zoo python luke Posted February 23, 2010 Report Share Posted February 23, 2010 hey guys, just wanted to know if it matters on the size of the disc, is bigger better,,? or what? thanks Quote Link to comment Share on other sites More sharing options...
Alex Dark Posted February 23, 2010 Report Share Posted February 23, 2010 hey guys, just wanted to know if it matters on the size of the disc, is bigger better,,? or what? thanks Bigger rotor...more leverage round hub, more bite and hold. Smaller rotor...the opposite Quote Link to comment Share on other sites More sharing options...
zoo python luke Posted February 23, 2010 Author Report Share Posted February 23, 2010 Bigger rotor...more leverage round hub, more bite and hold. Smaller rotor...the opposite ohh, thanks Quote Link to comment Share on other sites More sharing options...
a.rig123 Posted February 24, 2010 Report Share Posted February 24, 2010 i would say biggers better but pad and a nice straight rotor help i run a 160 instead off 180 Quote Link to comment Share on other sites More sharing options...
LukasMcNeal Posted February 24, 2010 Report Share Posted February 24, 2010 Also another thing to think about is the bigger the disc the more chance of hitting it. Quote Link to comment Share on other sites More sharing options...
jordan allsop Posted February 25, 2010 Report Share Posted February 25, 2010 I ridie with a 180mm disc brake and it hold very good. I used to have a 160mm disc brake that was good but not as good as a 180mm disc brake. Bigger the disc beter the bit and grip. I would advise a hope Mono disc brake you can get them of tartybikes they or £150 hope i helped Quote Link to comment Share on other sites More sharing options...
jiri Posted February 26, 2010 Report Share Posted February 26, 2010 "Bigger rotor...more leverage round hub, more bite and hold. Smaller rotor...the opposite" Bigger rotor gives you only more leverage. Bite and hold is given by the size of surface where pads touches the rotor. Some rotors are made to fit exactly the size of pads and in some cases the contact surface of 160s is bigger than 180s used with inapropriate brake. It depends. For example if you run Avid rotor with Hope mono trial you won´t get the best of it because the surface of pads is larger then rotor. The same if you run Hope trial rotor with Avid brake, but in this case pads won´t cover all the surface of rotor. Good drilling is also importat because it helps to mantain braking power by cleaning the pads. What matters the most is of course the brake itself. Good disc brake is efficient even with the poor rotor. I use Hope mono mini on both wheels and it´s great. Now I am trying them filled with water. Not to improve a lever feel, because Hopes work perfectly, but to reduce micro-leaking which gradually attracts dirt and decreases braking performance. Quote Link to comment Share on other sites More sharing options...
TRIALS EVO 2 Posted February 28, 2010 Report Share Posted February 28, 2010 Just a quote from a website. "Larger discs produce a more powerful braking system. Discs in general can be heavy as they are made from steel compounds so weight is the downside of large disc brake rotors. You may have noticed holes in some discs used for lightness, cooling, and self cleaning of dirt. More holes reduces stopping power. Disc brake rotors go from 130 to 205 in diameter (side to side). Downhill bikers usually have larger discs as you'd expect with more rugged riding conditions. Cross country boys will use something like a 160 mm disc on the front and general riders will choose something in the middle - a compromise between the two. Front discs tend to be larger than rear discs as a rule. Remember that discs with no holes at all means more dirt on the disc surface so watch out - perhaps you want to ask your bike shop or some experienced ATB riders what kind of disc brake rotors they use. " Quote Link to comment Share on other sites More sharing options...
6ft-midget Posted February 28, 2010 Report Share Posted February 28, 2010 "Bigger rotor...more leverage round hub, more bite and hold. Smaller rotor...the opposite" Bigger rotor gives you only more leverage. Bite and hold is given by the size of surface where pads touches the rotor. Some rotors are made to fit exactly the size of pads and in some cases the contact surface of 160s is bigger than 180s used with inapropriate brake. It depends. For example if you run Avid rotor with Hope mono trial you won´t get the best of it because the surface of pads is larger then rotor. The same if you run Hope trial rotor with Avid brake, but in this case pads won´t cover all the surface of rotor. Good drilling is also importat because it helps to mantain braking power by cleaning the pads. What matters the most is of course the brake itself. Good disc brake is efficient even with the poor rotor. I use Hope mono mini on both wheels and it´s great. Now I am trying them filled with water. Not to improve a lever feel, because Hopes work perfectly, but to reduce micro-leaking which gradually attracts dirt and decreases braking performance. Are you saying that you've bled your disc brake with water? If so that's not the greatest of ideas to be honest. Quote Link to comment Share on other sites More sharing options...
jiri Posted February 28, 2010 Report Share Posted February 28, 2010 Have you got any personal experience with that? I admit, that using water in discs might cause problems when overheated but on the other side, this is not case of trials riding. Anyway, I wouldn´t recomend using water in discs to anyone who is happy with oil. I just wanted to show that there is also an alternative. Good setting of brakes is in the first place of course. Quote Link to comment Share on other sites More sharing options...
Alex Dark Posted February 28, 2010 Report Share Posted February 28, 2010 (edited) "Bigger rotor...more leverage round hub, more bite and hold. Smaller rotor...the opposite" Bigger rotor gives you only more leverage. Bite and hold is given by the size of surface where pads touches the rotor. Some rotors are made to fit exactly the size of pads and in some cases the contact surface of 160s is bigger than 180s used with inapropriate brake. It depends. For example if you run Avid rotor with Hope mono trial you won´t get the best of it because the surface of pads is larger then rotor. The same if you run Hope trial rotor with Avid brake, but in this case pads won´t cover all the surface of rotor. Good drilling is also importat because it helps to mantain braking power by cleaning the pads. What matters the most is of course the brake itself. Good disc brake is efficient even with the poor rotor. I use Hope mono mini on both wheels and it´s great. Now I am trying them filled with water. Not to improve a lever feel, because Hopes work perfectly, but to reduce micro-leaking which gradually attracts dirt and decreases braking performance. Has been done before....and it buggers the hell out of the Hope internals. As to that Micro-leaking , water is less viscous, so will tend to leak more surely? Edited February 28, 2010 by Alex Dark Quote Link to comment Share on other sites More sharing options...
6ft-midget Posted February 28, 2010 Report Share Posted February 28, 2010 Have you got any personal experience with that? I admit, that using water in discs might cause problems when overheated but on the other side, this is not case of trials riding. Anyway, I wouldn´t recomend using water in discs to anyone who is happy with oil. I just wanted to show that there is also an alternative. Good setting of brakes is in the first place of course. Nah, never really had the need for it as I've never had to pay for dot4. The main reason i use water in maggies is because its free. Quote Link to comment Share on other sites More sharing options...
jiri Posted February 28, 2010 Report Share Posted February 28, 2010 Has been done before....and it buggers the hell out of the Hope internals. Really? How specifically? As to that Micro-leaking , water is less viscous, so will tend to leak more surely? Good point. I don´t mind water leaking out of the breake, it is harmless. Eco-maniacs love me Thanks for comment. Quote Link to comment Share on other sites More sharing options...
Alex Dark Posted February 28, 2010 Report Share Posted February 28, 2010 Good point. I don´t mind water leaking out of the breake, it is harmless. Eco-maniacs love me Thanks for comment. haha fair play...id bleed my hope with water if it works, so keep us updated Quote Link to comment Share on other sites More sharing options...
jiri Posted February 28, 2010 Report Share Posted February 28, 2010 haha fair play...id bleed my hope with water if it works, so keep us updated If the brakes fall apart, you will be the first one to know Quote Link to comment Share on other sites More sharing options...
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