S-Crash Iceblades can convert your aggressive skate to iceskates.

Use the chart below to choose your size. Messure the distance between the center of the front wheels to the back wheel of your frame.

Size 0: from 200 to 235 mm
Size 1: from 225 to 258 mm

So if the distance between your front and back wheel is 260mm then you need size 2

The blades are used in combination with 6mm wheel axles. These are NOT INCLUDED. Order the 6mm bolts here if you dont have them:
http://skateshop.thisissoul.nl/iceskates/739-rsi-s-crash-iceblade-6mm-bolts.html

Only old skates like K2 and Roces still use 6mm bolts. If you have an old skate and want to know if the bolts are right, then you can just messure the diameter/thickness of the axles.

There are two iceblades in one set.