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Roll on Spring Time!
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Discussion Starter · #1 ·
I am no expert at setting up a drive chain but I am able to get it pretty dialled. I have a Knolly Delerium and while I have noticed a reasonable amount of chain slap while descending I just recently noticed there was a fair bit of wear right at the rear pivot. I have tubing wrapped around the chain stay but I cant run it right over the pivot etc. I was wondering why it would be so bad right near the cassette so I pushed down on the chain above the chainstay and noticed it felt pretty slack.

I have set my chain to the recommended length and removing an additional link would probably be pushing the limit of the rear deraileur when in the highest gear on the cassette. I am running a medium XT deraileur and 32t front ring. With the chain in the highest gear the tension on the deraileur is obviously much better but this is not where I spend 95% of my time. The chain will obviously sit higher off the chainstay too.

There are 2 things I can identify:
The rear deraileur doesnt generate enough tension.
The Hope Pro 2 cassette has alot of movement between engament points.

I am not sure how to determine if I can run a short cage deraileur and I am not sure if my reasoning on the lack of engament points on the Hope hub has a contributing factor. Maybe the Hope springs also do not have enough tension.
I have already put some thought into trying a better hub. While I have been running Hopes for years I figured I woudl try something better to see what it would be like, Hope free hub bodies also notch real easy.

Anybody got some suggestions?:
 

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i also have a delirium t (and a delirium for all of 5 days) like yourself i have sufferd from chainslap. i run a hammerschmidt on my dt, and swapped over to a small cage derailiuer this helped,
but on my recent trip to whistler, when i had to get my dt built back up, i noticed that i was getting lots of chainslap again.
i would say, is it possible for you to run a chain tensionor device with your current set up. if not then look ino a short cage mech. i have a x9 on my dt, but i believe the saint has a much stronger spring. so maybe look into a saint rear mech.
or look into removing a link from your chain.
good luck mate hope you get it sorted.
 

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Slap happy crappiness
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1,090 Posts
I have set my chain to the recommended length and removing an additional link would probably be pushing the limit of the rear deraileur when in the highest gear on the cassette. I am running a medium XT deraileur and 32t front ring. With the chain in the highest gear the tension on the deraileur is obviously much better but this is not where I spend 95% of my time. The chain will obviously sit higher off the chainstay too.

There are 2 things I can identify:
The rear deraileur doesnt generate enough tension.
The Hope Pro 2 cassette has alot of movement between engament points.

I am not sure how to determine if I can run a short cage deraileur and I am not sure if my reasoning on the lack of engament points on the Hope hub has a contributing factor. Maybe the Hope springs also do not have enough tension.
I have already put some thought into trying a better hub. While I have been running Hopes for years I figured I woudl try something better to see what it would be like, Hope free hub bodies also notch real easy.

Anybody got some suggestions?:
I think you're confused as to what your high and low gears are. High gear in the back, smallest ring, low gear, biggest ring. From what you said in the first paragraph I quoted it sounds like you have these terms flipped.
Hope Pro 2 isn't your cassette, it's your hub. And yes, your hub has a lot to be desired when it comes to engagement. Your hub is only 24pt engagement, meaning every 15 degrees it will engage. That's a bit of free movement, but doubt it's your problem.
Der cage length may be able to be changed, but that's more dependent on your cassette range, which we don't know. Also, Shimano derailleurs aren't known for their strong springs, which may be a contributing factor.
Post a picture of the area that's getting the chain slap. Some 3m mastic tape or velcro might be helpful.
 

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Roll on Spring Time!
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Discussion Starter · #4 ·
Yes I need to take a picture. I have the big Sunday session today and then the bike is getting some tear downs tomorrow. I can take a pic then. Really its no major thing but the bike is so dialled that this just seems like something I could improve on. I am considering a small rear Saint might be the way to go and then work from there. Currently running 32t front and 32t casette with medium XT shadow Der running the recommended chain length.

Sorry bout the Hope cassette reference, rushing to post before leaving the office so I could get the thread up and info in before I do my planned maintenance tomorrow. Every time I am thinking bout my rear Pro 2 hub and can only see those dam notches in the freehub from the cassette, hence the nubbie slip up. And yes I can never remember which is the high and which is the low gear. I also know its the opposite of what I think but I never make reference to it so end up forgetting and just wing it.

I agree about the Pro 2 Hubs but they have served me well for years. I am getting to the point now where I dont spend any money on my bikes so I figured I could afford to plash out on a better hub and give it a try.
 
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