Originally Posted by
3Roch
As mentioned above if you are only wanting 4 mm take a look at the hub. A lot of times there is a huge spacer on the non drive side that can be eliminated or replaced with something shorter. Then re dish (re center for those bothered by the "dish" term) and you're good to go.
My guess is that if a wheel has a large spacer like that it was really a 126 wheel to begin with. The whole point of the extra space was to allow more cogs on and if you take that away with a spacer you haven't gained anything. These are probably made for use on 130 frames during the transition period. As I posted above I have a Cannondale with 128 spacing that was made to accept either size hub as 2mm of give either way was acceptable, and these were transition frames. I didn't get whether the OP already has a wheel set he wanted to use or was just looking to buy.
And 11 speed is actually a 131 hub. It's a silly millimeter longer. (Do you remember those ads? or am I showing my age? or both?)