Previously, there was the same rubber (I skated on it for five seasons, it was worn out to the cord, there were several punctures, and that was it), but the newer version of 94 Y XL has a stiffer sidewall and a speed index of up to 300 km/h, whereas the newer version of 94W lacks the XL and has an index of up to 270 km/h, but this rubber is softer.