When we created TPi regular bolt for the luxury and European market, we decided to go far beyond industry standards and bring a product to the market that is unmatched in quality. TPi product is therefore "Exceed Customer Expectations"Download PDF
When we decided to create the Round Bolt, we wanted it to maintain all the physical properties of our regular lug bolts, but with improved characteristics.
TPi Round Bolt is able to be installed and removed with a 17mm hex socket.
TPi Round Bolt is flattened on the side with tapered edge to provide more surface area for the torque distributed evenly.
TPi Round Bolt provides more surface area, which dissipate the heat created by the revolution of the wheel while running.
Slightly tapered edges on top of the Round Bolt allow a smooth and tight fit for the bolt and socket.
TPi Round Bolt is 3 grams lighter than the regular lug bolt.