View Full Version : Movement of Wheel
Splash
12-03-2016, 11:52 AM
Hello all.
So i prepare for my morning ride and check the rear wheel on my bike.
I grab the top of my rear eve 6.7 wheel/tire with CK R45 hub (which is locked into it's position on bike), and try to move it side to side, i see movement - about 2-3mm.
I am not sure what is the accepted displacement. Can you advise if any movement is acceptable? What could be the cause of this movement?
Splash
Cicli
12-03-2016, 11:54 AM
Bearing is loose. Should not be.
Splash
12-03-2016, 12:07 PM
Thanks, I have had to now cancel my ride due to this :-(
Anyway, what needs to be done to tighten up the bearings?
Splash
Tickdoc
12-03-2016, 12:14 PM
How many miles? Sounds like new bearing day, sorry for your loss of ride.
Splash
12-03-2016, 12:20 PM
Thanks.
Funny thing is, I just had this hub worked on by a LBS to service the bearings (i think he inserted a new one in too)?
Back to the LBS :-(
SPlash
ergott
12-03-2016, 12:37 PM
I could simply need a quick tightening of the adjustment collar. Check CK's site for the instructions, it's pretty easy.
bshell
12-03-2016, 12:46 PM
Unless they messed something up at the bike shop, you just need to adjust the pre-load. There is a little tool that slips over the collar but you often don't even need it.
parallelfish
12-03-2016, 01:33 PM
Adjustment time. Simple task. These hubs typically need periodic adjustment when new. They eventually settle in and do not require much attention after that.
https://s3-us-west-2.amazonaws.com/ck-wordpress-media/wp-content/uploads/2016/08/R45_R45Disc_Manual-17988_small.pdf
Splash
12-03-2016, 02:08 PM
Much appreciated guys.
SPlash
SoCalSteve
12-03-2016, 02:39 PM
Thanks.
Funny thing is, I just had this hub worked on by a LBS to service the bearings (i think he inserted a new one in too)?
Back to the LBS :-(
SPlash
I had a set of R45's worked on by my lbs as well. Came back to me with the exact same issue. Took it back and he said he fixed the movement ( he didn't and blamed Chris King )...:crap:
Turns out it's a simple fix which you can do with a 2mm Allen key ( I think 2mm ). I'd be happy to try to explain it, but you'd do better by checking out the CK website or just googling it. That's how I found the ( simple ) fix.
Too bad you had to cancel your ride because of it. It's like a less than 5 minute fix.
As for me, I won't go back to that bike store again.
Good luck!
Splash
12-03-2016, 03:08 PM
Thanks Steve. That is really disappointing about your LBS. Not fair really... We pay our money for a basic service that we expect to be executed correctly.
SPlash
SoCalSteve
12-03-2016, 04:10 PM
Thanks Steve. That is really disappointing about your LBS. Not fair really... We pay our money for a basic service that we expect to be executed correctly.
SPlash
In the end, I should have realized that having high expectations for service done correctly at a bike store just leaves me disappointed.
I've done 99.9% of the work, building servicing, etc on my bikes for many years now. I've invested lots of $$$ on bike tools and mostly enjoy doing the work myself.
Building wheels, servicing hubs ( save DT Swiss which I can service myself ) I leave up to the bike store. Sometimes they get it right. Sometimes...:no:
Ralph
12-03-2016, 05:21 PM
You all are assuming the average part time mechanic who usually just works on Shimano or SRAM stuff has any understanding of CK hubs.
Not so long ago.....I gave some thought to working part time at one of the large bike shops around here. Mainly to have something to do. Thought it w/b fun. A retired stock broker, etc....finally doing some work for fun!
It was not fun. Spent most of my time putting together beach cruisers, repairing cheap dept store bikes, fixing flats, adjusting gears and brakes on bikes that needed a complete overall....so it was near impossible to make them work right. Never really saw a hi end bike there for work at my work station. So I quit after a couple days.
Maybe at some bike shops the work is glamorous, but that's not what I saw. So I'm not surprised they ignored a set of CK hubs. Probably never seen a pair before.
Having said this......there is usually at least one shop mechanic (or two) around every shop that knows his stuff.
SoCalSteve
12-03-2016, 05:52 PM
You all are assuming the average part time mechanic who usually just works on Shimano or SRAM stuff has any understanding of CK hubs.
Not so long ago.....I gave some thought to working part time at one of the large bike shops around here. Mainly to have something to do. Thought it w/b fun. A retired stock broker, etc....finally doing some work for fun!
It was not fun. Spent most of my time putting together beach cruisers, repairing cheap dept store bikes, fixing flats, adjusting gears and brakes on bikes that needed a complete overall....so it was near impossible to make them work right. Never really saw a hi end bike there for work at my work station. So I quit after a couple days.
Maybe at some bike shops the work is glamorous, but that's not what I saw. So I'm not surprised they ignored a set of CK hubs. Probably never seen a pair before.
Having said this......there is usually at least one shop mechanic (or two) around every shop that knows his stuff.
Actually, this was a high end bike store in Santa Monica that sells Moots, Parlee, etc and the gentleman who did the work was the owner. He has been around the LA area ( in two different locations) for as long as I can remember.
He charged me $45.00 to service the hubs ( not even sure he did anything with the front hub ). I would not have felt ripped off if he had done the work correctly. I shouldn't even say correctly, more like just attention to detail and completion of the task at hand. And then to blame his lack of attention to detail on Chris King products not having great tolerances ( his words, not mine ) is inexcusable.
Again, my faith in bike stores and their mechanics is pretty much shot.
regularguy412
12-03-2016, 08:29 PM
You all are assuming the average part time mechanic who usually just works on Shimano or SRAM stuff has any understanding of CK hubs.
Not so long ago.....I gave some thought to working part time at one of the large bike shops around here. Mainly to have something to do. Thought it w/b fun. A retired stock broker, etc....finally doing some work for fun!
It was not fun. Spent most of my time putting together beach cruisers, repairing cheap dept store bikes, fixing flats, adjusting gears and brakes on bikes that needed a complete overall....so it was near impossible to make them work right. Never really saw a hi end bike there for work at my work station. So I quit after a couple days.
Maybe at some bike shops the work is glamorous, but that's not what I saw. So I'm not surprised they ignored a set of CK hubs. Probably never seen a pair before.
Having said this......there is usually at least one shop mechanic (or two) around every shop that knows his stuff.
^^This.
I volunteered at my LBS for a couple months late one summer. They had lost a mechanic and needed kids bikes and hybrids put together for the Fall holiday period. I did build up some pretty nice Spec and Trek higher-end bikes. Those went together FAR easier and more precise. Pretty amazing what comes out on hybrid cruisers that passes for groupos. Darn near impossible to get adjusted 'just' right (I mean brakes and shifting).
I can see why it would be difficult to keep a couple of really good mechs around.
Mike in AR:beer:
moobikes
12-03-2016, 08:54 PM
Compared to other hubs with adjustable preload, CK R45 hubs are not the easiest to work on. The bearing balls are quite small and there is a fine line between too tight and too loose. The number of bearings in the rear hub, 2 in the hub shell and 2 in the driveshell, also make it harder to achieve good adjustment.
Even a mechanic with experience working on them will need a bit of time to adjust them properly. The final adjustment for the rear hub should be done with the wheel clamped in the frame, and checked for play at the rim. The adjusting collar should be just tight enough to remove all rim movement and no tighter. After a few rides, there's often a need to fine tune preload as the bearings settle in.
And this process has to be performed every time the rear hub is opened for a clean and lube.
estilley
12-03-2016, 11:12 PM
Compared to other hubs with adjustable preload, CK R45 hubs are not the easiest to work on. The bearing balls are quite small and there is a fine line between too tight and too loose. The number of bearings in the rear hub, 2 in the hub shell and 2 in the driveshell, also make it harder to achieve good adjustment.
Even a mechanic with experience working on them will need a bit of time to adjust them properly. The final adjustment for the rear hub should be done with the wheel clamped in the frame, and checked for play at the rim. The adjusting collar should be just tight enough to remove all rim movement and no tighter. After a few rides, there's often a need to fine tune preload as the bearings settle in.
And this process has to be performed every time the rear hub is opened for a clean and lube.
Did this today with my CK classics.
Start loose-ish. Put wheel on bike. Tighten skewer. Check for play. If play is present, remove wheel. Unthread axle cap. Tighten bearings. Re-tighten axle cap. Repeat steps 2-8 until satisfactory.
Sent from my iPhone using Tapatalk
oldpotatoe
12-04-2016, 05:30 AM
Compared to other hubs with adjustable preload, CK R45 hubs are not the easiest to work on. The bearing balls are quite small and there is a fine line between too tight and too loose. The number of bearings in the rear hub, 2 in the hub shell and 2 in the driveshell, also make it harder to achieve good adjustment.
Even a mechanic with experience working on them will need a bit of time to adjust them properly. The final adjustment for the rear hub should be done with the wheel clamped in the frame, and checked for play at the rim. The adjusting collar should be just tight enough to remove all rim movement and no tighter. After a few rides, there's often a need to fine tune preload as the bearings settle in.
And this process has to be performed every time the rear hub is opened for a clean and lube.
Yup, and w/o this becoming a CK hub bash, CK a very complicated answer to a simple question..bicycle hub. DT, WI, shimano, Campag, even Miche, others way more simple, every bit as good, IMHO, of course.
moobikes
12-04-2016, 09:31 AM
The saving grace of CK hubs is the ultra durable bearings that will not die even if treated with very little care. At least, that was the case when they made only the Classics and in smaller batches. These days with so many SKUs I wonder if they have gone cheaper on some materials.
I also find the driveshell engagement to be very solid and flex-free, more so than other higher end hubs I've used.
The R45 driveshell has a built-in spring that is absent in the Classic driveshell. The built-in spring is supposed to help with holding preload at a good level but it complicates adjustment. And this spring is the reason so many R45 hub users find the rear hub bearing loose after some use, because the initial adjustment did not give the spring any load to push against.
So, to original poster, The CK hubs are good hubs but need more care. It's good to know how to work on them so you can check your mechanic's work.
And to pre-empt any comments about CK hubs needing any special tools, all the steps described require only common allen wrenches and your fingers.
Splash
12-04-2016, 11:57 AM
thanks Moo bikes
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