PREMIUM REPLACEMENT PART We strongly suggest comparing the posted picture to your faulty unit! FRONT AND REAR SPROCKETS FITS ON TRIUMPH STREET BIKEDAYTONA T595 1997-1998 FEATURES:1. FRONT SPROCKET 18 TEETH2. REAR SPROCKET 43 TEETH All MOTORCYCLE and ATV chain lengths are expressed by the number of pitches or rollers within it.If you have an old chain and that is in need of replacement and you wish to check the length just count the number of rollers in it including the rollers on each end. If the number is an odd number,then it must have a half link in it. If the chain is very worn, and its history is unknown eg. you have purchased a motorcycle with a worn chain on it, please be aware that sometimes a roller or two may have been removed by the previous owner in an attempt to re-adjust it. In such cases, there is a danger of purchasing a new chain which is too short, so if there is any doubt it is always better to purchase a new chain which has more rollers than the worn one.