With the tire fully compressed there is enough room to put through --two--- 2.25" pipes. A rough mockup here: http://www.rc-tech.net/cars/panttransam/1905/ex/exmock2.jpg http://www.rc-tech.net/cars/panttransam/1905/ex/exmock1.jpg http://www.rc-tech.net/cars/panttransam/1905/fit/wheel.jpg Gary