Originally Posted by

**FBinNY**
Guy's it's 1 @#$%& millimeter, so it isn't going to make more of a difference than that. In reality it'll be less than that because the 289mm calculation was rounded in the first place. That's why I sent the OP back to where he got the calculation. If, for example the calculated measure was 289.3 than rounding up would be closer to the ideal, if it was 288.6 than rounding down would be closer.

In any case, anyone with a decent amount of wheel building experience is used rounding to the nearest even length, and doing so presents no unusual problems. Going to the extra work of buying longer spokes and cutting them is totally uncalled for.