Dual brake lever pull on disc and V

i just got my new polo bike (NS bitch) set up with a deore mechanical disc brake i bought second hand. used it last night at the new indoor court and it worked perfectley! i even had to leave a lot of space for the pads as the disc was slightly bent.

make pic a put it in the polo bikes thread, would be nice to see it

will do soon, just ordered a couple of bits. but eventually i am planning on having dual brakes on it. (front V and rear disc)

i just got my new polo bike (NS bitch) set up with a deore mechanical disc brake i bought second hand. used it last night at the new indoor court and it worked perfectley! i even had to leave a lot of space for the pads as the disc was slightly bent.

Luca, what is the model number/name of this disc brake? I'm pretty set on getting an Avid BB7 as recommended above but interested to see your option.

Any recommendations on a disc guard, possibly for polo might have to get something custom made from the foundry down the road.

Gabes uses a brake booster plate

I have been giving the dual brake idea a little thought and have come up with an idea. I am no engineer, so bare with me on this one! Looking at motorbikes, they often have twin front discs with two calipers, working off of one lever. What about copying this setup, running a larger master cylinder on one lever and having two brake hoses - one to the front caliper and one to the rear caliper. It works on a motorbike, so why not on a bicycle? I am not an expert on hydraulics, but surely one master cylinder squeezing fluid down two lines to two identical calipers would give equal braking front and rear?

fluids brakes for polo are not ideal as if they break in a tourney you are done, no one have spares there, so everybody* goes for cables brakes, as if the cable brakes, you have** one in your bag, and
there is alredy something very similar for cable brakes, a double brake lever that operates both brakes, plus having adjusting barrles you can set up the amount of biet for each lever independently

*there is always going to be someone with fluid brakes, but anyway
**if not you, some one for sure, irt something small, easy to carry and cheap, if you dont, you should

Ady, it sounds too complicated and possibly too heavy and as Rik says, fluid not so good for polo bashes. Mechanical is the tried and tested solution by the community although not that many people using it. V is the most popular still.

I am looking at this idea, but with magura rim brakes, not disc but hydraulics nontheless. Looking at the web to find a 1-2 hydraulic 'splitter' (Goodrige have some but it's not meant to be for bicycle brakes) and of course get a set of (battered + cheap) maguras to play with the idea. Anyone got a set they are willing to let go for the above experiment?

I have been giving the dual brake idea a little thought and have come up with an idea. I am no engineer, so bare with me on this one! Looking at motorbikes, they often have twin front discs with two calipers, working off of one lever. What about copying this setup, running a larger master cylinder on one lever and having two brake hoses - one to the front caliper and one to the rear caliper. It works on a motorbike, so why not on a bicycle? I am not an expert on hydraulics, but surely one master cylinder squeezing fluid down two lines to two identical calipers would give equal braking front and rear?

one master cylinder squeezing fluid down two lines to two identical calipers would give equal braking front and rear?

This has already been done, with magura hydraulic calipers. I'm afraid I know no more than that! He seemed to play good on it. Perhaps someone else knows more about the polo player, I think he was german (saw him playing at Berlin worlds). Hydraulics put me off though, as in polo the amount of crashes involving the bars turning are quite high, i'd imagine hoses would wear quickly meaning complete brake failure should they split. At least with cable duals you can get away with one brake should the other fail.

Rich: I sold Luca the caliper and it was sold to me as a shimano 'deore' caliper. It was a few rungs up from bargain bucket but by no means expensive (think it was about £18 new?). I believe the caliper has one adjustment to one side, whereas the BB7 allows adjustment on both pads. I had a little play on Luca's bike the other day and it actually works really nicely, good modulation for a cheap caliper.

With regards disc protection, don't bother dude. Invest in a disc straightening tool! :)

edit...should learn to type faster...

The DMR hubs suggested look good although pricey at £80, I found this deore 36H rear hub with 6 hole mount, the picture is for the front hub so I can imagine the rear to have a very narrow hub width (or whatever the term is). Do you think this will make for a weak wheel if hit from the side?

BTW frame just arrived, all very exciting!

it will be dished, as the freehub body is designed for at least 7 speed. I really rate (as do others) the Hope Pro2 single speed, as you can run a non-dished wheel, with a choice of up to 6 single speed sprockets, and a disc. plus they last forever and are desperately easy to service.

see this thread for info:
[ame="http://forums.mtbr.com/showthread.php?t=456304"]Adding gears to Hope Pro 2 SS hub? - Mountain Bike Forums[/ame]

http://www.chainreactioncycles.com/Models.aspx?PartnerID=79&ModelID=11034

Bogey, you mean this one right? Looks like it will do the job nicely although expensive. I guess this is one part of the bike I will have to accept as being expensive.

that's the one.
i bought mine off ebay built onto a jump rim second hand for £80, and there are similiar bargains to be had to date. the guy used it for heavy jumps/downhilling previous to me. i have rebuilt the hub once, and it cost about £20 for new bearings all round. works as good as the day i got it, a year or so ago.

..scares the shit out of peds too.

You guys must be going pretty fast to need all this braking power

ha!

The original reason for going disc was to help prevent the skid patch problem on freewheel with a slightly out-of-true wheel, not sure if this was the best decision going down the disc route but I'm committed now I have the frame.

Hydraulics can be split, but not by a straight split, as the piston in the lever only pushes enough sauce for one caliper, so if you split it to two calipers, both calipers will move half as much. You could try a motoX lever on 2 calipers. But personally, cables are way better for polo, easier to tweak, easier to replace.

The Hope singlespeed would be my choice, mainly for easy and cheap gear-fiddling. The only downside compared to the DMR is the narrower flange-to-flange distance, so it'll be slightly weaker. Not much though.

Hope ProII Trials, best hub.

Thanks to everyone that gave me advice on this, as you can see it's finally finished. I have for the meantime decided not to dual pull but see how I get on with 2 lever (deore and Gold Finger). I have to say I love it so far. Loads of control, stops on a dime. Rear disc doesn't seem too powerful which is perfect.

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Unfortunately within about 8 seconds of getting to my local court I had been hijacked by the local kids :)

just need some viagra for your saddle and you're good to go Rich!

Hydraulics can be split, but not by a straight split, as the piston in the lever only pushes enough sauce for one caliper, so if you split it to two calipers, both calipers will move half as much. You could try a motoX lever on 2 calipers. But personally, cables are way better for polo, easier to tweak, easier to replace.

Randomly looking for. Brake advice and found this...