The oversized hollow axles and springs are made from steel

Flash 65 lumen: 3hr run time

Pros: Barely noticeable on your back

Narrow Wide tooth profile eliminates chain drop with the perfect chain mesh fit

This equates to a metric shed load of stability

RevGrips Pro Series Grips - Black With Oil Slick Clamps - S PDP|PLP|Rail Material The oversized hollow axles andRevgrips are the best thing to happen to the grip, ever. RevGrips have come out with a truly revolutionary idea, and they have executed it perfectly. With their patented shock absorbing technology these grips offer a level of comfort never before experienced on a bike, and they work wonders for reducing hand and arm fatigue. The feel of the Pro Series grips can be set to your liking with the included tuning washers, making them the most versatile