Rennen Infinity Bolts are the latest product developed out of the new headquarters. We took one of the simplest components on a BMX bicycle, the chainring bolt, and we made it better.

Back in 2008 we redefined the BMX Chainring through our threaded gear innovation, we took something so simple and made it so effective.

Rennen has done it again with the Infinity Bolt. A simple but very effective shoulder just under the head of the bolt serves to distribute the load (see below) and make this the strongest chainring bolt on the market.

While all other bolts on the market use a 5mm internal hex we chose 4mm to provide more material and increasing their strength further by 8.5%

At Rennen we like improving things that are not obvious and we believe we have achieved that with the Infinity Chainring Bolt.

Rennen are so confident in this design they are offering a lifetime warranty against breakage. That's right: break a bolt, and get a new one under warranty!

For something as simple as a chainring bolt we ran this design through 97 CAD iterations, 22 CNC G-Code variations and numerous FEA simulations.

We purchase USA made material and produce these on a state of the art multiaxis CNC lathe in house. We do things this way because then we have full control over our designs and production, and the alternative of ordering parts out of a catalogue is unoriginal and boring.

Rennen stands by their designs and products, the quality shows.

Chainring Bolts use a 4mm/8mm allen wrenches for assembly

Regular length has been optimised to work with most gear crank combinations