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  1. #1
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    30T 58 BCD chainring?

    Anyone know if such a thing exists, or where to get one? Failing that, perhaps reasonably priced custom fabricators?

    I want to bolt direct to a Surly Mr Whirly crank arm (100-mm spindle) and have 1x10 with 65 mm chain line, foregoing Surly spider - which is prone to failure, judging by anecdotal internet evidence. Narrow-wide would be the ultimate, but I assume there's fat chance of that.

    Best I've found so far is Middleburn 28T.

    Cheery-pip!


    Sent from my iPad using Tapatalk

  2. #2
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    I've seen them in 94bcd, but not 58.
    You're so cute internet tough guy. Noogie...Noogie...Noogie.

  3. #3
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    Here ya go!
    5 Bolt 58mm Chainring

  4. #4
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    30T 58 BCD chainring?

    Thanks, that looks cool! Just mailed them to find out if it is 10-speed compatible. They specify that it is for 3/32" chains, so I suppose strictly speaking it should not be, but these chain plate width specs are often used quite loosely.
    Last edited by ionofchios; 21 Hours Ago at 05:02 AM.

  5. #5
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    I had mine laser-cut from stainless steel, teeth were machined to suitable width:



    It's a job any decent machine workshop can perform (provided they can cut sheet metal to shape) as long as you have proper drawings.

    These are 33t, but you get the idea.

    I designed two sets of extra holes, so this chainring also works as a spider for a second chainring or bash guard. One set is four holes with a 104 mm BCD and the other set is five holes with a 110 mm BCD.

  6. #6
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    30T 58 BCD chainring?

    Thanks, Saul.

    Where did you get yours done, if you don't mind my asking?
    Last edited by ionofchios; 15 Hours Ago at 11:18 AM.

  7. #7
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    I think with a little more pressure Wolftooth Components will make one.

  8. #8
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    30T 58 BCD chainring?

    Thank, Volsung. Just mailed them as well.

  9. #9
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    30T 58 BCD chainring?

    Quote Originally Posted by Saul Lumikko View Post
    I designed two sets of extra holes, so this chainring also works as a spider for a second chainring or bash guard. One set is four holes with a 104 mm BCD and the other set is five holes with a 110 mm BCD.
    Thats I cool idea - bit like the Surly MWOD rings.

  10. #10
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    30T 58 BCD chainring?

    Wow, got an almost-instant reply from Wolf Tooth:

    'We don't have one, but it is now back on our radar after a lot of the new Surly and Salsa bikes have that crankset. I don't have a date for you, but you can stay tuned via our Facebook and Twitter or just send an email in a couple months.'

    So, I think I'll try to find a way to hold out for this and hope it comes through

  11. #11
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    Quote Originally Posted by ionofchios View Post
    Thanks, Saul.

    Where did you get yours done, if you don't mind my asking?
    Mr. Antti Konga made these, hence the AK logo. Konga Bicycles | Polkupyörä mittojesi mukaan
    The laser-cutting was made by an external workshop, though. Konga did the milling.

    I probably did have the MWOD in mind when drawing the initial sketches, since I had Mr. Whirlies already and had used them with a 26t chainring + bash guard made by myself.

    The 33t chainring (which has a 36t chainring next to it now) was part of my dinglespeed project and I felt that 26/16 was too much of a "micro drive". Larger chainrings + cogs provide similar gear ratios but turn smoother and are less likely to drop the chain. So the bike is 36/18 or 33/21 now, former for commuting and easy terrain and latter for more difficult trails.

  12. #12
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    30T 58 BCD chainring?

    Thanks, Saul - I'll keep this in mind as a backup option, in case Wolf Tooth aren't able to produce one.

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