the "superduty" first came out in the '99 model year which also had the 8x170 bolt pattern. if it was a '98 model year then it would have been called a "heavy duty" and would have the 8x6.5 bolt pattern.
need some clarification on exactly which truck they came off of.
A forum community dedicated to British Columbia’s 4x4 owners and enthusiasts. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more!