Ok...so your post' title is The Red Bike, but everything else is sharply focus...???
"Red Bike" actually. No "The".
If you mean to say that "everything else is in focus, but the bike" ..
I see why you say this, but I'm not certain that the focus is at fault. I'm shooting at f/8 and the bricks in the foreground are in focus enough the the bike should be as well.
I think the contrast and/or saturation of the bike - especially with the white tires and deep red frame - is blowing out some of the details and making it seem soft.
Thanks for picking up on that. I'll try some local adjustments to see if I can reduce the effect.
If you just have a problem with large depth of field, then I all I can say is that is how I shoot these days.
I see this frame as 4 quadrants - 2 white wheels, 2 white framed windows, green shrub, green tree.
Throwing the background into blur does not meet with my intent for the shot.
That not to say a shallow DOF would not have worked as well, it just isn't what I was going for.
Thanks for the comment!