Have questions or want to discuss cycling? Join Now or Sign In to participate in the BikeRide community.

New: Take Part in the November Giveaway for a Chance to Win a Hybrid E-Bike Worth $1329


Chain Line Question
#1
How do i know the proper spacing for the bottom bracket to have the proper chain line for a mountain bike triple crank and nine speed cassette?

Thanks, i hope some one can give the learning on this one.
  Reply
#2
Hi Dos,
Try watching this and see if it helps....
http://bikeride.com/calculate-chain-length/

If this is not it come back and we can still help ya out.
Good maintenance to your Bike, can make it like the wheels are, true and smooth!
  Reply
#3
Sheldon Brown "chainline":-
http://www.sheldonbrown.com/gloss_ch.html#chainline

The chainset can be moved in or out a bit with limitations.
You need to check the front derailleur chainline "dimension".
(If Shimano, then see their appropriate tech' document.)
If the chainrings are to far out then the FD won't reach the outer ring.

If the bottom bracket is to short then the inner ring may catch the chainstay.

If buying a new chainset then there may be a recommended BB dimension with it.
Another possible problem, if the chainset is too near the frame, is the chain will catch the outer ring with the chain on the middle ring and smallest sprocket.
Ride hard or ride home alone!
  Reply
#4
Again I learn something new lol Smile . Thanks cycler. Think I better brush up on the terminology, very very interesting on the dimensions, cool.
Good maintenance to your Bike, can make it like the wheels are, true and smooth!
  Reply
#5
Very good cyclerUK you hit the nail right on the head. I could not have said it any better my self. Books are so much help at times. :-)
My dad always told me a Sledge a matic can fix any thing.
  Reply


Possibly Related Threads...
Thread
Author
Replies
Views
Last Post
 
7,618
01-09-2020, 11:31 PM
Last Post: Painkiller
 
7,329
10-21-2014, 08:10 AM
Last Post: cny-man
 
9,358
02-09-2014, 01:33 PM
Last Post: cny-man
 
11,160
04-29-2011, 01:45 PM
Last Post: DaveM
 
10,083
05-02-2010, 02:38 PM
Last Post: cyclerUK
 
12,965
03-17-2010, 09:34 PM
Last Post: Bill

Forum Jump:

[-]
10 Latest Posts
What was your favourite bicycle?
Today 11:04 AM
Traveling to texas
12-10-2024 10:06 PM
Remedies for contaminated disc rotors
12-10-2024 07:29 PM
Gears and derailleur misalignment
12-10-2024 05:15 PM
What was your first bicycle?
12-10-2024 01:41 AM
Andre leducq bike. Any idea on value
12-09-2024 11:51 PM
Pogačar's 2024 dominance
12-09-2024 07:48 PM
Beginner Mountain Biking Tips
12-09-2024 05:55 PM
How often check or change mechanical dis...
12-09-2024 12:44 AM
Looking for Recommendations: E-Trike for...
12-08-2024 10:50 PM

[-]
Join BikeRide on Strava
Feel free to join if you are on Strava: www.strava.com/clubs/bikeridecom

[-]
Top 5 Posters This Month
no avatar 1. Alexjohnson
35 posts
no avatar 2. GirishH
16 posts
no avatar 3. meamoantonio
11 posts
no avatar 4. Flowrider
10 posts
no avatar 5. ReapThaWhirlwind
9 posts