Bill_B Posted May 3, 2007 Report Share Posted May 3, 2007 What size fittings and bore pipes are used in cycle brakes, I could measure my shimano discs on my XC bike but its at home and I'm thinking on work time thanksBill. Quote Link to comment Share on other sites More sharing options...
Tomm Posted May 3, 2007 Report Share Posted May 3, 2007 They're all different. Maguras are M8 for the main hose and M6 for the crossover. Don't know about any others. And if you're thinking of attaching a different lever to maguras you wouldn't be the first Quote Link to comment Share on other sites More sharing options...
Bill_B Posted May 3, 2007 Author Report Share Posted May 3, 2007 No I'm thinking about internal brakelines in the frame, I've seen it done before by:a) drilling holes in the frame tube and threading nylon brake hose through, then spending hours trying to get it out of a small hole in the other end of the frame,and drilling holes in the frame tubes and brazing internal small dia tubes in to simply thread the nylon lines throughI'm thinking of the next step and fitting internal copper hard lines in the frame terminated at the frame surface and just using short braded lines from the lever to the frame (probably just under the top tube) and then a short braded line from the seat stay to the caliper, everything inbetween would be a single hard copper of stainless steel line.this should marginally reduce weight, keep brake lines out of harms way and most importantly look bloody cool and make for a very tidy frame.I have also though of using hard lines between the caliper and frame as they do not move relative to each other, but a hard line would not take kindly to knocks and unless very short and out of the way would easily get damaged and cause problems.thoughts people? Quote Link to comment Share on other sites More sharing options...
Greetings Posted May 3, 2007 Report Share Posted May 3, 2007 Vincos had internal hose guides and most frames cracked where the holes were. Quote Link to comment Share on other sites More sharing options...
Bill_B Posted May 3, 2007 Author Report Share Posted May 3, 2007 Vincos had internal hose guides and most frames cracked where the holes were.were they alu or steel frames? I think of a steel frame with the correct strengthening gussets it would be do-able, on an Alu frame I think you waould be asking for trouble. Quote Link to comment Share on other sites More sharing options...
Tomm Posted May 3, 2007 Report Share Posted May 3, 2007 I think Iolo offers internal cable guides on his (Steel) frames. Quote Link to comment Share on other sites More sharing options...
Broomer Posted May 3, 2007 Report Share Posted May 3, 2007 yeah, he has a copper tube braized inside the top tube, so you dont spend hours fiddling trying to get it through. Quote Link to comment Share on other sites More sharing options...
Greetings Posted May 3, 2007 Report Share Posted May 3, 2007 QUOTE(Bill_B @ May 3 2007, 04:47 PM) ←were they alu or steel frames? I think of a steel frame with the correct strengthening gussets it would be do-able, on an Alu frame I think you waould be asking for trouble.The Vincos are literally made of tinfoil. I guess this example just shows that holes can be a big stress point in a weak frame but with a steel one you'll be fine Quote Link to comment Share on other sites More sharing options...
RobinJI Posted May 3, 2007 Report Share Posted May 3, 2007 yep, Iolo does this. He brazes an 8mm internal pipe inside the frame tube which comes out where you ask him to end it . Then you just thread your hose through it. Like you can see on my bike:If you are thinking of having the inside of the frame acting as part of the hosing the tube you use will only need an inside diameter of 1.5mm, any more and the amount of fluid in there will be heavyer than the hose anyway, and it will be a pain to bleed because one seringe may not do the whole break. Any smaller than 1.5mm and it will make the break feel sluggish.Anyway, to the point:Hope - M6 fittingsMagura discs and maggie main hose - M8 fittingsShimano 180deg conectors - M8 fittingsShimano 90deg conectors - M6 fittingsThis could help to, maybe (hope braided hose by the way): Quote Link to comment Share on other sites More sharing options...
Bill_B Posted May 4, 2007 Author Report Share Posted May 4, 2007 Thanks guys,yes I've been looking at custom frames, Iolo and Leeson were two frames with hidden pipework and both look so much tidyer for it. I just though using solid lines would be less flexible than braided hose and potentially give a more solid/predictable feeling brake lever.I wouldn't dream of doing this on an aluminium frame, but then I wouldn't trust my lardy arse on a alu frame either.I'll have a look into M6 and 6 hydraulic fittings, as for the syringe thing, I would fit brakes that I couldn't bleed through by adding oil in the caliper and beeling it through the lines and through the caliper.I'm pretty sure I can get 1.5ish mm copper pipe, just need to check if I can get fittings on to it (they may need soldering) and a suitable method of attaching them to the frame. Quote Link to comment Share on other sites More sharing options...
RobinJI Posted May 4, 2007 Report Share Posted May 4, 2007 I'd say by far the best looking way to do it would be to put a M6 whole in the side of the frame, at 8 or so mm deep M6 threaded tube in the side of the top tube, with the thin copper/stainless hose running off the end of it, you could either bulge it out of the side at an angle and use either an M6 straight fitting, or you could have the whole in the underside at 90deg to the tubing and put a 90deg connector on it.M6 is definitely going to be your best bet though, as you can get hold of an M6 fitting that will work with pretty much any break, and if in doubt, a braided hose could be used with whatever fittings you liked. Quote Link to comment Share on other sites More sharing options...
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