The Real Mowgli

I just replaced the bottom bracket on my 1999 Fisher Ziggurat and see that the chainrings are badly worn.
Here's a cheap set of cranks with rings but someone in reviews says this set needs a 138mm spindle.
Maybe 138, way longer than my current 110 anyway.
If I buy this set and the cranks don't work on my bike I could just swap the rings to my current crankset right?

Here's the set at the jungle website - amazon.com/SHIMANO-Hybrid-Crankset-Black-175mm/dp/B002I7K5KS/

Here's my bike's specs - bikepedia.com/QuickBike/BikeSpecs.aspx?item=87170

Thanks

The Real Mowgli

...also my 9 speed cassette is HyperGlide.
Does my front chainset need to also be HG to work correctly?
Do HG systems need an HG specific chain?

Thanks

The Real Mowgli

OK, Google tells me HG is a sprocket configuration so it probably doesn't need specific chain & rings.

Nwvlvtnr 

Some missing information here, yes the the crank should be nearly a drop in replacement but would likely need a longer BB to dial in the chain line. Both cranksets appear to be 104 - 4 BCD out and likely a 64 - 4 granny. If the rings are a match you could use the new chain rings on the old crank avoiding a BB replacement.

https://www.sheldonbrown.com/cribsheet-bcd.html

Bill Kapaun

Are you sure the "wear" on your chain rings just aren't the various "shift aids" that are the norm on multiple chain ring bikes?
Not sure what those are? Look at a new bike.

Is the chain skipping? If not, the rings are probably good.

The Real Mowgli

It at least needs new rings. It's been abused.
All different shapes of teeth, mostly pointy and there's even a tooth missing from the middle ring.
Somehow the chain checks out as new-ish with my Park chain wear indicator. Not even .5 fits.
LBS said it might be stretched so much that it's reaching to to fit the next link. Smells like BS to me.

I'll post pictures after a few more posts. N00Bs can't post attachments until after 10 posts.

choddo

You’re supposed to use a HG chain on a HG cassette but in the real world…

Iride01 

Here is your picture. Yeah, that middle ring is worn!


https://www.bikeforums.net/g/picture/33004497

Bigger pic here.... https://cimg7.ibsrv.net/gimg/bikefor...ae99c5e035.jpg

Just let us know it's in the Gallery here and someone will add it to the thread for you till you get your magic 10 posts.

The Real Mowgli

There's an HG chain in my cart. On the flipside, will an HG chain work on a non-HG cassette?

13ollocks

I routinely buy a whole NOS crankset as a cheaper option to paying retail for new rings. If I can further recoup $$ by selling the unused crank arms, all the better.

The Real Mowgli

Thanks Iride01

See if I can even quote a picture in #8. I had to snip an URL out of a previous post.

...and I need to wait again. 5 posts in 24 hours limit. Will that limit also end after magical #10?

The Real Mowgli

I bought a replacement LX crankset with very good looking rings. Same as mine but it looks barely used.

The Real Mowgli

...and a NOS replacement HG 9 speed LX cassette from the same guy. That's 10 posts.

The Real Mowgli

https://scontent-bos5-1.xx.fbcdn.net...-A&oe=65F6D5CC

Weird. It says data corrupt when I try to post it as an attachment but the link to the picture works.

The Real Mowgli

BF doesn't seem to like posting pictures hosted at Facebook.
Not crankset (or bikes) related but here's an old pic I posted at a different site.



Alrighty then. This forum sofware doesn't like posting pics hosted at FB. Noted.

Leisesturm

Abused is really the right word for this drivetrain. I'm not sure it has enough miles to significantly wear chainrings. On many bikes chainrings are a lifetime installment. But these chainrings show evidence of numerous shifts under load. If that's you doing that ... you should stop. If you bought it like that from a previous owner ... eef, I wouldn't have. Not sure why the new triple needs so much longer a BB spindle. Can you double check that? But, as another poster noted, as long as the new crank isn't a unit triple with bolted together rings, then you can just move them over to your existing crank-arms. As for chain wear. Before you write off the LBS's BS, is it possible that they may be onto something? TBH I've never used a chainwear indicator in anger. When things start skipping is usually what I wait for. How many miles are on the drivetrain? No wear at all is just as suspect as so much wear that the odometer is coming around to zero again ...

veganbikes

So typically you want to post in other threads to get those 10 posts..get active in the threads, you will have some fun!

Ziggs are good bikes, I just built a frame up for a friend with some 10 speed Deore and some no name cranks disc front and V-brakes at the rear (because they are actual Shimano made brakes not just linear pull brakes from someone else) and the bike is quite awesome. A goofy little 1x10 mountain bike but was fun to ride the short time I rode it sadly it didn't fit me well enough to ride it but my friend was quite happy.

The Real Mowgli

He bought it new and rode the hell out of it every season for 20+ years.
He only replaced what broke and I don't know when if it ever saw the shop.

The new (to me) triple/cranks that are on the way are used but in very good condition.
It's the same model that's on it now so they use the same BB.
My original BB was a UN52, I installed a NOS UN55 that's regarded as a mild upgrade but same 73/110mm configuration.
Different spindle lengths are to line up different cranks/rings with the bike's frame geometry to keep a straight chainline right?

The set on Jungle website in my OP was just an idea.
I was considering swapping the rings but after a good look I'm in for replacing with better condition cranks as well.

I don't know where you got the idea that I checked the chain in anger lol.
The shop checked it and I checked it when I got my own indicator tool. None of us were angry
Can a chain stretch so much that a chainlength indicator tries to fit between the next set of links?
That's what LBS suspected. That the chain was worn a half inch over it's length. Doesn't seem possible.

All conjecture's moot at this point. New and near new complete drivetrain is on the way.

I know that everything I don't have to replace makes for better value but I like the bike and if it's 75% new by the time it's reliable that's OK. When I rode back in the 90's I replaced/upgraded everything on my Rockadile over time. The only thing original on it was the frame. At least if that happens again it's a helluva good frame.

bboy314

This is possible, but would be very easy to confirm using a ruler, or comparing with a new chain, or even just eyeballing it for an experienced mechanic.

The Real Mowgli

The drivetrain cleaned up real nice. Gap-toothed grin but shiny.


ZigguRatRod

The Real Mowgli

I misspoke.
I meant an inch over the length of the indicator, not over the length of the whole chain.
That would give the pins/rollers many percent of slop, not 1/2% to 3/4%

Russ Roth

In answer to the question you posted after this as well as this, yup, you can have a chain stretched to the point that it fits into the next space down. Only seen it a couple of times but it can happen. Gets real obvious when you toss a new chain on and it doesn't even try to fit between the teeth of the chainrings that have worn to match the chain.