Dérailleur catching rear wheel.

[a_nic_an]

Hi all;
I have recently replaced my first ever wheel. I removed the rear mech etc, attached it to the new wheel and slotted it back into the frame. However, now the spinning cog type bit that extends downward on a bendable arm, I believe it to be the dérailleur, is brushed against by the spokes of the wheel.
I've exhausted my eyes and patience staring at it to see if I can spot something ive done wrong.
Is there any obvious reason why this might be?
Thanks folks;
Nic

 

[biggs682]

if a like for like swap then shouldnt have made that much difference

what bike is it ?

 

[Mobytek]

Sounds like its not seated in the hanger properly. You have the frame, thena piece that links the frame to the deraileur. If it's not got the B Limit Screw seated then it will be out (google it - hard to explain) either that or you've fitted it at an angle...

Or PM me a photo ....

 

[Cycleops]

You removed the rear mech? Or do you mean the cassette? Sounds like something has gone back wrong. Try to post a pic.

 

[jack smith]

You dont need to remove the mech just adjust the limit screws so it cant move into the wheel look online for rear derIlliour videos

 

[steveindenmark]

I wouldnt touch the limit screws just yet. If it was seated correctly before you moved it should seat correctly again if you play with it again.

 

[screenman]

Find somebody who can do it for you.

 

[mrandmrspoves]

Could be as simple as axle washers being in the wrong place (they should be on the outside of the frame not inside) Check that, and re-seat the wheel and then check again. If the rear derailleur is still catching the spokes then it's time to adjust the Low limit screw by turning it clockwise about half a turn at a time until the derailleur clears the wheel.

 

[User6179]

Find somebody who can do it for you.

You can buy a tool for that , very good it is btw

 

[a_nic_an]

Thanks everyone, sorry it has taken so long to reply, I've injured my knee and been off cycling for a few months which has taken away my impetus for diy.
I did mean that I removed the cassette not the dérailleur, but the dérailleur now touches the spokes.
A local friend said that it could be that spokes on different wheels can be at different angles so that they may protrude further on the new wheels. Is that true?
I will have another look today.
Nic

 

[uclown2002]

I had similar experience recently changing wheels and my issue was with not using the correct spacers with the cassette.

 

[a_nic_an]

How did you discover that that was the issue? Does the wheel anufacturer advertise what spacers should be used with the wheel?
Thanks

 

[uclown2002]

How did you discover that that was the issue? Does the wheel anufacturer advertise what spacers should be used with the wheel?
Thanks

Figured as cassette wasn't right with or without the spacer taken from previous wheel, I needed a different spacer.
Research found me a useful table:- http://www.slowtwitch.com/Tech/Cassette_Spacers_2013_3978.html