Does this look weird to you? (rear derailleur)

deksawyer

E*POWAH Master
Jan 11, 2020
387
451
Fife, Scotland
New cassette, 11-46 (from 11-42)
New derailleur (same as before)
New chain.

The chain started with 120 links. I removed 4 complete links but chain was still a bit droopy on smallest cog. Removed 2 more and this is where we're at. Chain tension seem fine but derailleur looks really folded up and there's minimal clearance between top and bottom chain line.

Is chain still too long?

Original 11-42 setup had 114 links.

Cheers

Deek.
IMG20210224150740.jpg
IMG20210224150721.jpg


IMG20210224152303.jpg
 
Last edited:

Cb750stu

Well-known member
Subscriber
Nov 6, 2020
504
471
United Kingdom
New cassette, 11-46 (from 11-42)
New derailleur (same as before)
New chain.

The chain started with 120 links. I removed 4 complete links but chain was still a bit droopy on smallest cog. Removed 2 more and this is where we're at. Chain tension seem fine but derailleur looks really folded up and there's minimal clearance between top and bottom chain line.

Is chain still too long?

Original 11-42 setup had 114 links.

Cheers

Deek. View attachment 53986 View attachment 53987

View attachment 53988
Personally I'd remove one more link , looks close but that's just my opinion ?
 

steve_sordy

Wedding Crasher
Nov 5, 2018
8,936
9,279
Lincolnshire, UK
I like to see the mech arm pointing forward at 45 degrees when in the biggest gear at the back. Before riding, fully compress the suspension to check that the chain is still long enough, or bad things may happen.
 

Clubby

Active member
Oct 3, 2020
159
132
Tayside
SRAM 11 speed designed around 42T max. Have seen it used with a 46t cassette but won’t be perfect. Could probably do with losing another link, but deflate shock first and cycle the suspension through its travel.
Guy I knew who raced DH was always snapping mech hangers. Turns out he was running chain too short and when he hit a drop in wrong gear, the mech hanger was weakest link in system.
 

Penttithefinn

Member
Feb 3, 2021
79
87
Suffolk
I would suggest making a hook from wire to take up some slack in the chain to get an idea if the suspension will cause problems. If when bottoming out suspension at standstill, the chain is too tight the wire will then release the link. Having said that I thought the suspension design was such that it shouldn't make much difference in extension or compression.
 

Gary

Old Tartan Bollocks
Author
Subscriber
Mar 29, 2018
10,496
10,702
the internet
Remove the air from your shock and compress the rear suspension until max chain growth point and then shorten your chain as short as it can in the largest sprocket.
As you have it now you have fuck all tension in the chain on your highest gear so fast descending will create a load of chainslap.
 

Sander23

Active member
Aug 28, 2020
740
457
Belgium
As this is a chain topic i might just post it here.
I changed my front sprocket fro 20t to 18t do i need to shorten the chain or is it ok?
 

Sander23

Active member
Aug 28, 2020
740
457
Belgium
Well, watch this....although it didn't seem to work too well on a bike with the smaller bosch chainring hence my question in the 1st place.

I'd fit it and see.

Yea i do have a smaller bosch front chainring.
Sram
SmartSelect_20210301-194124_OneDrive.jpg

parktool
SmartSelect_20210301-194856_Opera.jpg

Those dont look the same or do i see that wrong?
 

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