RENNEN Regular Chainring Bolts (x4) Gold
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Description
The Rennen Infinity chainring bolts are the result of obsessive work on one of the most mundane BMX components. Rennen Design Group reports 97 CAD iterations, 22 machining programme variants and numerous finite element simulations to produce this bolt, machined in-house in the United States on a multi-axis CNC lathe from 7075-T6 aluminium.
Two design choices set it apart. A shoulder located just below the head distributes the load instead of concentrating it on the thread, making it, according to the brand, the strongest 7075 chainring bolt on the market. And where the rest of the market uses a 5 mm hex socket, Rennen chose 4 mm: less material removed, therefore 8.5% greater strength. Rennen is confident enough in this design to offer a lifetime breakage warranty: a broken bolt is replaced.
This pack of 4 gold-finish bolts is suitable for 4-bolt chainrings (104 mm BCD). The Regular length (6.2 mm) is optimised for most crankset/chainring combinations. Fitted using 4 and 8 mm Allen keys.
Ref: 16086920954236
Key features
Lifetime Breakage Warranty: Rennen undertakes to replace any broken bolt.
Shoulder Under the Head: Distributes the load instead of concentrating it on the thread.
4 mm Hex Socket Instead of 5 mm: More material retained, providing 8.5% additional strength according to Rennen.
7075-T6 Aluminium Machined in the USA: In-house production on multi-axis CNC lathes.
Regular Length (6.2 mm): Optimised for most crankset/chainring combinations.
Pack of 4: For 4-bolt chainrings, 104 mm BCD.
Please Note: For an unthreaded chainring, also allow for a set of barrel nuts of the same length.
