The Drongo Posted January 22, 2011 Posted January 22, 2011 Heart Coppi, sorry to see the rapid change in heart, you went from seems reasonable to the above, in real life they are very nicely finished off, anodized and fit great. The tolerances are spot on and minimal torque is required to tighten them up, if you don't like them, run a gear smaller than 16 or prefer to change gears with a chain whip and cassette tool you could always use plumbing pipe or simple aluminium spacers. They all work. choices, choices..... Not an extrusion boss. These are CNC machined parts. Hence the $$$.Worth EVERY penny I'd say.Less than a 2min gear change!!!
Wyatt Earp Posted January 22, 2011 Posted January 22, 2011 I recon 2 heavy duty cable ties would be lighter cheaper and also do the trick!I would love to see this in practice.
The_Break Posted January 22, 2011 Posted January 22, 2011 I would love to see this in practice. I think the gear is going to break. No offense but it is a really bad idea. There is no support to the flanks of the gear. Compare it to a track gear and you will see how much thinner it is.
Wyatt Earp Posted January 22, 2011 Posted January 22, 2011 I think the gear is going to break. No offense but it is a really bad idea. There is no support to the flanks of the gear. Compare it to a track gear and you will see how much thinner it is.Hence my sarcastic comment.I don't think people realise how much power a strong SS rider can exert.
The_Break Posted January 22, 2011 Posted January 22, 2011 (edited) Hence my sarcastic comment.I don't think people realise how much power a strong SS rider can exert.FWEF. Big sigh!!! Didn't hear that sarcastiv twang in your voice there. I also think there is going to be some free body damage from these guys if the clamping is too high. Will be interesting to see what torque spec they cme out with. Edited January 22, 2011 by The_Break
Zeps Posted January 22, 2011 Posted January 22, 2011 Hence my sarcastic comment.I don't think people realise how much power a strong SS rider can exert. I'll let you know when I've tried it on my fixie
Wyatt Earp Posted January 22, 2011 Posted January 22, 2011 FWEF. Big sigh!!! Didn't hear that sarcastiv twang in your voice there. I also think there is going to be some free body damage from these guys if the clamping is too high. Will be interesting to see what torque spec they cme out with.I am also keen to see the outcome of that.@ Big S, make sure you take a cellphone .
EigerSA Posted January 22, 2011 Posted January 22, 2011 there shouldn't be any side ways flex on the gear at all? if anything the chain and chain stays will flex way before the cog itself, and I think your chain would run off the cog if it flexed wouldn't it? When you fit the these gear clamps you run the cog until it finds the spot it wants to be in, then tighten up the clamps, that would surely prevent any bending or breaking I think.
The_Break Posted January 22, 2011 Posted January 22, 2011 there shouldn't be any side ways flex on the gear at all? if anything the chain and chain stays will flex way before the cog itself, and I think your chain would run off the cog if it flexed wouldn't it? When you fit the these gear clamps you run the cog until it finds the spot it wants to be in, then tighten up the clamps, that would surely prevent any bending or breaking I think. Um, no! Not that easyily said. I am not even going to try explain this one unless youu know your emperical equations.
Zeps Posted January 22, 2011 Posted January 22, 2011 @ Big S, make sure you take a cellphone . I may have been married for 28 years dude but even Deb won't fetch me if I tried something that stoopid
EigerSA Posted January 22, 2011 Posted January 22, 2011 well i've ordered a set, guess i'll find out myself, empirical equation knowledge or not
onetrackmind Posted January 22, 2011 Posted January 22, 2011 The price is awfully unreasonable considering what the process is to manufacture these. If they are aluminium they are simply extruded in lengths and parted of with probably a circular saw.The cost is the extruding die and the MOQ of the extrusion..Next is drill and tap and anodise.Should be cheap.Then Don't Buy Them
The_Break Posted January 22, 2011 Posted January 22, 2011 (edited) well i've ordered a set, guess i'll find out myself, empirical equation knowledge or not Sorry, misunderstood you posting. This design does provide side wall support. My mindset was still on the comment of cable ties. So this design should be good from that perspective. I am still wanting to see how the freehub (especially alu ones) gets damaged, especially on powetap hubs. I believe there will be some damage if tightened too much and also front a single cog which now has all the force acting on it as compared to a whole cluster. Edited January 22, 2011 by The_Break
eggsovereasywithteandtoast Posted January 22, 2011 Posted January 22, 2011 (edited) ^^^^ why do you present this pic?? Edited January 22, 2011 by eggsovereasywithteandtoast
HeartCoppi Posted January 23, 2011 Posted January 23, 2011 Not an extrusion boss. These are CNC machined parts. Hence the $$$.Worth EVERY penny I'd say.Less than a 2min gear change!!! I strongly doubt that these are CNC'd. If these are to be machined in a CNC center it would be difficult to achieve the finishing detail for the inside corners. The side cutter would by default present a radius which is not present in the detailed photographs. Post machining filing would be required for 'squaring' the splines. An inside radius would result in a poor quality of fit on the freehub. Poor fit due to rads (especially on a soft material like aluminium) would see the ring deforming at the splines and most likely 'twist' under load stress. This would permit displacement of the cog and lead to eventual damage of the freehub splines. Secondly the photograph shows clear transverse or perpendicular 'striations' on the outside diameter which are typically evidence of extrusion. The outer diameter is not dressed at all in production and is simply anodised.
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