As an example FSA compacts will be measured at the drops but since they have a bit of flare are 2cm less on the hoods. So a 42cm FSA will put your hands on the same position than, say, 40cm Nitto bars.
And then there's the issue of the accuracy of the reseller's copy online.
And then there's the issue of the accuracy of the reseller's copy online.
In the end I called good old helpful Hubjub on the phone before ordering, who confirmed that the C-2-C width for the Nitto M109AA's is measured at the drops. So I've ordered some 42cm from them.
As an example FSA compacts will be measured at the drops but since they have a bit of flare are 2cm less on the hoods. So a 42cm FSA will put your hands on the same position than, say, 40cm Nitto bars.
And then there's the issue of the accuracy of the reseller's copy online.