My friend is almost ready to order his new road frame. The manufacturer gives him the option of 1" or 1 1/8"? We have already established that his fork of choice is available in both sizes.
The manufacturer told him that it is merely an issue of cosmetics (the wider head tube is now en vogue; except with the more traditionally minded constructors).
I wonder what the bikeforum people think about this. Any strong opinions in favour of one or the other? Benefits? Downsides?