What tires are those?
I got older 3 ply DFH, their still rubbing down the knobs and havnt put it on the rear cause I think it'll rub the frame, but damn does just one in the front grip good evne in loose gravel.
How are those grip wise on loose surface? They look like they might bite good, but roll smooth.
They look like the Holy Rollers to meThey work better on asphalt than they do on gravel.