This is a pair of electron 2.2" Buggy 4WD front tires. Pro-line engineers have emerged from the R&D lab with a new tread design to unleash to the world: the electron 2.2" 4WD front! so now you can get the electron in standard 2.2" or 2.4" vtr mounting style. The electron shares close family ties with pro-line's popular ion tire with the iconic dirt grabbing center tread and futuristic styling. The electron features connected tire tread technology to improve traction and wear on even the most abrasive of indoor track conditions. The square center pins laid out between the connected tread provide consistent forward and side bite even when the track gets Dusty. Test drivers are amazed at the precision steering and super-fast corner speed that the electrons provide. The electron wave is coming – don't get left behind in their wake. Get your own set of electron tires now! note: 2.2" style tires only work with 2.2" style wheels.*.