bunnyhopper Posted May 16, 2011 Report Share Posted May 16, 2011 Hello All, What would be the recommended sprocket sizes for a TXT PRO 200. The bike is new to me and I would like to replace the chain and sprockets as they are warn. Bike is currently running a 9 on the front and 42 on the rear. Information on this would be much appreciated. Thank you in advance. Quote Link to comment Share on other sites More sharing options...
gronno Posted May 16, 2011 Report Share Posted May 16, 2011 Hello All, What would be the recommended sprocket sizes for a TXT PRO 200. The bike is new to me and I would like to replace the chain and sprockets as they are warn. Bike is currently running a 9 on the front and 42 on the rear. Information on this would be much appreciated. Thank you in advance. 10/42 standard, but a lot of 200 riders seem to prefer the 9/42 option, your choice really, I'd go for the 9/42 myself. Quote Link to comment Share on other sites More sharing options...
bunnyhopper Posted May 17, 2011 Author Report Share Posted May 17, 2011 Hi Gronno, Thanks for your speedy reply. Is there any benefit of having the 9 on the front rather than the standard 10? Quote Link to comment Share on other sites More sharing options...
urbanassult Posted May 21, 2011 Report Share Posted May 21, 2011 Dropping one tooth in the front is about equal to goIng up 2.5 in the rear. Quote Link to comment Share on other sites More sharing options...
bunnyhopper Posted May 22, 2011 Author Report Share Posted May 22, 2011 Thanks for the reply Urbanassult. Quote Link to comment Share on other sites More sharing options...
urbanassult Posted May 22, 2011 Report Share Posted May 22, 2011 No problem that's going off memory. I'm new to trials but not bikes that for sure. I have always added teeth to the rear because the angle if the chain might chew up chain sliders if you go too low in the front. Follow?? Just my opinion Quote Link to comment Share on other sites More sharing options...
bigfoot Posted May 23, 2011 Report Share Posted May 23, 2011 Dropping one tooth in the front is about equal to goIng up 2.5 in the rear. Maybe I've been wrong all my life but I thought it was a simple ratio. If you have 10 on the front and 42 on the rear the ratio is 1:4.2 so going down one tooth on the front would be equal to 4.2 up on the back. Quote Link to comment Share on other sites More sharing options...
jse Posted May 23, 2011 Report Share Posted May 23, 2011 Maybe I've been wrong all my life but I thought it was a simple ratio. If you have 10 on the front and 42 on the rear the ratio is 1:4.2 so going down one tooth on the front would be equal to 4.2 up on the back. Me too. Except the bit about being wrong all my life, just some of the parts..... Jon Quote Link to comment Share on other sites More sharing options...
urbanassult Posted May 24, 2011 Report Share Posted May 24, 2011 I stand corrected. Bigfoot is correct. I did some reading and that is how you calculate it. Quote Link to comment Share on other sites More sharing options...
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