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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 07-12-07, 08:00 PM   #1
Surferbruce
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snapped another IRO/Formula hub locknut

that makes 3 times. also makes twice i've been stranded on my fixed and had to rely on the celly, as opposed to zero times on my geared bikes. thats irrelevant anyway, but i want to buy a handful of Formula locknuts and keep one or two in my repair kit. I can call Iro Tony and order some, but where else can i get some online? I also need a few fresh axlenuts. Business cycles maybe?
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Old 07-12-07, 08:16 PM   #2
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Why would you want MORE iro/formula nuts if you have already broken 3 of them???
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Old 07-12-07, 08:23 PM   #3
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I know this doesn't answer your question, but is it the nut on the outside (with the swiveling part) that breaks, or is it the locking nut on the inside? I have yet to break one, but reading the posts about this has me worried.
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Old 07-12-07, 08:28 PM   #4
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just get a better quality lock ring for cripes sake like a dura ace one or a soma just make sure it matches the threading on your hub
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Old 07-12-07, 08:32 PM   #5
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It's not the lockring, it's the axel locknut.

I've broken 3 of mine as well, and I've basically concluded that the formula/iro locknuts are ****, but you also have to be sure that the cones are properly tightened, because I know when I broke one of mine it was loose, which did it in.

Just get some from the LBS.
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Old 07-12-07, 08:39 PM   #6
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then your over tightening them if you are afraid of dropout slippage just get a chain tug bmx ones work just as good as the "track specific" ones
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Old 07-12-07, 08:43 PM   #7
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it's not the axle/track nut on the outside, but the locknut/washer that rests against the inside of the dropout/fork end. it seems they're stamped, which may be intentional to avoid bearing damage from overtightening, but i think i just forgot to snug it down last time i took off/put on the wheel. anyway, the other side has one i got from the lbs, but it's a slightly different thickness and diameter and has no wrench flats like the stock piece. (although maybe i just have to find something similiar seeing as that one hasn't snapped)
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Old 07-12-07, 08:44 PM   #8
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I broke one the other day; I was doing some work to the bike (regreased BB, cleaned the chain, gears, etc) and noticed it was loose early on, forgot then tighten the wheel and went for a ride... snap...
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Old 07-12-07, 08:44 PM   #9
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sorry for so many forward slashes/dual terms...
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Old 07-12-07, 08:53 PM   #10
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hmm thats just damn weird if you don't mind me sayin
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Old 07-12-07, 09:16 PM   #11
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Just make sure that they're tightened up to the spacers properly. If they're loose when you tighten the track nuts they will snap.
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Old 07-12-07, 09:22 PM   #12
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I don't believe this. I posted an hour ago, and when I went to check my chain tension since it felt loose earlier, the locknut one one side of my hub was broken. I think that side may have been slightly loose when I tightened it down; I can't remember.
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Old 07-12-07, 09:30 PM   #13
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Quote:
Originally Posted by Retem
then your over tightening them if you are afraid of dropout slippage just get a chain tug bmx ones work just as good as the "track specific" ones
+1, because of overtorquing due to fear of slippage, I broke two locknuts and two axle nuts in my first 3 weeks of fixed riding, got a tuggnut (and modified it for horizontal dropouts) and never had a problem after that.
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Old 07-12-07, 09:55 PM   #14
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This has been talked about a few times on the forum, and I think that the general consensus was that the Formula locknuts are prone to breaking.

It's also possible that since Formula is the hub of choice for the green fixed gear rider, they're more prone to being over-tightened, and hence, to breaking.
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Old 07-12-07, 10:07 PM   #15
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I've had my IRO hub for 3 years and never broken one. Weird.
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Old 07-12-07, 10:20 PM   #16
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I broke one.. I dont know how though, Its on my beater fixed gear bike, I drop it all the time in bike polo, and doing skids
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Old 07-12-07, 11:07 PM   #17
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I broke both sides of my IRO rear, with no adjustments, after three years of use. I replaced them with super generic steel nuts with the same threading (got them from a bike co-op in Montreal) and have never had a problem since. I wouldn't bother with replacements from IRO, just find something local. Shouldn't be too hard in most cities.
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Old 07-13-07, 12:40 AM   #18
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Originally Posted by SSSasky
I broke both sides of my IRO rear, with no adjustments, after three years of use. I replaced them with super generic steel nuts with the same threading (got them from a bike co-op in Montreal) and have never had a problem since. I wouldn't bother with replacements from IRO, just find something local. Shouldn't be too hard in most cities.
Was the bike coop RTM?

Anyhow, when I got my formula front at a newly opened coop LBS (Belleville), Tony told me about this issue and said he bought in some replacement nuts, I guess you can't go wrong with some heavy duty steel nuts
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Old 07-13-07, 01:26 AM   #19
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I agree with the others. Time to try something else.
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Old 07-13-07, 02:48 AM   #20
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My formulas are a year old and I have tightened them like manimal with no problems

ask cynikal he knows I destroy bikes likes its old news

Last edited by Retem; 07-13-07 at 02:55 AM.
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Old 07-13-07, 08:38 AM   #21
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Yes, it was indeed RTM. They let me root around for a while in the random nuts and bolts until I found the right thing. I think I left some parts in trade. Love the RTM.
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Old 07-23-07, 07:08 AM   #22
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Just broke my first one...where do you get replacements? They're metric 10 x 1 pitch, that's all I know.
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Old 07-23-07, 07:23 AM   #23
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I broke one a little while ago and had it replaced with a generic one off a trashed wheelset. I think the problem arises from the cone and locknut coming seperated. Even though I tighten them down they always come loose.

I'd like to get some spares as well! Should we email Formula?
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Old 07-23-07, 07:50 AM   #24
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I've broken the locknut and axle nut a couple times each. When you replace them, buy some other brand. I bought some axle nuts from harris that were better and used locknuts out of a bin at the LBS. I thought the formula axle nuts were cheap-o anyway.
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