lobbster Posted September 26, 2010 Report Share Posted September 26, 2010 right then guys. seeing as im in the market for some brakes for my road bike i thought why not go for some hs33 or similar on it. i will be making my own mounts and that isnt a problem but.. i have two main questions and seeing as a large portion of trials guys run them this seems like the best place to come there seem to be hundreds of different pad compounds to use. seeing as i cant find anyone else who has done this its pretty new ground so maybe people could help me choose. as the tyres are really thin it is pretty easy to skid so maybe i need a pad that would offer a bit more modulation on a trials bike to have the same effect of a sharp pad for you guys. it also needs to work in the wet because i will be using the bike to cycle to uni all winter. my second question is about bleeding them with water. does it just feel horrible and mushy or is it more of a v brake kind of feel? and lastly is this the best place to find them? i prefer the look of the old style hs33 so that is what im after. i have seen some sets on here around £25 and that doesnt seem bad but i cant post in those threads yet so is there anywhere else to look in the mean time? Quote Link to comment Share on other sites More sharing options...
trials owns Posted September 26, 2010 Report Share Posted September 26, 2010 not sure about them on a road bike, but water is a really nice feel, its nice and springy,compared to oil as it is thinner than oil so therefore moves through the hoses quicker. look on ebay but they never go for very cheap on there, i say wait a little while until you get validated to save a few bob , here have a vote. Quote Link to comment Share on other sites More sharing options...
Laurence--Trials Posted September 26, 2010 Report Share Posted September 26, 2010 What does water do when it reaches 0 deg - c ? Quote Link to comment Share on other sites More sharing options...
lobbster Posted September 26, 2010 Author Report Share Posted September 26, 2010 oh yeah i didnt think of that. probably will make a bit of difference. ill have to put salt or anti freeze in it if i do use water Quote Link to comment Share on other sites More sharing options...
Shaun H Posted September 28, 2010 Report Share Posted September 28, 2010 oh yeah i didnt think of that. probably will make a bit of difference. ill have to put salt or anti freeze in it if i do use water Whatever you do don't use salt! It will quickly corrode the steel return spring in the lever and any other steel parts in the system which could play havoc with the seals. If this is for an actual road bike on 700c wheels I'd reconsider using HS33s. Even on the widest 700c tyres you have a relatively small contact patch through which you can only put limited stopping traction. With decent pads a normal road caliper should give you more than enough stopping power, an HS33 could be all too easy to grab and it will quickly lock the wheels, particularly dangerous when making turns (especially in the wet as you mentioned you'd be riding in). If you are committed to using Maggies though, Koolstop pads are probably a good bet, you can pick them up pretty cheap from what I remember too. Quote Link to comment Share on other sites More sharing options...
t-comp-kierz Posted September 28, 2010 Report Share Posted September 28, 2010 Get some magura hs77s Quote Link to comment Share on other sites More sharing options...
lobbster Posted September 28, 2010 Author Report Share Posted September 28, 2010 Whatever you do don't use salt! It will quickly corrode the steel return spring in the lever and any other steel parts in the system which could play havoc with the seals. If this is for an actual road bike on 700c wheels I'd reconsider using HS33s. Even on the widest 700c tyres you have a relatively small contact patch through which you can only put limited stopping traction. With decent pads a normal road caliper should give you more than enough stopping power, an HS33 could be all too easy to grab and it will quickly lock the wheels, particularly dangerous when making turns (especially in the wet as you mentioned you'd be riding in). If you are committed to using Maggies though, Koolstop pads are probably a good bet, you can pick them up pretty cheap from what I remember too. your being very helpful here. ill stay away from the salt. and yes it is for a 700c road bike. the contact area on my rims isnt that small so i dont think that will be an issue. i am also aware that road brakes could be just as good but it works out being more expensive and im also partly doing it for the geekyness of it . ive also had so many different middle of the range brakes and they always start good but after the rim gets dirty and its raining etc they just dont work anywhere near safely. now the locking was an issue i though of but that is why i am considering a water bleed. i dont know anyone that has done it so i only know what oil feels like. will the feeling be less instant and easier to modulate? Quote Link to comment Share on other sites More sharing options...
Shaun H Posted September 28, 2010 Report Share Posted September 28, 2010 and yes it is for a 700c road bike. the contact area on my rims isnt that small so i dont think that will be an issue. i am also aware that road brakes could be just as good but it works out being more expensive and im also partly doing it for the geekyness of it . ive also had so many different middle of the range brakes and they always start good but after the rim gets dirty and its raining etc they just dont work anywhere near safely. now the locking was an issue i though of but that is why i am considering a water bleed. i dont know anyone that has done it so i only know what oil feels like. will the feeling be less instant and easier to modulate? All rim brakes will lose performance when the rim gets dirty/wet, if you keep your rims clean after dirty rides you should see the returns in brake performance. Personally I find I get more "feel" using an oil bleed. People use water bleeds in trials as it is a thinner liquid, meaning the brake can go from open to locked to open again quicker. A water bleed for your intentions will probably exacerbate the problem of locking the wheels and be detrimental to feel but not significantly. If the brakes are already bled with oil I'd just leave them as they are, you can then avoid the problems sub zero temperatures bring! Quote Link to comment Share on other sites More sharing options...
lobbster Posted September 28, 2010 Author Report Share Posted September 28, 2010 All rim brakes will lose performance when the rim gets dirty/wet, if you keep your rims clean after dirty rides you should see the returns in brake performance. Personally I find I get more "feel" using an oil bleed. People use water bleeds in trials as it is a thinner liquid, meaning the brake can go from open to locked to open again quicker. A water bleed for your intentions will probably exacerbate the problem of locking the wheels and be detrimental to feel but not significantly. If the brakes are already bled with oil I'd just leave them as they are, you can then avoid the problems sub zero temperatures bring! yeah i know all brakes lose performance but these have the brute force to stop the wheel even when it is dirty. the bike never gets cleaned because its just for getting to uni and back. i have a bmx for riding for fun Quote Link to comment Share on other sites More sharing options...
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