Our rubber tracks are designed and manufactured with cutting edge technology to ensure you get the best products available. orginially tracks were designed in the conventional style with sizes such as 300x109x41 these could only be used on undercarraiges that were exclusively designed to use rubber tracks. On this stye of track the rollers do not have contact with the metal guiding except for the purpose of guidance and derail protection. From the nature of these machines each was designed to run on either rubber track or steel track design ( but not both) so the sprockets idlers and top and bottom rollers are different.