Alex Dark Posted February 28, 2008 Report Share Posted February 28, 2008 shit, man...that looks bad, looks like the bearing race inside the Freewheel isnt in the right place! Quote Link to comment Share on other sites More sharing options...
rudirudirudirudirudi Posted February 28, 2008 Author Report Share Posted February 28, 2008 just went down to the local bike shop and apparently its just a sort of freak freewheel. they all do it to some degree just some are just randomly worse than others.... something to do with it not quite being centered... nothing i can do to be honest........ dont think tarty will take it back so ill just use it. Quote Link to comment Share on other sites More sharing options...
Al_Fel Posted February 28, 2008 Report Share Posted February 28, 2008 does if effect your riding? if not I wouldn't worrie about it. Quote Link to comment Share on other sites More sharing options...
Ladd Posted February 28, 2008 Report Share Posted February 28, 2008 how come mine doesnt do it? i have the same freewheel as you? Quote Link to comment Share on other sites More sharing options...
rudirudirudirudirudi Posted February 28, 2008 Author Report Share Posted February 28, 2008 its just a fact of some freewheels are worse than others. simple as that i guess. nah, it seems ok. chain doesnt come off or anything. dono if a real slack chain affects riding really. Quote Link to comment Share on other sites More sharing options...
mike Posted February 28, 2008 Report Share Posted February 28, 2008 the thing to do would be to slack the chain right off and get a tensioner on there, (one thats not fixed (like the homemade hacksaw blade ones)) then it'll stay the same tension all the time. Quote Link to comment Share on other sites More sharing options...
Matthew_Gibson Posted February 28, 2008 Report Share Posted February 28, 2008 That looks pretty bad. The vibe360 which we sell at halfords move about that much MINIMUM seel the move double! Quote Link to comment Share on other sites More sharing options...
Mike Poyzer @ Onza Posted February 28, 2008 Report Share Posted February 28, 2008 The problem is probably down to maintaining concentricity between the internal thread of the freewheel body, its bearing surface, the bearings, the bearing surface of the ratchet ring and the machining of the teeth. Only slight variance of any of these factors is enough to cause the problem. With a generic product like this we have often found it difficult to stay on top of quality control as you have not had any real input into the manufacturing process. The Tensile on the other hand is entirely ours and we lay down its tolerances. We also make sure that both inner and outer rings are machined concentrically. This is not to say that it will always run concentrically as that is also down to the concentricity of your crank thread to bottom bracket axle to bottom bracket cups and bearings. Thats a lot of scope for variance. Quote Link to comment Share on other sites More sharing options...
PaRtZ Posted February 28, 2008 Report Share Posted February 28, 2008 I have never seen a freewheel that DOESN'T do that "bobbing" Until I read mikes post ^^ I never knew why it was, I just accepted it.I really wouldn't worry about it though. Quote Link to comment Share on other sites More sharing options...
liam-pantera Posted February 28, 2008 Report Share Posted February 28, 2008 as evryone has said its normal infact my cousin bought one 2 weeks ago and its ovalised allready and has worse tension than yours Quote Link to comment Share on other sites More sharing options...
rudirudirudirudirudi Posted February 28, 2008 Author Report Share Posted February 28, 2008 i new that freewheels did it a bit. just not this much....... now that i have been to the bike shop i know for sure its just the freewheel. i was worrying about having to buy another frame when iv only had this one for a bit. thanks for all your help guys.... no more freewheels for me. had enough of them...... im going to go profile. cheers. x Quote Link to comment Share on other sites More sharing options...
Greetings Posted February 28, 2008 Report Share Posted February 28, 2008 how come mine doesnt do it? i have the same freewheel as you?There are so many variables you can't really say. Firstly, you've got to consider the quality of the cranks, ISIS spline, bb trueness.For instance, I've been using an Onza 18T sprocket for about 3 years on about 5 different cranks. Every time I change my cranks or bb, the chain tensions in a different place, and gets loose in another. The freewheel is another problem. Recently, Monty have started welding up their freewheels. Ever since, the freewheels have stopped turning smoothly. Some are ok but the majority aren't which suggests that the chainring itself isn't perfectly round. Maybe I've just got a bad batch, but the quality seems to be dropping. One customer actually received a freewheel with a cut through sidewall so the bearing was exposed from the inside. I'll take some proper pictures of that when it's returned to me. Quote Link to comment Share on other sites More sharing options...
JonMack Posted February 29, 2008 Report Share Posted February 29, 2008 That happens on my Megamo with my fixed cog, and because the chain is so long, when it's at it's loosest (d/s crank facing forward) it hits the c/stay, but with the nd/s crank facing forward it's at perfect tension. I've just got used to it really. Quote Link to comment Share on other sites More sharing options...
monkeyseemonkeydo Posted February 29, 2008 Report Share Posted February 29, 2008 I've never had a freewheel that doesn't do this to some degree... my current ENO on Echo forged set up does it worse than any I've ever had... ah well! Quote Link to comment Share on other sites More sharing options...
Mike Poyzer @ Onza Posted February 29, 2008 Report Share Posted February 29, 2008 I'm afraid the problem doesn't go away by changing to a freehub, whether Profile or anything else. Go and lift the average mountain bike or road bike back wheel off the ground, spin the back wheel without turning the pedals and watch the cassette roll up and down. Quote Link to comment Share on other sites More sharing options...
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