spartan Posted April 16, 2008 Report Share Posted April 16, 2008 Ok, so i have the blue rock pads with metal backings mounted to my zhi maggie to vee adaptors with sd3 arms and an echo rim with medium grind.Basically i cant get my brakes to feel really solid. Like they feel pretty good and they usually hold but when i still have to apply tar a couple of times per ride to keep preformance up.I was wondering, the zhi adaptors move the brake boss about 1 inch lower so i have to mount the pads very high in the rails on my arms. If i made my own adaptors that put the brake on the bottom magura mount so i could put the pads lower in the rails would this have a significant effect on my braking performance??Thanks for the help,Ian Quote Link to comment Share on other sites More sharing options...
matt rushton Posted April 16, 2008 Report Share Posted April 16, 2008 How about a booster? Quote Link to comment Share on other sites More sharing options...
Ben John-Hynes Posted April 16, 2008 Report Share Posted April 16, 2008 How about a booster?In the words of meatloaf himself...You took the words right out of my mouth. Quote Link to comment Share on other sites More sharing options...
forteh Posted April 16, 2008 Report Share Posted April 16, 2008 I was wondering, the zhi adaptors move the brake boss about 1 inch lower so i have to mount the pads very high in the rails on my arms. If i made my own adaptors that put the brake on the bottom magura mount so i could put the pads lower in the rails would this have a significant effect on my braking performance??Depending on the moment ratios but yes it will make a difference For example: -105mm arm with the pad 25mm from the pivot (bottom of slots) will give 4.2:1 mechanical advantage on the force applied to the rim.105mm arm with the pad 35mm from the pivot (top of the slots) will give 3:1 mechanical advantage on the force applied to the rim.Thats almost 30% more mechanical advantage - the dimensions are guessed but the same principles are applied.If you can manufacture some v-daptors which will increase your mechanical advantage by moving the pads closer to the pivot then it will help, although it will introduce more flex so a booster will probably be in order. Quote Link to comment Share on other sites More sharing options...
psycholist Posted April 16, 2008 Report Share Posted April 16, 2008 The less leverage you have the more solid the brake will feel at the lever and the less clamping force will be produced. If you're after a solid feel at the lever try setting the pads absolutely parallel to the rim (For normal use it's recommended to set the front edge of the pad to touch the rim first to stop them squealing). As the pads wear the brake should feel more solid thanks to there being less pad material to squash as the brakes are applied. To improve brake feel without compromising power try getting a better cable, shortening the cable outer as much as possible and making sure the brake and lever pivots are free from excessive drag and fitting a brake booster. Quote Link to comment Share on other sites More sharing options...
spartan Posted April 16, 2008 Author Report Share Posted April 16, 2008 Ive got the 07 czar frame with a built in booster but i could get another one if i need it.The brakes feel really nice right now they just dont seem to have the bit they should.Basically im getting that moving the pads lower in the arms will make them feel squishyer but i will get more power??.If so im down with that. Quote Link to comment Share on other sites More sharing options...
forteh Posted April 16, 2008 Report Share Posted April 16, 2008 Basically im getting that moving the pads lower in the arms will make them feel squishyer but i will get more power??.If so im down with that.Pretty much, yup Quote Link to comment Share on other sites More sharing options...
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