dantrial Posted July 8, 2011 Report Share Posted July 8, 2011 Hi. I have a couple of questions regarding this topic I am in the fortunate situation that I can have a BMX bike for free. How can I make it more useable for trial? I know the bike has a very heavy gear ratio and that's not good for trial. Can I use the crank of a offroad bike to get a smaller sprocket upfront? Currently I own a cheap offroader with a very high frame which is not very good for trial. It has got Kona downhill handlebars that are very comfortable that I would like to use if possible. Lastly I would like to point out that I'm a beginner when it comes to bikes and trial so please be kind to me Quote Link to comment Share on other sites More sharing options...
bikeperson45 Posted July 8, 2011 Report Share Posted July 8, 2011 I'd stick with the Kona rather then the BMX. I learn on my 19" Specalized for months practicing general hopping, wheel pivots, bunnyhops and wheelies so when I started trials I found the transfer pretty easy.The BMX will be pretty cramped compared to a trials bike so riding the mtb would probably be better, I think. Quote Link to comment Share on other sites More sharing options...
Revolver Posted July 8, 2011 Report Share Posted July 8, 2011 You need a front sprocket of 24 and a rear one of 16, something like that, which is very doable on a BMX. It won't give you much clearance. Then, you need to get a sick brake. If it has a U-brake mount, getting some of the clear inspired v-brake pads will do, and you need a good lever, for both brakes. Finally, you'd need a stem for a mod bike, and handlebars as well. And at the end, you've got a bike that doesn't ride very well for trials. Quote Link to comment Share on other sites More sharing options...
dantrial Posted July 8, 2011 Author Report Share Posted July 8, 2011 so its much better to keep the MTB I have already and improve on that? one problem i have with my MTB is that there is to much slop in the drivetrain. when I roll forward and want to give the pedals a good pump to make the front wheel come up or such it's about 1/8 of a stroke thats wasted picking up the slop. what can be done to fix this? Quote Link to comment Share on other sites More sharing options...
AndrewEH1 Posted July 8, 2011 Report Share Posted July 8, 2011 Either your sprockets and chain are worn out, or you need to take a few links out of your chain. Could also be the tensioner? Quote Link to comment Share on other sites More sharing options...
Revolver Posted July 8, 2011 Report Share Posted July 8, 2011 It's either a slack chain or a shit hub. Quote Link to comment Share on other sites More sharing options...
dantrial Posted July 9, 2011 Author Report Share Posted July 9, 2011 I dont think its the chain. I can see the chain moving in time with me. Im thinking that its the hub. This is not an expensive bike by any means. What can I do to fix this? I have been looking at the tartybikes website but I dont understand half of the stuff there. Is this something that will work? My link Or maybe this? My link I really dont know what fits where and if any of this fits my bike, so if you guys could post some links to things that will work that would help me alot Quote Link to comment Share on other sites More sharing options...
Revolver Posted July 9, 2011 Report Share Posted July 9, 2011 http://www.tartybikes.co.uk/135mm_free_hubs/hope_pro_2_trials/c148p10058.html This is probably what you need. And then this http://www.tartybikes.co.uk/single_speed_kits/atomz_complete_single_speed_kit/c511p10135.html Quote Link to comment Share on other sites More sharing options...
dantrial Posted July 9, 2011 Author Report Share Posted July 9, 2011 so I need the hole hub new. which means I have to build a new rim? is this hard to do? I talked to a guy in a local bike shop today and he said it might be dry inside the mechanism so it doesnt grip properly. He said this was normal on bikes used in the winter and that have been out of use for a while. Quote Link to comment Share on other sites More sharing options...
bobstar4575 Posted July 9, 2011 Report Share Posted July 9, 2011 if u still want to use your bmx just put a bigger freewheel on the back and then the gearing should be right. Quote Link to comment Share on other sites More sharing options...
bikeperson45 Posted July 10, 2011 Report Share Posted July 10, 2011 If I were you I would make the most of what you first and practice on that, and save for a trials bike that's made for the job. Something like an Onza or a Phase would be good for beginners, then you could upgrade parts as you improve around a much more suited frame. Getting a Hope hub for your current bike would be a waste as your spending a lot of money on a bike that will never be suited for trials really. Quote Link to comment Share on other sites More sharing options...
dantrial Posted July 10, 2011 Author Report Share Posted July 10, 2011 If I were you I would make the most of what you first and practice on that, and save for a trials bike that's made for the job. Something like an Onza or a Phase would be good for beginners, then you could upgrade parts as you improve around a much more suited frame. Getting a Hope hub for your current bike would be a waste as your spending a lot of money on a bike that will never be suited for trials really. thats what im gonna do just need to find a way to get rid of the slack in my drivetrain so I can be more accurate in my moves. I also thought that was a bit expensive for a part for this bike. Im currently looking into cheaper solutions. Quote Link to comment Share on other sites More sharing options...
Revolver Posted July 10, 2011 Report Share Posted July 10, 2011 It's expensive, however if you built a complete trials wheel with a quality hub like that, you wouldn't need to upgrade it if you bought a cheaper full build bike. You could buy a phase, for example, and use this hub and it would be excellent from the beginning! Quote Link to comment Share on other sites More sharing options...
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