nathanh

Hi,
I'm having problems tuning the derailleur on a 2015 scott spark that I just bought used. It has an SRAM XX1 11 speed drive train.
Seems like the indexing is off and cassette gear spacing should be greater.

When shifting from smallest cog to largest through the range hits each gear but:
- from small cog to next larger is not quite
- from send largest cog to largest cog goes too easy

Then when shifting back from Largest cog to smallest cog
- first shift does nothing
- second shift moves from largest cog to second largest
- continues down but skips a gear at around the 5th gear

Below is a link to the video of shifting. Any thoughts?
Was thinking of changing the cassette? Any recommendations for a budget cassette that would match better?
I could also try changing the derailleur hanger - but it looks straight.

photos.app.goo.gl/F37BbrJbscRqwgxr6

photos.app.goo.gl/UJEYJVqM1Are1yFf8

soyabean

Cassettes only need to be changed if they are finished like shark teeth.

I get the impression you are asking this because you may not be able to DIY your own derailleur adjustments.

I suggest a visit to your LBS.

They will help you.

Iride01 

For those that don't want to make the links work .....

https://photos.google.com/share/AF1Q...ZyT1VaMFpiVEt3




When I've had gears get skipped or not shifting when the shifter is clicked, it was usually because of binding cables. Especially when it's in the middle ranges. One time it was the cables binding in the groove they'd sawed into the steel BB shell of my bike. One cable had almost cut completely through the wall of the shell.

Wouldn't hurt to pull the cables and change them if you know how. If not, then find the documents for that DR and shifter as well as look at videos for changing them out and then doing the necessary DR adjustment.

This is one place for decent info you can trust..... https://www.parktool.com/blog/repair-help

There are other good vids on youtube, but just because someone makes a good youtube video production and sounds good doesn't mean they really know what they are talking about.

If you don't feel up to the DIY, then take it to a bike shop and it probably will be less expensive than any DIY tuition you might have to pay for mistakes made.

nathanh

Perhaps but I have setup a few different derailleurs before and have had success and understand the basics. Would appreciate suggestions.

soyabean

Text from forum threads won't be as rich as videos on Youtube.

Not sure how to type my way to teach someone how to DIY a derailleur adjustment when a video can do much better.

Iride01 

Don't know which reply from what member or which comment you are perhaps'ing. <grin>

I already made a suggestion. Make certain the inner cable isn't binding for some reason or just change the cables and housings entirely.


I don't see any reason to think that changing the cassette will fix this unless it's just coincidence that something you did while changing it remedied the issue.

nathanh

Thanks. I have already ordered cable and housing but the cable seems to glide nicely when detached, so didn't think this was it. I will change this first to see. But the derailleur did seem sticky when manually opening/spreading wonder if that is the cause.

Iride01 

You are welcome and welcome to BF.

Sometimes we are sort of dry in our own humor and it gets misunderstood but we aren't trying to be mean. So read everything with a smile or at least don't impart any negative tone to our replies.

As a noob you passed the first test by figuring out how to just write the URL for the sharing link in the plain text of your message instead of using the linking tools or file management tools.

I think noobs also only get 5 posts per day and you are a noob till 10 posts. So use them wisely. Perhaps noobs can edit previous posts to add information when they reach their five post limit, but I don't know if any has tried that.

Iride01 

Clean it or just spray some light lube over it and see if you can make it work smoothly. I haven't had DR issues like that since my kids were pre-teen and were leaving their bikes caked with mud daily. But if the DR's parallelogram doesn't move smoothly through it's range, then that's very suspect.

nathanh

I came to the realization that the only things that could cause my indexing problem where "cassette gear spacing should be greater." are:
- incompatible parts
- bent drop out

Turns out a drop out alignment tool was less expensive than a dropout for my bike.

So I did the dropout alignment (BTW very easy and quick to do for anyone who has not done one before) - and yes it was bent.

Now the bike shifts perfectly!

So this thread can be marked solved / closed.