if your talking about the edls i have them on just the front and they work great but my buddy lou on here had them all the way around and i think that his bike ran just fine
I personally love it and wouldnt have it any other way............. You should go with the edls on the front i think you will be suprised how much more your bike will pull with them upfronthey dirty how does your bike ride with 28 on front and 27 on back?
i put 5 lbs in the front of mine and 3 in back to get that effect.
i have 27's on all corners.