A Shimano 11-speed rotor is only 1.85 millimeters wider than the previous counterpart for 10-speed cassettes. However, this difference in distance means that, conversely, an 11-speed cassette will not fit on an 8-/9-/10-speed rotor. The last, smallest sprocket simply cannot be fixed in place.

Edco has now fired up the milling machine and milled a problem-solving cassette from a steel block. In combination with a special end ring, this milling machine makes it possible to tease out 11-speed shifting performance on a 10-speed rotor.

The Edco cassette called Monoblock weighs around 163 grams with its 11 sprockets and is available for Shimano, Sram and Campagnole road bike drivetrains. In Switzerland, the distributor Platts has been selling the Edco range for around a year. The cassette will be available in this country from around October.