Rennen Threaded Decimal 4-Bolt Chainring Description:
The Rennen Threaded Decimal 4-Bolt Chainring is a lightweight, precision-machined race chainring designed for riders who demand maximum drivetrain efficiency and durability. Constructed from high-quality aluminum and featuring Rennen’s threaded mounting system, this eliminates the need for traditional chainring nuts for a cleaner setup and easier installation. Its stiff, low-profile design helps deliver efficient power transfer while reducing weight, making it an excellent choice for competitive BMX racers looking for reliable performance on the gate and down the track.
This Decimal version uses specially designed tooth profiles to create “in-between” gear ratios that fall between standard whole-tooth sizes. This allows racers to make finer gearing adjustments for more precise cadence and acceleration tuning without making the larger jump of a full tooth size. The normal tooth sizes can be found here.
Features:
- Aluminum 7075-T6 chainring
- Built-in chainring bolt nuts eliminate the need for a chainring bolt wrench
- CNC machining with decimal teeth
- Fixing 4 screws
- For 3/32" chains
Specifications:
- Material: Alloy
- Bolt Pattern: 4 x 104mm
- Color: Black
- Weight @ 44.2T: 3.6 oz (102g)
Need new chainring bolts? Check out our selection of chainring accessories.
This product was added to our catalog on May 13, 2026
