Can any IS to post adpater be used with any make of brake?

dan1502

I've just bought some second hand Hope Tech X2 brakes and they're post mount whereas my forks are IS. I'm pretty certain I need the Hope adapter type A and should be getting hold of one soon. However ideally I'd like to use the brakes at the weekend and may not get the adapter before then. My current Hayes brakes have and adapter. Can I use that or are they make/caliper specific?

It's the front by the way and the rotors are both 160mm.

Thanks

nicklouse

generally yes you can use any.

there are one or two caliper that dont work with any but need there own.

as to you question it all depends on the disc size.

ride_whenever

some frames don't like certain adaptors either but I assume you're only doing forks.

dan1502

Yes, I currently have Hayes Stroker 160mm brakes on and the forks are IS mount. The Hopes are post mount and though I asked the selller if he would include an adapter he didn't so I don't have a Hope one. I have checked the Hope website so am 99% certain it's the A type. I do have the Hayes adapter though so wondered if I could make do with that whilst I get hold of the correct Hope one.

The Hayes are also 160 mm and I'm already using Hope discs with my Hayes Stroker Carbon's.

dan1502

I fitted these tonight and though I should get a proper Hope bracket in a couple of days I have used another for now. A came across a problem though. I centred the front caliper to the disc then span the wheel and it was catching the spokes. The caliper was already worn on the part where it was catching so it seems the previous owner had the same problem. I managed to get it so it wasn't binding or touching the spokes but the clearance is tiny. The spokes are tight and there was no problem with the Hayes caliper which makes me wonder what the solution might be. I've not ridden it yet but am wondering if wheel flex will cause it to catch again.

02gf74

post a picture on what is going on here.

having the front wheel suddenly stop is very dangerous.

I would guess the hope caliper may be designed for larger rotors - 185 or 203 mm - the spokes go in the further way they are from the centre of a hub.

If the rotor is centred and fitted correctly, then it is the caliper that is not of correct shape - for reason stated above.

You could make shims from a coca-cola tin - 0.1 mm thick, and put between the rotor and hub, inless you have centre lock hubs - but I am not sure that is a good idea since you want the rotor to make good contact with the hub to transfer heat.

The other solution would be to file down the caliper where it gets close to the spokes - again you need to post photo - as depending on what part of the caliper is interfering, that may limit how much metal you can take off.

You said you fitted 160 mm? - try 185 mm; you need rotor plus an adapter; worth paying the extra and that will be cheap compared to dental and facial reconstructive surgery.

dan1502

Thanks, that was my thinking too and I don't think it's helped by me having a 29er at the angle of the spoke will be smaller. The part of the caliper could probably be filed but that's not really something I want to do with Hope X2 brakes!

The brakes are Hope Team Green ones and I have four green floating rotors so ideally I don't want to have to change them and have found 160 mmm to be enough so far. That said, I could probably easily sell the green rotors and get enough to buy black ones. Green ones are very hard to come by so the chances of me getting a 185mm in the same colour are slim.

Hope sell these brakes as 160 mm kits so they should be ok. Maybe I should get in touch with them. My thinking was like yours in that a shim would solve the problem as there is enough room for manouver in the caliper brakcket to move the caliper in a couple of mm or more. Currently they are set so the caliper is pretty precisely centred on the disc but only a hairs width between it and one of the spokes in particular.

dan1502

I was just thinking that one solution might be to get hold of an old or cheap rotor (my old ones are still in great nick) and cut out the middle section (filing it neatly) and using it as a spacer. That would give a couple of mm clearance. Problem is I'm off to Dalby early tomorrow so would probably have to pop to evans to buy the cheapest rotor they stock.

dan1502

Off to LBS to get some shims. Easy when you know how!

louse

Hope do 1mm and 2,5mm shims. syncros do a pack of ten 0.1mm shims.

dan1502

Great, I think it'l probably be around 1mm. There isn't much more room for manouvre in the caliper oversize holes and only about 2mm before it would catch the bracket. On the plus side the rears are running great!

louse

get the LBS to check the dishing on the wheel as well.

dan1502

I coudln't take the bike to the LBS due to not having the right car today but I did get a 1mm shim and that seems to have done the trick. It's right on the limit for how far I could adjust the caliper but running smooth and cental and about a mm of clearance (as you would expect) from the spokes.

Also, I am going to get both wheels properly checked but it's an odd torx spoke key that's needed which is on order and won't be available for about 3 weeks. Spokes are tight though.

Thanks.