The British version of the description is as follows:The biggest, most radical freeride mountain biking event and AMS have joined forces to create these limited edition Berm Grips - Red Bull Rampage. These grips have a tapered diameter, with a thin inside and a thicker outside. They measure 29.5mm on the inside and 33.9mm on the outside. The grips feature a micro-diamond pattern with a waffle style at the center. They are designed with a single inside collar for locking. The pair of grips weigh just over 100 grams and have a total length of 135mm.