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Hi,
I don't know if the title describes the problem correctly.
I have read this: [url= http://www.singletrackworld.com/forum/topic/clonking-under-heavly-pedal-load-driving-me-crazy ]Skipping Chain[/url] and my problem seems to be very similar.
I have noticed that my cassette does have quite a lot of lateral play on the hub. possibly 2mm or so. Is this acceptable? It seems to me that 2mm is a substantial amount compared to a chain width.
TIA
Andrew
1) the cassette shouldn't move/rock at all.
2) are you sure it's not the whole freehub moving rather than the cassette on its own?
tighten it up ?
you'll need one of these :
[img] http://www.saddlesafari.co.uk/shop/media/gbu0/prodsm/CassetteToolSmall.jp g" target="_blank">http://www.saddlesafari.co.uk/shop/media/gbu0/prodsm/CassetteToolSmall.jp g"/> [/img]
like this >
[img] http://www.bikemojo.com/zine/images/uploads/driveclean01.jp g" target="_blank">http://www.bikemojo.com/zine/images/uploads/driveclean01.jp g"/> [/img]
Kev
2mm play at the big cog in not unheard of for shimano freehubs at least.
How old is the chain/cassette? Could be wear.
Can't be sure if whole hub is moving. Looks like cassette only.
Chain is brand new.
Entire wheel is a Mavic Crossmax ST
The cassette also rotates (clockwise and then back) a bit when the chain bounces up and down (a la chain slap). Is this normal? I only noticed it on the new bike (pre-used drivetrain, except chain which is new).
are you using the mavic 'we made the freehub too wide' spacer with the cassette?
The cassette also rotates (clockwise and then back) a bit when the chain bounces up and down (a la chain slap). Is this normal? I only noticed it on the new bike (pre-used drivetrain, except chain which is new).
When freewheeling? Yes.
Probably the usual wear in the nylon bush inside the freehub. Another sympton is freewheel "howling" at speed....
Its a simple fix, 30 mins. Get a kit from ebay and DIY, save some cash.
[url= http://shop.ebay.co.uk/i.html?_nkw=mavic+freehub&_sacat=0&_odkw=mavic+hub+service&_osacat=0&bkBtn=&_trksid=p3286.m270.l1313 ]clicky[/url]
There are videos on how to do this from facetube. Search for Rogue Mechanic
If you buy a kit from the States, I just got caught for £13 tax.. but its still cheaper.
HTH Rick
Thanks for all the replies.
I took it to my LBS and he agreed that it wasn't right. He inspected the hub for play and it was fine.
He added some spacers from a 10 spreed road cassette. This reduced the wobble but didn't eliminate it. Tried a new cassette. No improvement.
As I was rushing off for the weekend I took the wheel with my old cassette and the spacers. The first time I tried to pedal it jumped all over, but it was soon fixed with a few turns on the barrel. Rode the bike hard over the weekend without any problems. 😀
Also, after I mentioned the Mavic extra-wide hub feature, he had a look in the Mavic catalogue and found a spacer that fits the grooves on the hub so hopefully, even the remaining wobble will be eliminated.
Cheers,
Andrew