Will Arnold Posted October 1, 2005 Report Share Posted October 1, 2005 does dot 4 or 5.1 fluid damage seals of a caliper that have been designed to use mineral oil? does mineral oil damage seals of a caliper that have been designed to use dot 4 or 5.1 fluid? thanks very much :sick: Will Quote Link to comment Share on other sites More sharing options...
JT! Posted October 1, 2005 Report Share Posted October 1, 2005 (edited) You cannot put any DOT stuff in brakes that use mineral oil. Don't know much but i know that. Edited October 1, 2005 by JT! Quote Link to comment Share on other sites More sharing options...
Ali C Posted October 1, 2005 Report Share Posted October 1, 2005 yep, putting mineral fluid in a dot system kills the seals.........putting dot in a mineral system killes the seals shame really Quote Link to comment Share on other sites More sharing options...
Will Arnold Posted October 1, 2005 Author Report Share Posted October 1, 2005 dangy, that kinda shits on my plans :sick: Quote Link to comment Share on other sites More sharing options...
Ali C Posted October 1, 2005 Report Share Posted October 1, 2005 you could buy the correct seals to fit the system, I am pretty sure hope sells mineral oil seals so people can use their levers on shimano brakes so they dont have to use the paddle shifters Quote Link to comment Share on other sites More sharing options...
Will Arnold Posted October 1, 2005 Author Report Share Posted October 1, 2005 you could buy the correct seals to fit the system, I am pretty sure hope sells mineral oil seals so people can use their levers on shimano brakes so they dont have to use the paddle shifters that still doesent recify my problem you see :sick: i have just bought an old skool hope rear brake: http://cgi.ebay.co.uk/ws/eBayISAPI.dll?Vie...y0%3D%26fvi%3D1 and i want to get a lever with a smaller piston to produce more power (it has a 10mm piston with it atm) i could go with a hope mini lever (8mm) but its an open system and i dont know whether it will work with that caliper? thanks Will Quote Link to comment Share on other sites More sharing options...
tank_rider Posted October 1, 2005 Report Share Posted October 1, 2005 if i remember correctly, the only difference between the old hope C2 and open 2 brakes was the lever. I cant really see any reason why a mini lever wouldnt work on that system. Why not give hope a ring themselves, im sure they will be able to give you a concrete answer and are still a small enough organisation to actually have time to answer pretty much any question you ask them :sick: in response to your initial question though, mineral oil will cause dot seals to swell up, and dot fluid will eat the mineral oil seals. Quote Link to comment Share on other sites More sharing options...
Ali C Posted October 1, 2005 Report Share Posted October 1, 2005 I love those old skool levers :sick: You could try hayes levers? not sure what piston size they have though, or if they take the same dot fluid. Quote Link to comment Share on other sites More sharing options...
Dan Clark Posted October 1, 2005 Report Share Posted October 1, 2005 Why not a C2 lever? Quote Link to comment Share on other sites More sharing options...
Will Arnold Posted October 1, 2005 Author Report Share Posted October 1, 2005 excellent, i may get a mini lever then :sick: and i shall ring hope to confirm on monday :- also, i will look into the hayes levers..infact i have a spare hayes poston in the shed, gunna go and measure it ;) thanks! Will Why not a C2 lever? 10mm i believe Quote Link to comment Share on other sites More sharing options...
nmt_oli Posted October 1, 2005 Report Share Posted October 1, 2005 From the looks of it, that brake is a C2 with a caliper half for fitting to non disk mouted frame. uprgrade to the old pro lever is probably the best bet, C2s are surprisingly powerful as they are, unless it will be on a tiny disk. could get ebc red pads as well, they will boost power. an open lever wouldnt work, as the pistons in the open/closed brakes are different. tey have different returning systems if i remeber correctly. An open lever would work, but not very reliably or consistently i believe. Oli Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted October 2, 2005 Report Share Posted October 2, 2005 if i remember correctly, the only difference between the old hope C2 and open 2 brakes was the lever. The C2 caliper has return springs, so theyre slightly different I think. I once tried a Mini lever on an O2 caliper (same piston ratios as a Mono Trial) - it doesnt work. I seem to remember explaining about it to you on MSN Will :sick: Quote Link to comment Share on other sites More sharing options...
downhill_rob2@hotmail.com Posted October 2, 2005 Report Share Posted October 2, 2005 Lol i have one of them old skool ones on the front of my jump bike, its shite! lol Iv somehow cracked the lever and the resevour shoots out if i pull it too hard :S lol Quote Link to comment Share on other sites More sharing options...
steve bain Posted October 2, 2005 Report Share Posted October 2, 2005 i got enduro 4's which are similair. i say get the pro levels as there very nice. check out this site for compatibility stuff. in the tech section http://www.hopetech.com/ Quote Link to comment Share on other sites More sharing options...
dave33 Posted October 2, 2005 Report Share Posted October 2, 2005 i think you need a hope hub to run that brake system! Quote Link to comment Share on other sites More sharing options...
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