does there exist a chart or something for adjusting your chain size according to your sprocket size? I've got a 15t in front and will probably get a 42-44 in the back. I did a few searches for this info but didn't find much??.....
common sense....
down 1 and up 3-5....
2-4 links longer
So...
By that reasoning, minus 1 tooth front plus 3-5 rear corresponds to the same total number, 2-4, links added to the chain.
It would seem to follow...
Since standard front spkt. is 16 tooth, I think, and standard rear is 39 tooth, total is 55, that would imply a 55 link chain. But standard chain lenght is 110, again, I think...
So math says a factor of 2 relates total number sprocket teeth to chain links, as opposed to common sense's 1 to 1 ratio. Thanks for your help tho man... Anyone really know what size chain I should buy?
I went up 6 teeth on the rear sprocket & went with a 14 tooth chain. 15 would have worked too; 16 (that I bought) was too long.
You're better off getting a few links longer & cutting it down. I used a grinder to cut it & punched the pin through with a screwdriver.
Playing with this Tsubaki calculator a few minutes, I came up with an ideal center distance of 25.697" for the standard 16/39T and 110 links.
A few more minutes yields an ideal center distance of 25.787" for 15/43T and 112 links.
Works for me. Your bike, your money, your choice. :)
Have fun.
http://tsubaki.com.au/tsscs/chain_length.htm
Thanks... that calculator is just the trick. What are and how did you determine 'chain pitch' and 'center distance'?
A 520 chain has a 5/8" pitch indicated by the "5" and is 2/8" (1/4) wide between plates indicated by the "2". Use .625 pitch to calculate.
I just guessed about 24" center distance and a couple tries came up with the 110 links and approx 25.7 center distance for 16/39T. Just use a 25.5" center distance to calculate for the new sprocket sizes. The calculator will yield the number of links and the new ideal center distance.
I have 1 down 2 up, and the oem chain size is good.