I have to admit, that while I haven't ridden the correct size on all the bikes, the Trek 7.6FX in 17.5 rode like a dream....I didn't notice any issues with it. As for Sirrus, all they had was the basic in the right size and it rode ok, but not nearly as light or nice as the Trek...but again was basic. Haven't found a Fuji or a Jamis in the right size. Any ideas where to look in the DC area?