 You don't need to be an 'investor' to invest in Singletrack: 6 days left: 95% of target - Find out more
Hi guys
Hope someone can shed some light on this problem I'm having.
I have a new slx 11x36 cassette, slx medium cageshadow derailleur (not the plus version) and a 38t superstar nw ring. New xt shifter and new kmc x10-93 chain. The crank was a shimano alivio triple and the single is mounted where the middle ring was.
This setup has done about 10 miles and is on my commuter.
I spent an hour yesterday indexing and checking everything but still have the following problem.
The top 4 gears on the sprocket when riding sound very rough, sounds very similar to when the chain is making contact with the front derailleur.
The other 6 gears are spot on. No noise and very smooth.
All gears change very smooth and crisp but the top 4 just a tiny bit worse than the other 6.
Pictures attached to see if anyone can guide to where the problem might be.
A bit more b-screw tension.
Sorry used the wrong picture codes to share.
[URL= http://img.photobucket.com/albums/v177/so1o1/Cars/20161010_181744_zpsnndebkwk.jp g" target="_blank">
http://img.photobucket.com/albums/v177/so1o1/Cars/20161010_181744_zpsnndebkwk.jp g"/> [/IMG][/URL]
[URL= http://img.photobucket.com/albums/v177/so1o1/Cars/20161010_181751_zpsyqkyftjj.jp g" target="_blank">
http://img.photobucket.com/albums/v177/so1o1/Cars/20161010_181751_zpsyqkyftjj.jp g"/> [/IMG][/URL]
[URL= http://img.photobucket.com/albums/v177/so1o1/Cars/20161010_181753_001_zpszn4w02sy.jp g" target="_blank">
http://img.photobucket.com/albums/v177/so1o1/Cars/20161010_181753_001_zpszn4w02sy.jp g"/> [/IMG][/URL]
[URL= http://img.photobucket.com/albums/v177/so1o1/Cars/20161010_181754_zpsmw2xxq4q.jp g" target="_blank">
http://img.photobucket.com/albums/v177/so1o1/Cars/20161010_181754_zpsmw2xxq4q.jp g"/> [/IMG][/URL]
[URL= http://img.photobucket.com/albums/v177/so1o1/Cars/20161010_181610_zps4pchnpem.jp g" target="_blank">
http://img.photobucket.com/albums/v177/so1o1/Cars/20161010_181610_zps4pchnpem.jp g"/> [/IMG][/URL]
[URL= http://img.photobucket.com/albums/v177/so1o1/Cars/20161010_181714_zpsxxebjebu.jp g" target="_blank">
http://img.photobucket.com/albums/v177/so1o1/Cars/20161010_181714_zpsxxebjebu.jp g"/> [/IMG][/URL]
[URL= http://img.photobucket.com/albums/v177/so1o1/Cars/20161010_181557_zpsmcqfmgs4.jp g" target="_blank">
http://img.photobucket.com/albums/v177/so1o1/Cars/20161010_181557_zpsmcqfmgs4.jp g"/> [/IMG][/URL]
[URL= http://img.photobucket.com/albums/v177/so1o1/Cars/20161010_181737_zpsgpiwgdcq.jp g" target="_blank">
http://img.photobucket.com/albums/v177/so1o1/Cars/20161010_181737_zpsgpiwgdcq.jp g"/> [/IMG][/URL]
[URL= http://img.photobucket.com/albums/v177/so1o1/Cars/20161010_181430_zps78yiu54w.jp g" target="_blank">
http://img.photobucket.com/albums/v177/so1o1/Cars/20161010_181430_zps78yiu54w.jp g"/> [/IMG][/URL]
[URL= http://img.photobucket.com/albums/v177/so1o1/Cars/20161010_181436_zpset1uodnw.jp g" target="_blank">
http://img.photobucket.com/albums/v177/so1o1/Cars/20161010_181436_zpset1uodnw.jp g"/> [/IMG][/URL]
[URL= http://img.photobucket.com/albums/v177/so1o1/Cars/20161010_181438_zps6bbcxnk3.jp g" target="_blank">
http://img.photobucket.com/albums/v177/so1o1/Cars/20161010_181438_zps6bbcxnk3.jp g"/> [/IMG][/URL]
[URL= http://img.photobucket.com/albums/v177/so1o1/Cars/20161010_181452_zpsyowuhve0.jp g" target="_blank">
http://img.photobucket.com/albums/v177/so1o1/Cars/20161010_181452_zpsyowuhve0.jp g"/> [/IMG][/URL]
[URL= http://img.photobucket.com/albums/v177/so1o1/Cars/20161010_181423_zpss9n1rsr0.jp g" target="_blank">
http://img.photobucket.com/albums/v177/so1o1/Cars/20161010_181423_zpss9n1rsr0.jp g"/> [/IMG][/URL]
Get a goat link
Chainline not perfect ?
Thanks for the replies guys. I will give the "b" tension screw a go first.
From research and reading. Chainline will always be off at the very highest gear. I did measure chainline it's any 50mm. Very smooth and quiet on smaller 6 sprockets.
Chain a bit short?
I did the big ring to big ring plus 3 links instead of 2.
Shouldn't need a goatlink on an 11-36 cassette.
Sounds like b knuckle tension, hard to tell from photos. Make sure there's enough clearance between upper jockey wheel and cassette, If thats ok check hanger alignment.
Checked the clearence on the jockey wheel and it looks andown feels ok. The noise is a little better but still there in the uppermost three sprockets.
Thanks for the help guys
Excellent brickwork, disappointing finish to the concrete floor.
Rear mech hanger straight?
I had this recently with a 42t expander and Radr cage, really noisy in the 2 lowest gears. It turned out to be one of the bearings in my Hope hub!
Ah sorry didn't realise 11-36 cassette.
Qr wrong way round surely? Not that that's the cause of the issue.
Lol. garage floor needs a repaint.
I will have a look at the hanger. The hanger was new not long ago. Maybe three. Months. Bikes ever only used on the road. No crashes or knocks. Don't think it's ever been dropped on the hanger side. Old kit was working fine.
Anyone know if it makes a difference. Old derailleur was a sram x4. Would the hangers be different or the same for the slx medium cage shadow I have now?
Cheers
Had this a couple of times myself,I suspect it is a combination of chain length and chain line. Try adding a link or two to the chain and see if that cures it. On my 1x10 and 1 x 11 the mech isn't as far across as it is in your pics and they are both 42 sprockets.Many run it like that but I dont.As long as the mech isn't rubbing in the lowest gear you will be fine extending the chain.I did have an issue where I couldnt extend the chain anymore without it causing problems in the highest gear so I took out a bottom bracket spacer and that cured it.
Thanks for the suggestions.
Im pretty sure its a chainline issue.
The following pictures show the chainline (not the best photos) in the lowest gear and around the middle. You will notice the weird angle of the chain near the sprocket in the lowest gear.
Middle
[URL= http://img.photobucket.com/albums/v177/so1o1/Mobile%20Uploads/20161013_073413_zpstj4mbwi9.jp g" target="_blank">
http://img.photobucket.com/albums/v177/so1o1/Mobile%20Uploads/20161013_073413_zpstj4mbwi9.jp g"/> [/IMG][/URL]
Lowest gear
[URL= http://img.photobucket.com/albums/v177/so1o1/Mobile%20Uploads/20161013_073451_zpsqoe4r0kw.jp g" target="_blank">
http://img.photobucket.com/albums/v177/so1o1/Mobile%20Uploads/20161013_073451_zpsqoe4r0kw.jp g"/> [/IMG][/URL]
[URL= http://img.photobucket.com/albums/v177/so1o1/Mobile%20Uploads/20161012_220034_zpstsaxsb7l.jp g" target="_blank">
http://img.photobucket.com/albums/v177/so1o1/Mobile%20Uploads/20161012_220034_zpstsaxsb7l.jp g"/> [/IMG][/URL]
How do i remedy this?
The chainring is a 38, bikes used only for commuting.
I have literally a 2-3mm gap between the chainring and frame. See picture.
[URL= http://img.photobucket.com/albums/v177/so1o1/Mobile%20Uploads/20161012_222240_zps3g0yhiuu.jp g" target="_blank">
http://img.photobucket.com/albums/v177/so1o1/Mobile%20Uploads/20161012_222240_zps3g0yhiuu.jp g"/> [/IMG][/URL]
I cant push the chainring in using spacers because of the above.
What solutions can you guys suggest? Go double or use a smaller chain ring?
Or have i missed something and the above can be rectified?
Bottom bracket is an octalink and has no spacers
Tweaked the indexing and it's a little better but could use some advice on the above.
Thanks
Morning