HippY Posted December 13, 2014 Report Share Posted December 13, 2014 Hey guys I am in need your help All I need to build my bike up, is to remove 2 screw on sprockets from a crank and a wheel... and here is my problem Local Bike shop tried and bent their chainwhip. Last time I installed a screw on sprocket on a cranks they were like " it will be easy to remove it". Should I go there with Tarty vid to give them an idea? I went to a friend with a vice, but it was not a bolt through one. we gave it a go, tried to give it huge power, no movement at all (except chain) is there any other way to remove the sprocket? I do not want to keep them, I just want to keep the threads in good condition. Should I heat up the sprocket? I have a heat gun, good for 300 C. also I can grind it down I have a grinder ( a block of metal basically, so not the quick mechanical ones)... I am not sure what to do Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted December 13, 2014 Report Share Posted December 13, 2014 Tarty video, or new Trialtech tool: http://www.trials-forum.co.uk/topic/155894-new-from-trialtech/?p=2618286Love it when bike shops break chain whips trying to remove sprockets, you can tell them as many times as you like that it won't work but they keep trying! 2 Quote Link to comment Share on other sites More sharing options...
dngr2self Posted December 13, 2014 Report Share Posted December 13, 2014 I made an extra long chain whip with a 1m long piece of steel and an old kool chain. I find spraying them with wd or gt and leaving it about a day helps as well as a bit of heat before you do it. I snapped my old vice doing it before though so be careful. 1 Quote Link to comment Share on other sites More sharing options...
HippY Posted December 13, 2014 Author Report Share Posted December 13, 2014 Tarty video, or new Trialtech tool: http://www.trials-forum.co.uk/topic/155894-new-from-trialtech/?p=2618286 Love it when bike shops break chain whips trying to remove sprockets, you can tell them as many times as you like that it won't work but they keep trying! I watched tarty video many times, before I do any kind of servicing, I take a look there. that sounds interesting, does it require a vice? I made an extra long chain whip with a 1m long piece of steel and an old kool chain. I find spraying them with wd or gt and leaving it about a day helps as well as a bit of heat before you do it. I snapped my old vice doing it before though so be careful. that is a good idea, ill do that! Quote Link to comment Share on other sites More sharing options...
Mark W Posted December 13, 2014 Report Share Posted December 13, 2014 If you mean does the Trialtech tool require a vice - no, you can use it with an extension bar or adjustable spanner on the end of the handle. Or, if you're f**king ripped, just use it as-is... 1 Quote Link to comment Share on other sites More sharing options...
HippY Posted December 13, 2014 Author Report Share Posted December 13, 2014 If you mean does the Trialtech tool require a vice - no, you can use it with an extension bar or adjustable spanner on the end of the handle. Or, if you're f**king ripped, just use it as-is... amazing, next question when it will be available, and I hope it will not cost a fortune.. Quote Link to comment Share on other sites More sharing options...
Mark W Posted December 13, 2014 Report Share Posted December 13, 2014 Some have already been shipped out to Trialtech dealers. I think it's something like £12-13 for the handle and bolts then £11-12 for an adaptor, although that's from memory so quite probably wrong Quote Link to comment Share on other sites More sharing options...
HippY Posted December 14, 2014 Author Report Share Posted December 14, 2014 would it not help if I would put them on my bike and try to pedal backward while puling the brake? Seems like a stupid idea, but might work out. I have fixed sprocket front and back Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted December 14, 2014 Report Share Posted December 14, 2014 Might do, worth a shot, be prepared for a potential chain snap though. Quote Link to comment Share on other sites More sharing options...
HippY Posted December 14, 2014 Author Report Share Posted December 14, 2014 Might do, worth a shot, be prepared for a potential chain snap though. I got a chain a brand new 610HX that I used to try to remove the sprocket with a vice. so i would not use for anything else than removing sprocket. Quote Link to comment Share on other sites More sharing options...
Mark W Posted December 14, 2014 Report Share Posted December 14, 2014 3 Quote Link to comment Share on other sites More sharing options...
Matthew_Gibson Posted December 21, 2014 Report Share Posted December 21, 2014 Are you wanting to keep the sprocket? If not get a dremel and a thin cutting disc. Be very careful. Put a thin cut at 12 o'clock and another at 6 o'clock on the sprocket. But just so your through the sprocket. Then grab a screw driver and place it in one of the slots and twist. should break off in 2 bits, just be very careful. Done it once, but it will be okay if you don't rush it. Quote Link to comment Share on other sites More sharing options...
HippY Posted December 26, 2014 Author Report Share Posted December 26, 2014 Are you wanting to keep the sprocket? If not get a dremel and a thin cutting disc. Be very careful. Put a thin cut at 12 o'clock and another at 6 o'clock on the sprocket. But just so your through the sprocket. Then grab a screw driver and place it in one of the slots and twist. should break off in 2 bits, just be very careful. Done it once, but it will be okay if you don't rush it. I do not intend to keep it I do not have a dremel, but I have other handtools but, We were success with the rear wheel. Went to LBS asked them for the vice, they were like" it is impossible to remove that sprocket" after 5 min it was done. We just need to find a bar for the crank. Quote Link to comment Share on other sites More sharing options...
HippY Posted December 28, 2014 Author Report Share Posted December 28, 2014 quick question regarding cranks: How much does it matter if I mix the cranks? so for example I get a new driver side cranks with no sprocket, as it seems it will take a good while to find someone with the tools to take the cranks off in a short period of time. it would be the 170mm too and wide-ish offset Quote Link to comment Share on other sites More sharing options...
Ash-Kennard Posted December 28, 2014 Report Share Posted December 28, 2014 Get yourself a good vice, two blocks of wood and a large pole. Stick the two blocks of wood in the vice and insert crank arm so the teeth dig into the wood when the vice is wound up. Then take your pole, insert onto the crank arm and gently rotate. Same thing with a wheel but rotate using the rim as a lever. Quote Link to comment Share on other sites More sharing options...
HippY Posted December 29, 2014 Author Report Share Posted December 29, 2014 Get yourself a good vice, two blocks of wood and a large pole. Stick the two blocks of wood in the vice and insert crank arm so the teeth dig into the wood when the vice is wound up. Then take your pole, insert onto the crank arm and gently rotate. Same thing with a wheel but rotate using the rim as a lever. We cannot find a pole, that is our problem Quote Link to comment Share on other sites More sharing options...
dngr2self Posted December 29, 2014 Report Share Posted December 29, 2014 Another way is a long bolt through the bolt hole. I used an 8 inch coach bolt but it only needs to be about 4, it needs to be about 10mm thick though. Then put an old pedal on. You can then use a metal bar between the bolt and pedal. I used a 2 foot crow bar and this method when I couldn't find something to slide over the crank. Quote Link to comment Share on other sites More sharing options...
bing Posted December 29, 2014 Report Share Posted December 29, 2014 We cannot find a pole, that is our problem Go nick a scaffold pole and saw it up. No dramas 1 Quote Link to comment Share on other sites More sharing options...
Ash-Kennard Posted December 29, 2014 Report Share Posted December 29, 2014 Go nick a scaffold pole and saw it up. No dramas Quote Link to comment Share on other sites More sharing options...
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