Originally Posted by
Rolla
OTOH, you might have found that slanted, front-facing dropouts create more problems for brake pad alignment, since the axle (and rim height) rises or falls in correspondence with the slant, in addition to shifting fore or aft.
I believe the semi-horizontal dropouts are more nearly perpendicular to the seat stays than true horizontal dropouts and will thus create less change in rim brake pad alignment at the braking location as the axle location is changed.
Otto