Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  

Go Back   > >

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

User Tag List

Thread Tools Search this Thread
Old 03-26-11, 07:16 PM   #1
Thread Starter
Join Date: Mar 2011
Location: Houston, TX
Bikes: Trek 1.2 triple
Posts: 197
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Cross chaining and chain angle

I use a triple and I was wondering if I should avoid using the highest and lowest cogs while I'm in the middle chainring? If I'm in the largest or lowest chainring, I know I should stay with the highest and lowest cogs, respectively, to keep the chain more or less straight.

But is chain angle that much of an issue as long as I'm in the middle chainring?
wkndwarrior is offline   Reply With Quote
Old 03-26-11, 07:50 PM   #2
Senior Member
Join Date: Feb 2009
Posts: 4,930
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 36 Post(s)
As long as the chain is not rubbing the front der. it's ok.
davidad is offline   Reply With Quote
Old 03-26-11, 08:08 PM   #3
Senior Member
Join Date: Apr 2009
Location: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Posts: 30,352
Mentioned: 11 Post(s)
Tagged: 0 Thread(s)
Quoted: 601 Post(s)
Two considerations.

the first is that the chain clears the FD cage if it can't be trimmed, because you don't want to saw it through. Also that it clears the outer chainring coming from the outermost rear sprocket. That takes care of the minimum practicalities. Now the cross chaining issue.

While many people talk about cross chaining in a digital sense as in non-crossed combinations are OK and crossed aren't, thatosn't how chains see it. Chains run best when they're aligned, and wear faster and are less efficient when they aren't, with the degree of the problem related to the amount of deflection. It's a spectrum, with minor angles being minor problems, and more being worse.

So coming to your question, the inner and outer sprockets are the worst to use with the middle ring, but 2nd ones on either side are only slightly better, and so on until you get the middle and middle. So try to ride with the more aligned groups, but if it's the right gear for the moment using the outermost with the middle from time to time won't be a disaster.
Chain-L site

An ounce of diagnosis is worth a pound of cure.

“Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin

“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FBinNY is online now   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

All times are GMT -6. The time now is 06:56 PM.