retired/Spare)
Surly Karate Monkey
Ribble Rd Bike

User avatar
trailgumby
Posts: 13217
Joined: Sat Jan 03, 2009 5:30 pm
Location: Northern Beaches, Sydney
Contact:

Re: Chain jammed inside front chainring and downtube ...

Postby trailgumby » Tue Jan 02, 2018 12:59 pm

I'd recommend a K-Edge chain keeper. Bolts on over the top of your FD using a longer bolt. Due to my hybrid 10/11spd front setup, I used to drop the chain once every 2-3 rides. Not anymore.

https://www.google.com.au/search?rlz=1C ... 8bEBS4s6P0

jackthelad
Posts: 339
Joined: Sat Nov 15, 2008 12:24 pm
Location: Perth, Western Australia

Re: Chain jammed inside front chainring and downtube ...

Postby jackthelad » Tue Jan 02, 2018 1:59 pm

Go Single ring.... or chain keeper, whichever works best for u
SantaCruz HighTower LT
SantaCruz Blur XC Carbon
Kona Kula Supreme(Retired/Spare)
Surly Karate Monkey
Ribble Rd Bike

headasunder
Posts: 46
Joined: Tue Nov 17, 2015 8:44 pm

Re: Chain jammed inside front chainring and downtube ...

Postby headasunder » Tue Jan 02, 2018 6:14 pm

+1 to the chain keeper it removes fear factor, very ocassionly when I down shift up front there is a clatter as the keeper does it job certainly beats the alternative

Kronos
Posts: 398
Joined: Mon Oct 16, 2017 6:36 pm

Re: Chain jammed inside front chainring and downtube ...

Postby Kronos » Wed Jan 03, 2018 9:40 pm

A back pedal should usually unjam something like this.

Baalzamon
Posts: 5409
Joined: Mon Mar 12, 2007 2:23 pm
Location: Yangebup

Re: Chain jammed inside front chainring and downtube ...

Postby Baalzamon » Wed Jan 03, 2018 11:35 pm

BV great ride, had this happen very very badly to a rider and had to take the cranks off to fix it. Paint was damaged and a bit of a gouge on the carbon.
Masi Speciale CX 2008 - Brooks B17 special saddle, Garmin Edge 810
Image

User avatar
Rural Rider
Posts: 209
Joined: Sat Sep 27, 2014 12:41 am
Location: NSW

Re: Chain jammed inside front chainring and downtube ...

Postby Rural Rider » Thu Jan 04, 2018 12:45 am

Thanks for the tips gents!

I haven't the tools to fix this at home myself right now so will take it to the local Mech to get sorted and will definitely be installing a chain catcher as recommended! I can see there is already a little paint removed where the chain is jammed but hopefully no gouging to the Carbon Frame ... I don't want this happening again - and while usually OCD about damage or blemishes on Bikes, it's down where you can;t see a thing. Local Bike dealer is the Dealer I bought from so perhaps they have a little touch up paint on hand as well.

Cheers RR.
2017 Trek Emonda SL6
2016 Specialized Allez e5 Sport

RobertL
Posts: 730
Joined: Wed Feb 17, 2016 3:08 pm
Location: Brisbane

Re: Chain jammed inside front chainring and downtube ...

Postby RobertL » Thu Jan 04, 2018 10:28 am

If you can't find the right touch up paint, try nail polish. It comes in a million different colours and is great for touching up those sort of chips.
Image

User avatar
Rural Rider
Posts: 209
Joined: Sat Sep 27, 2014 12:41 am
Location: NSW

Re: Chain jammed inside front chainring and downtube ...

Postby Rural Rider » Fri Jan 05, 2018 12:38 am

Good tip on the fingernail polish ... tough for me though I'm not sure it will be easy to find such an odd shade of flat metalic grey/black DNISTER BLACK for my Trek. Worst come to worst I could get a mix from a spray shop to a price.
2017 Trek Emonda SL6
2016 Specialized Allez e5 Sport

jackthelad
Posts: 339
Joined: Sat Nov 15, 2008 12:24 pm
Location: Perth, Western Australia

Re: Chain jammed inside front chainring and downtube ...

Postby jackthelad » Sun Jan 07, 2018 3:46 pm

Just use clear nail polish, its just to seal the frame, not get fancy
SantaCruz HighTower LT
SantaCruz Blur XC Carbon
Kona Kula Supreme(Retired/Spare)
Surly Karate Monkey
Ribble Rd Bike

Who is online

Users browsing this forum: No registered users