Solid knob tire?

[xr132]

Where can i get a tire like the turf tamer(18x11or9.5-8) only with solid knobs instead of hollow?

Like these only cheaper(less expensive): http://cgi.ebay.com/ebaymotors/ICE-Racing-Tires-Ice-Racers-using-Ice-Studs-QPS-/380181788173?cmd=ViewItem&pt=Motors_ATV_Parts_Accessories&hash=item588499b60d

[honda250sx]

To my knowledge. The tire listed above Cheng Shin C826 series tire is the only one with solid nobs. Thats a good price for a set of tires.