A practical replacement for MTB riders running a compatible Shimano or SRAM 8- or 9-speed triple crankset who want smooth shifting and a durable aluminium chainring.
Refresh your compatible MTB drivetrain with the BBB RoundAbout 5 chainring. It is CNC machined from 7075 T6 aluminium, giving you a strong, lightweight component designed to transfer your pedalling power efficiently to the chain.
The specially shaped teeth help make gear changes easier and faster, keeping shifting smooth when you need to respond quickly on the trail. This chainring is compatible with Shimano and SRAM systems using an 8- or 9-speed triple crankset with a 94 mm bolt circle diameter and five-arm mounting pattern.
Choose the 42T or 46T option to match your existing setup. Each purchase includes one chainring; check your current tooth count, crankset standard and bolt-circle diameter before ordering.
7075 T6 aluminium
CNC-machined construction provides a durable, lightweight chainring for regular MTB use.
Fast, smooth shifting
The special tooth design is made to help gear changes feel easier and quicker.
Shimano and SRAM compatible
Suitable for compatible drivetrains from both major component brands.
For 8- and 9-speed systems
Designed for MTB drivetrains using 8- or 9-speed gearing.
Triple crankset fit
Made for triple cranksets with a five-arm mounting pattern.
94 mm bolt circle diameter
Confirm your crankset uses a 94 mm BCD before purchasing.
Two tooth-count options
Available in 42T and 46T so you can replace your existing chainring with the matching size.
Single chainring supplied
The package contains one replacement chainring.
General
Materials & construction
Dimensions & weight
Compatibility
Sizing
Features
What's included
Part of your ride
BBB is a Dutch cycling brand established in 1998 by former professional cyclists Chris Koppert and Frank Moons. The brand develops cycling parts and accessories informed by rider feedback, personal cycling experience and prototype testing.
BBB offers more than 1,500 products across 40 categories, with products sold in more than 40 countries. Its range is designed at the company’s headquarters in Leiden, the Netherlands, and the brand has received more than 100 product and innovation awards.
