eddie_lejeune Posted March 18, 2014 Report Share Posted March 18, 2014 How can a sprocket with less machining than ever before cost more than ever before, http://www.trialsuk.co.uk/products/jitsie-recessed-enclosed-rear-sprocket Utter nonsense. Quote Link to comment Share on other sites More sharing options...
eddie_lejeune Posted March 18, 2014 Author Report Share Posted March 18, 2014 machined for strength, how many failures have there been unbelievable!! Quote Link to comment Share on other sites More sharing options...
nelly1 Posted March 18, 2014 Report Share Posted March 18, 2014 look at the bright side it will be worth more in scrap value when your finished with it 2 Quote Link to comment Share on other sites More sharing options...
breagh Posted March 18, 2014 Report Share Posted March 18, 2014 Is it quite common for folk to lose there digits in the open sprockets? Never heard of it happening? Quote Link to comment Share on other sites More sharing options...
lineaway Posted March 18, 2014 Report Share Posted March 18, 2014 We`ve come full circle once again with design change. Could also be with the new weight limits it is now not necessary to cut every gram, even at the cost of performance. I`ve only seen one hand in the sprocket in over 40 years. People that are worried about people being injured should talk about proper catching of the bike. Front tire, front forks or handlebars is the only place to grab a bike. Quote Link to comment Share on other sites More sharing options...
baldilocks Posted March 18, 2014 Report Share Posted March 18, 2014 I know of three in all happened when the rider fell off and just became entangled in the bike. Things happen so fast when a bike goes out of control. Quote Link to comment Share on other sites More sharing options...
baldilocks Posted March 18, 2014 Report Share Posted March 18, 2014 Ps your right about the price though 1 Quote Link to comment Share on other sites More sharing options...
garrym Posted March 18, 2014 Report Share Posted March 18, 2014 the wheels will still have spokes and the sprocket will still have sharp teeth, so I don't buy the safety aspect, and were the sprockets not strong enough before? I've never known one crumble. Quote Link to comment Share on other sites More sharing options...
lineaway Posted March 18, 2014 Report Share Posted March 18, 2014 , and were the sprockets not strong enough before? I've never known one crumble. You must ride in no rocks, modern sprockets bend easily. Quote Link to comment Share on other sites More sharing options...
cascao Posted March 18, 2014 Report Share Posted March 18, 2014 (edited) For sure, machined sprocket is more expensive than others simply cut on large press. Edited March 18, 2014 by cascao Quote Link to comment Share on other sites More sharing options...
ken_hosking Posted March 19, 2014 Report Share Posted March 19, 2014 Cascao is correct. Removing material by stamping is a far easier and cheaper process than machining a recess, with tolerances that are suitable for anodising. Quote Link to comment Share on other sites More sharing options...
eddie_lejeune Posted March 19, 2014 Author Report Share Posted March 19, 2014 You must ride in no rocks, modern sprockets bend easily. You must be hitting the sprocket off the rocks at 3omph to bend them For sure, machined sprocket is more expensive than others simply cut on large press. plenty of other cnc machined sprockets out there that would take longer to machine than that which are cheaper Cascao is correct. Removing material by stamping is a far easier and cheaper process than machining a recess, with tolerances that are suitable for anodising. tolerance doesn't effect anodising, surface finish does which in this case is irrelevant Quote Link to comment Share on other sites More sharing options...
guys Posted March 19, 2014 Report Share Posted March 19, 2014 The fact still remains that stamping a hole is a lot faster and cheaper than milling a recess Quote Link to comment Share on other sites More sharing options...
eddie_lejeune Posted March 19, 2014 Author Report Share Posted March 19, 2014 The fact still remains that stamping a hole is a lot faster and cheaper than milling a recess as said previously, other cnc'd sprockets with the pockets right through are cheaper Quote Link to comment Share on other sites More sharing options...
greeni Posted March 20, 2014 Report Share Posted March 20, 2014 I can't believe how cheap riding trials and associated parts are.... see this !!! http://www.chainreactioncycles.com/shimano-dura-ace-fc7900-chainring/rp-prod38160 Quote Link to comment Share on other sites More sharing options...
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