[KIXASS]

Is there a noticeable difference when switching from 525 to 520 chain setup?

Aluminum rear sprocket worth the swap as well?

 

[MrKo]

For street.. no, for track yes.

 

[mr_honez]

For street use I'd stick with steel. The chain won't make any noticeable difference on the street either. If you can get a deal on a set and it needs to be changed then I'd switch to 520 but I'd stay with steel if you are not going to use it on the track.

 

[tdh]

I use steel both on the street and on the track (520).