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

New: Take part in the May Giveaway for C3STROM DELUXE electric bike valued at $3099 ⚡


More gear slipping problems
#1
Hi
I recently changed both back cassette and the chain on my mountain bike. Since doing this I have been plagued by gear slippage problems whenever I apply a lot of pressure (e.g. steep hills) - in fact the gears slip quite violently when I do this. I have followed all of the instructions found on these pages and others but the problem remains.
To summarize:
- the cassette and chain were bought at the same time in the same shop so I am sure they are compatible.<br />
- I have tweaked the cable tension to perfection (I swear the alignment is perfect on all cogs) but it still slips. I have even tried different tensions on the same back cog to see if it makes a difference - and it doesn't.<br />
- I have set the rear derailer so it is sitting in the preferred position in relation to the cassette<br />
- I have checked for stiff links and cannot find any
I have come across some posting that suggest that wear on the chainring could cause this? Is that correct? But to be honest the wear does not look too bad.
This did get me looking at the chainring and I noticed a red sticker on the chainring which reads thus:
"Shimano IG chain only"
The new chain I bought is a SRAM PC-951 - "compatible with 9 speed systems'
Any comment?
Thanks
PS I live and ride in West Africa, so popping down to my local bike shop to get it sorted is not an option! You guys are my local bike shop techies!

  Reply
#2
If this began suddenly after changing the cassette and chain, it would seem like it would have to be your front chainrings. Does it only happen in the small chainring in front or on both equally. A chainring has to be pretty worn for this to happen and usually the small one is more worn since people generally spend more time in it.
It's possible the 9 speed chain is designed for narrower chainrings than what you've got. But if the chain looks to drop down into the teeth fully, I don't know that that would be it.
Other possibility is that it is the ratchet in the cassette body slipping. But it would be a pretty bizarre coincidence to have that happen right after you change the chain.
If you can get this to happen at fairly slow speeds (up a steep hill?) see if you can get someone to run next to you and watch. Sometimes they'll be able to see where it's slipping much better than the person on the bike.

  Reply
#3
Thanks for this - this proved to be the case although it is a problem with the middle chain ring not the smallest one. I am now going to change all three chain rings and will endeavour to spread my work out across them in the future!
Cheers

  Reply
#4
Glad you found the problem. Check your chain for wear and replace it more often and you should avoid wearing out the chainrings in the future. They wear much quicker on an old chain because the teeth wear to match the "stretched" old chain.

  Reply


Possibly Related Threads...
Thread
Author
Replies
Views
Last Post
 
3,868
12-01-2020, 02:10 AM
Last Post: Jesper
 
10,697
07-29-2016, 03:42 PM
Last Post: GeorgeET
 
29,747
10-21-2015, 06:21 PM
Last Post: adolforst
 
8,960
06-17-2013, 05:25 AM
Last Post: capner2112
 
13,448
04-13-2013, 11:35 AM
Last Post: Painkiller
 
6,595
09-25-2012, 03:19 PM
Last Post: Bill

Forum Jump:

[-]
10 Latest Posts
Identifying Izalco Carbon with SRAM Red
Today 07:01 PM
If you come across bikes for sale at bar...
Today 06:11 AM
Less Popular Brands with Good New Bikes?
Today 03:35 AM
Hello
Yesterday 08:04 PM
Trek Marlin 5 Gen 2 vs Cannondale trail ...
Yesterday 07:14 PM
Help identifying a this beach cruiser pl...
Yesterday 07:11 PM
How much do you bike per year?
Yesterday 11:01 AM
Half Ironman Tips (for beginners and exp...
06-01-2023 09:26 AM
Avoiding punctures on road bike
05-31-2023 09:51 PM
Cleaning schedule and products
05-31-2023 09:46 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. ichitan
26 posts
no avatar 2. ReapThaWhirlwind
16 posts
no avatar 3. meamoantonio
13 posts
no avatar 4. SPINMAN
12 posts
no avatar 5. GirishH
12 posts