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Mavic freehub issue?
Had an interesting experience scooting down Duck Holes today. There was this huge buzzing noise like i had a stick or leaf or something caught in my back suspension and it was rubbing on the tyre, so I stopped to pull offending item out. Nothing there. Happened a few more times, including one time when I couldn't hear it due to wind noise, but could feel it through the frame.
Seems it happens only when I hit maybe 40km/hr, and stops when I start pedalling or drop below the critical speed, but the hub otherwise behaves normally. Pulled the wheel out when I got home and checked it out, and bearings etc seem smooth still, and there was nothng caught up in there. No rubbing marks anywhere on the frame either - thank heavens.
So I'm thinking freehub may need an overhaul. The wheelset is Mavic CrossMax SLR
Does anyone know a good place where replacement pawls, bushes, maybe bearings etc can be bought at a reasonable price?
Other ideas on what the issue might be?
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hub axle done & it was not cheap Hawkeye $160.00 the axle & labour so hope it is not that ,just your bushes
I had Mavics for a few years and had to get them serviced often. I used to develop a grinding sound that was at it's worst when I was going downhill and backpedalled. I have some industry mates who basically said it's a Mavic thing and you just need to service them regularly. I had 2 sets and it happened on both. I think they only cleaned & re greased them each time as the service wasn't pricey. Read the latest MBA mag as it has a 'how to' on mavic hubs.
I tend to be a DIY guy for most things, hence why I'm after the parts so I can give it a go.
take the freehub off and grease(with a lightish grease) the rubber that seals the hub and the freehub. its common issue and with regular maintenance is avoided( i got mine sorted by a very nice man today!) normally do it myself but have been a bit busy lateley!
Having paid $140 odd to have someone fix a shimano deore hub on a 117 wheel and then realise for around the same money I could have got a custom NEW wheel XC717 and XT Hub from our good friends CRC for $140. I know which way I will go in the future.
Had the same problem on my mavics last week, took it to LBS just needed a bit of grease all sorted.
have a nylon (???) bushing rather than a bearing - it saves weight apparently which looks good on paper
the bushing will wear with time - servicing as suggested above will likely increase the life span of the piece but if it is too far gone you will need to replace
now surprise surprise surprise, mavic will sell you the replacement bushing (unique to mavic if you can believe it) - you just need your own barrel to bend over when you pass over the cash
OR
a mate of mine found a gent in the US i believe that machines his own and sells over the interweb - its been going strong in said mates wheel for this year's dirtworks and training - I'll see if I can track down the fabricators details
I had this same problem with my Crossmax SLRs some time ago.
When this happens whilst coasting, another symptom you'll see is the rear cassette rotating forwards of its own accord, causing the top of the chain to go totally slack.
To fix this, you need to replace the nylon bushing inside the hub.
"Bike WCM" in the USA sells these on his eBay store, and installation is straighforward
http://bikewcm.com/
http://stores.ebay.co.uk/BikeWCM
http://forums.mtbr.com/showthread.php?t=498668
Saved my mind, I tell ya...
what he said
never realised his tag was dogsputnik
After some time away and now living in Melbourne
, I feel the need to chime in on this one as Mavic freehub is my specialty, having serviced mine for 3 years and over 7000km and still no need to change anything.
John, this noise does not spell the end of your freehub, check if you have side to side play in your cassette and if not you only need to lube it with mineral oil (Mavic's is almost impossible to find, but Pedro's Road Rage works perfectly). DO NOT use grease on it.
The procedure takes less then 10 minutes and no special tools are needed. It's good to do this every 6 months or more frequently depending on how much and on what conditions you ride.
If you get the side to side play, you can get replacement bushings from eBay (normal size or even one that is tighter for worn out hubs) and they are cheap. There is also a guy selling bearings to replace the bushing and it seems to work just fine.
If you need any tips on doing this maintenance just let me know.
Cheers,
Leo.
PS: I'm so glad I'm back in Oz.
I'll should look into this as the one on my Giant has play in it although its been there from new.
Leo, welcome back.
Cheers
Brian
Apparently DIYMTB has replacement Mavic freehub bushes for about $20 according to the latest issue of Mountain Biking Australia, including some with .03mm and .05mm tighter clearance for worn hubs.
I'll give it a clean and lube first and then if no improvement try a new bush.
Not knowing what a new one feels like, there was just a barely detectable amount of play in the freehub when I tried to twist it side to side.
I put one of these on about a year ago and I've had good results:
http://cgi.ebay.com/NEW-HUBDOCTOR-PRO-MAVIC-FREE...
It replaces the bushing with a ceramic bearing. I got pawls through him as well and rebuilt the lot at once.
will be looking that way too ntj I got mine done with the nylon bush & there is play in it still
If you do, take your time with the install when it comes to sanding the hub. The kit gives you sandpaper to make the hub body the matching size of the bearing as it is tighter than the nylon bush it replaces - put the freehub on and off frequently as you do it as you go so you don't sand it too much and make it permanently loose.
Once you've got it right, I can't see anything that would give you grief with those hubs again, mine goes nicely.
I'm going to whip the cassette body off and lube it first and see what that does, as I expect it hasn't been serviced at all since purchase (second hand buy).
I'm going to be belting the 29er singlespeed around for most of the weekend I suspect (sorry about the pun
) so I can afford to take a little bit of time to do it right.
Thanks for the tips. I was getting the same problem during the Capital Punishment mud fest.
I've now ordered two bushings for $25 AUD delivered. I like cheap fixes