Trimax MAX40BK The MAX40BK is a short shackle motorcycle disc cable U-lock with black sleeve over chrome shackle. TRIMAX cable U-locks are simply the strongest short shackle locks you can buy. The MAX60 is ideal when combined with a TRIMAX cable or chain for securing motorcycles, bicycles, spare tires, ATVs, marine, trailers and much, much more. Tough polymer outer skin absorbs hammer strikes and reduces marring and scratching. TRIMAX makes the world's toughest locks. Through value added engineering design, TRIMAX is committed to product innovation that holds up to the highest quality standards. TRIMAX provides maximum security for marine, trailer and tow, RV, performance truck, power sports and bicycle applications. Tested. Tough. TRIMAX..