The SLX X-Series™ Dolly from In The Ditch™ is the latest generation of our Speed® Dolly; the #1 selling Dolly in the World! We designed our X-Series™ Dollies to be the best in every way. The SLX uses our Speed® Lube Through Spindle Lubrication. This option uses traditional style wheel bearings that can be greased by packing, or by using our Speed® Lube Through Spindle Greasing System. Servicing your Speed® Dolly has never been easier. Our Speed® Lube Spindle allows grease to be pumped into the center of the spindle with a standard grease gun. It forces new grease into the spindle and bearings pushing the old grease out through the dust cap opening. This completely repacks the bearing with new clean grease without the mess.