The sole purpose of the narrow wide chainring is chain retention.
Chain guide 3 ring.
Bolt circle diameter bcd is the diameter of an imaginary circle running through the center of the chainring mounting holes.
Bike chain guide mtb bike protector road bicycle mountain cycle chain guide tensioner with hollowed design for single disc sprocket front dial smooth driving.
As you ride over rugged terrain your chain moves around quite a lot.
Often to the point where many riders no longer feel the need to run a front chain guide.
What does the narrow wide tooth pattern do.
The narrow wide chainring now mates seamlessly with the chain almost locking the chain to the ring without much increase in drag.
Upanbike mountain bike chainring guard 104 bcd aluminum alloy chain ring protector cover for 32 34t 36 38t 40 42t chainring sprockets.
Clutch type rear derailleurs like this xtr shadow plus help keep the chain from coming off the bottom of the chain ring bikeradar.
Choose a chain guide.
It is always defined in millimeters.
As mentioned above some set ups may not.
Onghsd bike chain guide bike chain deflectors mtb bike protector single disc chain guide positive negative teeth stabilizer universally for mountain bike road bicycle cycle 3 7 out of 5 stars 18 18 83 18.