trialsrider101 Posted July 16, 2010 Report Share Posted July 16, 2010 Ok so I have a freewheel on the rear (18t) and I was wondering if a front freewheel could also be ran at the same time on the crank. i was thinking I would put the 18t on the front and put a different one on the rear i just need some ideas about gearing ect so I could give it a try, i am currently running 22-18 gearing. all comments welcome cheers tom Quote Link to comment Share on other sites More sharing options...
l33th3tr33 Posted July 16, 2010 Report Share Posted July 16, 2010 Been spoken about before, it won't work. Quote Link to comment Share on other sites More sharing options...
trialsrider101 Posted July 16, 2010 Author Report Share Posted July 16, 2010 Been spoken about before, it won't work. Why not ? Just out of interest Quote Link to comment Share on other sites More sharing options...
JT! Posted July 16, 2010 Report Share Posted July 16, 2010 (edited) If you're talking about a mod (20"), are you sure you don't have a 24/18 setup? Either way, that's pretty low geared - even for a trials bike. Having two freewheels isn't ever recommended, however you can get a perfectly functioning drive by using two freewheels providing one is glued so it can no longer spin. If you don't do that, you may find that when you goto do something like a pedal kick, one freewheel has to engage, and then the other making it feel like your engagement points are virtually non existent. But the main problem to this is that they don't make freewheels small enough. If you were to put a freewheel on the rear (and have your 18t freewheel on the cranks) you'd have to find a 12t-14t freehweel which i don't think exist. However, if you put your 18 tooth freewheel on the cranks, you can simply buy a 12t fixed cog and screw that onto the rear hub. This is the system the majority of mod trials riders use. Or, you could buy a 16t freewheel for the rear and this would make your gear ratio a little bit more towards the norm. Edited July 16, 2010 by JT! Quote Link to comment Share on other sites More sharing options...
trialsrider101 Posted July 16, 2010 Author Report Share Posted July 16, 2010 If you're talking about a mod (20"), are you sure you don't have a 24/18 setup? Either way, that's pretty low geared - even for a trials bike. No my gearing is definatley 22-18 yes it is a mod, I do have a 14 tooth freewheel at home so i know they exist, but if it cant be done well I will just have to find something else to do because the high winds and rain are putting me off riding today. cheers for the reply . Quote Link to comment Share on other sites More sharing options...
Muel Posted July 16, 2010 Report Share Posted July 16, 2010 It does work, andf it's been done, but it's not ideal. It essentially halves your engagement points, because you have to take up the slack and engage one freewheel, then take up more slack and engage the second freewheel. (Roughly, obviously some engagements will take longer crank arm travel than others). For a "keep me riding" fix it's fine, but if you want to set it up properly, you'd be better off with a 12t rear sprocket and an 18t front freewheel. Quote Link to comment Share on other sites More sharing options...
JT! Posted July 16, 2010 Report Share Posted July 16, 2010 No my gearing is definatley 22-18 yes it is a mod, I do have a 14 tooth freewheel at home so i know they exist, but if it cant be done well I will just have to find something else to do because the high winds and rain are putting me off riding today. cheers for the reply . So why can't you just put the 18t freewheel on the cranks and buy a 12t sprocket for the rear? Or are you just wanting to get riding today? What's wrong with you gearing now? Quote Link to comment Share on other sites More sharing options...
trialsrider101 Posted July 16, 2010 Author Report Share Posted July 16, 2010 So why can't you just put the 18t freewheel on the cranks and buy a 12t sprocket for the rear? Or are you just wanting to get riding today? What's wrong with you gearing now? Because I dont get paid till friday and my front chainring has snapped, it was just to keep me riding but with the weather as it is I dont think ill bother. cheers anyway guys. Quote Link to comment Share on other sites More sharing options...
JT! Posted July 16, 2010 Report Share Posted July 16, 2010 Well your (presumably) bolt on chain ring has snapped you don't be able to put a freewheel on the cranks unless you get new cranks. Quote Link to comment Share on other sites More sharing options...
Captain Scarlet Posted July 16, 2010 Report Share Posted July 16, 2010 It does work, at least freewheel on cranks and cassette hub. Matt Bird used to run a Tensile freewheel on cranks and a King bmx hub rear, it produced no problems whatsoever. Quote Link to comment Share on other sites More sharing options...
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