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  1. #1
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    chainring size on a 1x10

    is there some sorta magic formula to figure out what size chainring i should order for my 1x10 setup or is it basically trial and error. Im currently running a 32t ring but changed my mind on the color and ordered a new one 33t, i doubt im going to feel a difference in the 1 tooth bigger but i noticed there was much larger chain rings available like 36t, 38t, 40t

  2. #2
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    No magic formula. It depends on your terrain and your riding style. Most folks just go with 32t. I ride hilly technical terrain and use a 30t chainring on my 1x9 to get a lower climbing gear, and it still gives me plenty of top end speed.

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    60 tooth or go home

  4. #4
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    Quote Originally Posted by customfab View Post
    60 tooth or go home
    Win

  5. #5
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    32T is the sweet spot for the average rider - assuming 26". (29 or 30T on a 29'er). If you're above average and/or ride not so hilly terrain, go up to 34 or 36T.

    If not, 31 or 30.


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  6. #6
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    Long time 1x9 riders here. My take, start with 32t and build up from there. Ive been riding a 38x11/34 9sp system on my 6" travel rig for years now. Im currently building up a 29er with 1x10 system and will probably start with 36t and 11/36 cassette, we"ll see how it goes. Good luck and remember dont give up, it will get easier, the human body is an amazing machine and insanely adaptable.
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  7. #7
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    Quote Originally Posted by jabrabu View Post
    No magic formula. It depends on your terrain and your riding style. Most folks just go with 32t. I ride hilly technical terrain and use a 30t chainring on my 1x9 to get a lower climbing gear, and it still gives me plenty of top end speed.
    cam you find a cheap 30T chain ring? most company only does 32T the smallest

  8. #8
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    Quote Originally Posted by bapesta View Post
    cam you find a cheap 30T chain ring? most company only does 32T the smallest
    For the standard 4-arm cranksets with the 104mm bcd, the smallest chainring you can fit is usually a 32t, unless you use the granny ring position. This is why you usually see 32t as the smallest available. For the older 5-arm compact cranks with the 94mm bcd you can go down to 29t, but it's harder to find chainrings that fit those.

    Some newer double cranks have a 120/80 bcd, and on those you could do a 28/bash or 30/bash, but singlespeed chainrings are not widely available for them. You could get chainrings made, though, from someone like Homebrewed Components (HBC).

    I use a spiderless chainring, which allows using any size you want. I use a 30t chainring from HBC, on a 29er.
    Attached Thumbnails Attached Thumbnails chainring size on a 1x10-niner%2520build%252021aug%2520001.jpg  

    chainring size on a 1x10-niner%2520build%252021aug%2520004.jpg  


  9. #9
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    Quote Originally Posted by jabrabu View Post
    For the standard 4-arm cranksets with the 104mm bcd, the smallest chainring you can fit is usually a 32t, unless you use the granny ring position. This is why you usually see 32t as the smallest available. For the older 5-arm compact cranks with the 94mm bcd you can go down to 29t, but it's harder to find chainrings that fit those.

    Some newer double cranks have a 120/80 bcd, and on those you could do a 28/bash or 30/bash, but singlespeed chainrings are not widely available for them. You could get chainrings made, though, from someone like Homebrewed Components (HBC).

    I use a spiderless chainring, which allows using any size you want. I use a 30t chainring from HBC, on a 29er.
    I'm talking abt the 4-arm 104 bcd chain ring...

  10. #10
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    Quote Originally Posted by bapesta View Post
    I'm talking abt the 4-arm 104 bcd chain ring...
    Home Brewed Components sells a 31 tooth for 104 BCD. $35.

  11. #11
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    Quote Originally Posted by bapesta View Post
    I'm talking abt the 4-arm 104 bcd chain ring...
    Anderson Machine sells a nice 104 BCD 30t. It is spendy but to me it was worth it. You just have to file a tad off your spider arms to make it work. It took me about 10 minutes with a $4 file and your cranks can still be used for a 3x if you ever go back that direction.






  12. #12
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    I'm running a 32t with a 12-36 on my 29er and the range is great coming from single speed only for the past 6 years. I am however, considering trying a 33t or 31t (I didn't realize you could get those for 104 BCD until reading this post) at some point because I seem to be missing a "sweet spot" ratio for me in between a couple of the cogs. I guess at some point I could figure out which ones they are and do a little math and whatnot.

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