How to measure chainring bcd with different angle
So How to measure chainring bcd we make it and here these list of awesome for your trick and information reason regarding the How to measure chainring bcd as part of How To Do exclusive updates collection. So, take your time and get the best How to measure chainring bcd images and pictures posted here that suitable with your needs and use it for your own collection and personal use.For the xx1 spider, we recommend the 6mm bolts (or any short m8 chainring bolt). If it is not labeled on your chainring you will need to measure it.
Threaded for standard m8 chainring bolts. It is critical to know the bcd of your crankset when you are selecting a new chainring for your bike. Chainring b olt c ircle d iamater guide.
I believe sheldon brown also has a table of distances from one bolt to the adjacent one for each bcd.
Threaded for standard m8 chainring bolts. Figuring out what size chainring you have is pretty easy, it's just a matter of knowing what size bolt circle diameter (or bcd) you have. All you need to do to calculate the bcd is measure the hole spacing a between adjacent holes, count the number of holes n and plug them into the equation above to calculate the bcd. You could measure the distance from the bb spindle to the center of one bolt hole (gives you the colt circle radius) and double it.
