Tacx T3125 Gem Bikestand Your road or mountain bike is probably one of your most prized possessions, which you cannot just lean against the wall. That is why Tacx has developed the Gem Bike Stand. It has a powerful design and the stand is extremely handy for your bicycle. You can simply sit the rear triangle of your bicycle in the plastic hooks and your bike is safely parked. And because the rear wheel is slightly suspended you are also able to perform minor adjustments, to your gears for instance.