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Drivetrain noisy on brand new IRO Angus.

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Drivetrain noisy on brand new IRO Angus.

Old 01-20-06, 06:03 PM
  #1  
cmcenroe
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Drivetrain noisy on brand new IRO Angus.

I know this has been discussed before...

Anyway, I just got my Angus the other day. I put it all together, cleaned and lubed the chain, and now it is noisy as heck. What is the deal? It is like I can hear every single pin in the chain hitting every tooth, front and rear. Is my drivetrain too tight or something? It also seems like there is a big tight spot in the drivetrain too, but this spot doesn't make anything louder or quieter.

Any suggestions?
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Old 01-20-06, 06:04 PM
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yeah try loosening a little bit.
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Old 01-20-06, 06:11 PM
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What he said^
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Old 01-20-06, 06:48 PM
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If it's new give it a few dozen miles to break in first.
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Old 01-21-06, 02:48 AM
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Is there something significant that happens in the first few miles or something?

Exactly how tight should the chain be?
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Old 01-21-06, 03:08 AM
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on my mark v w/ iro cranks - there is a big tight spot. i've been trying to straighten it out over for a while, but no matter what i do i get more variation over each turn of the pedals than i'd like.

instead of putting the crank at the tightest spot before i adjust the rear wheel, I put it a little past the tightest spot. that usually keeps the variation between 1/2 and 3/4".

a throrough coating of pedro's ice wax has kept my chain the quietest.

there was a rumor that Tony was upgrading the standard crankset in January. his website is under construction, so maybe it will be showing up after his vaycay.
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Old 01-21-06, 03:14 AM
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I already ordered new tires, plan on ordering a new seat, need to replace the brake shoes/pads, have replaced one tube, have patched an incomplete rim tape job, and plan to replace the crank. All these parts were marginal on the bike. I am happy with the frame and wheels, but the parts need some help!
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Old 01-21-06, 03:19 AM
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the IRC redstorms I got on mine have held up remarkably well. the tubes were ****, i busted both within a week. my rims were taped completely.

i plan to replace the drivetrain this spring when there's less salt and sand all over the road. the soma cog has been great, the kmc chain good enough, but the cranks, chainring and bottom bracket leave a lot to be desired
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Old 01-21-06, 05:35 AM
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When you pay less than $600 for a complete bike its gonna show. Not that there's anything wrong with IRO bikes...just that you are going to get low quality parts.
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Old 01-21-06, 09:56 AM
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Originally Posted by sers
on my mark v w/ iro cranks - there is a big tight spot. i've been trying to straighten it out over for a while, but no matter what i do i get more variation over each turn of the pedals than i'd like.

instead of putting the crank at the tightest spot before i adjust the rear wheel, I put it a little past the tightest spot. that usually keeps the variation between 1/2 and 3/4".
...
Have you tried loosening the chainring bolts to get it maybe more centered?
http://sheldonbrown.com/fixed.html#tension
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Old 01-21-06, 10:51 AM
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Originally Posted by sers

i plan to replace the drivetrain this spring when there's less salt and sand all over the road. the soma cog has been great, the kmc chain good enough, but the cranks, chainring and bottom bracket leave a lot to be desired
thats been my only gripe about my mark v, the bb & cranks. i swapped out the iro isis for a shimano isis bb which helped, but i still kept the cranks that came on it which were complete garbage, but they were black and that's what i did ask for. now i have a set of sugino's that i scored off ebay but gave the iro square tapered bb a shot, since they were at the lbs. this turned out to be a big mistake as a month into it and its making noises again, so i'll upgrade to a better bb.
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Old 01-21-06, 01:13 PM
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Interesting. What is wrong with the IRO BB? What is a suitable replacement?

Yes, my angus is brand new and it is giving me greif. I had a dream last night that the wheels self destructed and the cog turned into a freewheel.

As far as buying a cheap bike and getting cheap parts, all I can say is yup. My angus was $830. I upgraded the bars to B123's, and the stem to a jaguar. The parts do suck. The frame is nice, and the wheels are nice, and this is what I was looking for. I could have bought a Jamis or something, which was pretty much all nice parts, but the wheels suck on that thing. There are just comprimises all around, and the frame and wheels were good enough. I am thinking of upgrading to a sugino crank when funds permit, as I can tell that the IRO crank is kind of junky.
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Old 01-21-06, 04:17 PM
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Originally Posted by cmcenroe
Interesting. What is wrong with the IRO BB? What is a suitable replacement?

Yes, my angus is brand new and it is giving me greif.
i'm going to service the iro bb before i trash it, as i have been riding it in the rain and it may just need a little love before i hang it out to dry, since its fine, just a little noisy.

orginally between the iro isis bb & the black canondale isis cranks that came on it, one of the two(or combination of the two) flexed really bad and made a loud clicking sound. so i upgraded to a shimano isis bb and it was fine for a while, then it started making that clicking sound again. even with the upgrade, the cranks still flexed more than i really liked.

so i swapped out the cranks but had to change out the bb due the the suginos being square tapered and i figured i'd give the iro square tapered one a shot.

btw i knew that the cranks were on the low end side, but overall i'm a very satisfied customer, hell my mark v is now my work bike. its like having to change out a factory radio for better head unit, doesn't lower your overall opinion one bit.
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Old 01-21-06, 06:52 PM
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Are you positive your chainline is straight? Go check. If it is off, then there are a few things you can do to adjust. I just spaced out my BB and it helped a lot.
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Old 01-21-06, 08:18 PM
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It looks very straight. Is there a way to measure it?
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Old 01-21-06, 09:09 PM
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Don't replace anything just yet. From the back of your bike, eye up your chain from the cog to the chainring. If it veers to the left, space out your BB. If it veers to the right, you'll have to get a new BB or try putting the chainring on the inside of the spider.
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Old 01-21-06, 10:00 PM
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Originally Posted by karmical

orginally between the iro isis bb & the black canondale isis cranks that came on it, one of the two(or combination of the two) flexed really bad and made a loud clicking sound. so i upgraded to a shimano isis bb and it was fine for a while, then it started making that clicking sound again. even with the upgrade, the cranks still flexed more than i really liked.

there is no such thing as a shimano isis BB
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Old 01-21-06, 11:13 PM
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Originally Posted by BlastRadius
Have you tried loosening the chainring bolts to get it maybe more centered?
http://sheldonbrown.com/fixed.html#tension

yes, on several occasions. that's what i meant by "straighten it out"
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Old 01-21-06, 11:17 PM
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Originally Posted by baxtefer
there is no such thing as a shimano isis BB
ok so shimano 8 splined bb like this one...

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Last edited by karmical; 01-22-06 at 01:16 AM.
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Old 01-22-06, 12:19 AM
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otherwise known as octalink
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Old 01-22-06, 12:43 AM
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Originally Posted by trons
otherwise known as octalink
Otherwise known as octalink version 1.
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Old 01-22-06, 12:44 AM
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The chainline is good. I don't see it veering anywhere. It is just really loud, sounds like I am riding around on some deathtrap. I thought riding fixed was going to be sooooo quiet, I was sooooo wrong.
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Old 01-22-06, 01:59 PM
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Between the noisy drivetrain and eccentric chainring I think I have decided to replace the crank/BB when funds permit.
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