after 54 miles i could have done more; really. and it's the longest ride i've done all year. Mine was not "pre broken in"
it would be cool to get one like that though.
my husband is going to let me borrow his b17 (which is definitely broken in) for my new bike to see if i like it. mind you, it's because he doesn't want to take the b67 off the tandem because getting these things into adjustment is such a hassle.