I can't figure this out. When adjusting the tension of my chain, I first loosen the axle nuts, and then play with the tension bolts until I have the proper chain tension. Then I torque down the axle nuts to the proper spec. The chain is still at the proper tension. Now, when I tighten down the chain tension bolts, the chain tightens up! How is this possible when the axle bolts are tight and prevent the axle from moving? Even if I am over tightening the tension bolts, I don't see how the chain can tighten when the axle nuts are tight and prevent the wheel from moving back. Can anyone enlighten me? Thanks.