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best competition time of 13.28 would win many events in 1981. Now times of 7 to 11 seconds are needed to beat a best time in a competition. My getting a 13.81 sec in competition:

Ton's Speedcubing

It is hard to recommend what kind is best suitable for speedcubing, I prefer the Rubik's DIY kist from Rubiks.com. But there are now many more good speedcube, in short the type you need depens also an your style of speedcubing. The Rubik's DIY is most suitable for a smooth style, with the cube tight adjusted. Where e.g cube4you.com Type F , is suitable for speedy finger tricks. Cubes used by top speedcubers

Rubiks.com DIY:

cube4you Type A II:

Hybrid Type B cubies, Rubik's DIY core

cube4you Type C:

cube4you Type F

Edison cube