Burley Design Bicycle Trailer Hitch (Standard, Forged) Standard Forged Hitch compatible with both 9.5 and 10.5-millimeter axles Works with: quick release or nutted axel wheels; disc brakes; and full suspension bikes Does not fit Breezer-style dropouts Mono-stays require a longer safety strap (sold separately) Made of forged 6061 T6 aluminum