Baselines are shipped with the tire unattached and the consumer does have to put the tire on the machine. This tire needs to be attached with the lug nuts we supplied. Please make sure to put the lug nuts on with the tapered side towards the rim. This locks down the wheel, just like it does on your car tires. If you have the flat side of the lug nuts facing towards the rim, your tire is going to vibrate like crazy.