Chainstay mounted U-brakes were a fashion for about 10 minutes in 1988. Only benefit is that chainstays are more beefy, so you get slightly less flex when hauling on the anchors.
Apart from being showered in SFAB on every ride, the other massive disadvantage is that with semi-horizontal dropouts as on most bikes of the era it was super-easy to misalign the wheel and have the brake blocks rip through your sidewalls within minutes.
Chainstay mounted U-brakes were a fashion for about 10 minutes in 1988. Only benefit is that chainstays are more beefy, so you get slightly less flex when hauling on the anchors.
Apart from being showered in SFAB on every ride, the other massive disadvantage is that with semi-horizontal dropouts as on most bikes of the era it was super-easy to misalign the wheel and have the brake blocks rip through your sidewalls within minutes.