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Discussion Starter · #1 · (Edited)
D'oh, Monocog 29er Hub *not* biting the dust... Operator Error

Edit 2:15 AM
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If I would have taken a few more steps before I posted this I would have saved y'all some trouble...

Although this wasn't exactly what KeylessChuck or cosheese said in their responses, they were certainly close enough that I should have immediately checked a little closer.

I decided not to wait to take it into the shop, and to go ahead and take the hub apart tonight, so I pulled the rear wheel, got my spanner and chain wip to pull the lockring off. It was snug--no play that I could feel--but when I stuck the spanner on it the ring wasn't as tight as I will normally tighten one.

I pulled the cog off and found a little piece of sand/grime stuck down in the groove of the freehub body. I cleaned it out, wiped down the whole thing, and then put the cog back on and tightened it down. Put it back on the bike and the hub is fine. Apparently the cog was pushing up against the crud in the groove and was kind of clicking when the chain pulled on that part--even though the ring felt tight.

My apologies to Redline and everyone who replied, for not having checked things out a little closer before I posted.

If anyone knows how to change the name of this entire thread to "D'oh! Redline Hub is fine... Operator Error!", then please let me know.

Regards,

Jerry

Please disregard the rest of this post. I'm leaving it here so others can learn from my mistake.
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End Edit

Dang!

I've had the bike for 10 days, put 30-40 urban miles on it, and last night I took it out on one of the regular trails for it's first real loop on some singletrack. Had a few decent climbs where I had to stand up and hammer up them, but no drops over about 10", and just a few of those.

Riding across the parking lot headed back for the car I noticed a clunking noise. Got home late and put the bike up and after work today when I checked it out--there is very definitely a nasty sounding grinding kind of clunk coming from the cassete side of the hub. It only does it while pedaling--sounds fine while freewheeling.

For those of you who have had Redline hub problems--how has your shop handled it? Do you have to wait from a replacement from Redline?? How long did it take? Is there something else I should check before writing off the hub?

I'm also having and on-again/off-again creaking problem (I posted earlier as rxwr80). The shop was great about it and Redline said they'd have a new frame out to me by last Thursday. Well it still hasn't come in--almost a week later. Not sure what the story is on that one.

This is a huge bummer because I am loving this bike!
 

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Did you check to see if your cog lockring is tight? If it's loose enough it could rub on your frame while pedalling and be fine while freewheeling.
 

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Discussion Starter · #4 ·
KeylessChuck said:
Did you check to see if your cog lockring is tight? If it's loose enough it could rub on your frame while pedalling and be fine while freewheeling.
cocheese said:
Not to be a ditry-bird, but say "cog lockring" 10 times fast. ;)
You're certainly not being a ditry-bird (whatever that is :) ) and I would gladly admit my ignorance if it was, in fact, the lockring, but in this case it's not.

I have it in the workstand now. The lockring is tight. No wobble in the cog. No discernible play in the hub. Just a fairly steady knocking that sounds like it's coming from inside the cassette.

I'm not going to pull it apart until I talk to my LBS tomorrow and see what they recommend. After that I might pull it apart and try repacking the bearings if they aren't cartridge bearings (never messed with a BMX hub before).

Anyway, thanks for the suggestions--I do appreciate it.
 

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Two things;

1. Is your chain too tight?
2. Is there play when you hold the frame and grab the tire and move it side-to-side?

I think its probably the chain is too tight. You want to adjust it so that it cranks easily backwards and forwards. There should be a little play in the chain too, about a quarter to half inch when you press down on the chain.

When I got my 29er I went over everypart and re-lubed and torqued it before my first big ride. I trued an dished my wheels. The hubs looked fine on mine, no play, but there was a noticeble "hop" in the rim that took come careful work to smooth it out. If it were the bearings it would happen all the time.

b
 

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Discussion Starter · #6 ·
johnnyb said:
Two things;

1. Is your chain too tight?
2. Is there play when you hold the frame and grab the tire and move it side-to-side?

>>If it were the bearings it would happen all the time.<<
Nah, the chain has about 1/4" of sag at it's tightest point during a revolution and about 1/2" of sag the rest of the way through a revolution of the cranks (the guys at the shop said most BMX rings are slightly out of round and as long as the chain doesn't skip or fall off, you're okay--works for me).

No side to side play at all in the hub.

It's pretty consistent too. Seems to knock once per revolution of the hub. Could it be pawls inside the hub?

Thanks for the responding though!

When i first heard the noise I was hoping it was just a tight link in the chain or something. Nothing so simple unfortunately.
 

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Discussion Starter · #7 ·
D'oh! Operator Error -- Redline hub is fine

================================================== ======
If I would have taken a few more steps before I posted this I would have saved y'all some trouble...

Although this wasn't exactly what KeylessChuck or cosheese said in their responses, they were certainly close enough that I should have immediately checked a little closer.

I decided not to wait to take it into the shop and to go ahead and take the hub apart tonight, so I pulled the rear wheel, got my spanner and chain wip to pull the lockring off. It was snug--no play that I could feel--but when I stuck the spanner on it the ring wasn't as tight as I will normally tighten one.

I pulled the cog off and found a little piece of sand/grime stuck down in the groove of the freehub body. I cleaned it out, wiped down the whole thing, and then put the cog back on and tightened it down. Put it back on the bike and the hub is fine. Apparently the cog was pushing up against the crud in the groove and was kind of clicking when the chain pulled on that part--even though the ring felt tight.

My apologies to Redline and everyone who replied, for not having checked things out a little closer before I posted.

If anyone knows how to change the name of this thread to "D'oh! Operator Error -- Redline hub is fine"... please let me know.

Regards,

Jerry
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