Ross McArthur Posted March 16, 2009 Report Share Posted March 16, 2009 Hey, as the topic title says, I'm wondering if it's possible to design/make a +10mm Hope disc brake adapter so I can use my 180mm caliper with a 190mm rotor? Quote Link to comment Share on other sites More sharing options...
Al_Fel Posted March 16, 2009 Report Share Posted March 16, 2009 Hey, as the topic title says, I'm wondering if it's possible to design/make a +10mm Hope disc brake adapter so I can use my 180mm caliper with a 190mm rotor?Its only going to be 5mm extra braking leverage so its really pointless in my opinion. I'd just stick with 180mm. Unless you get a disc adaptor made for this purpose rather than bodging one its probably going to flex too much to be effective. Quote Link to comment Share on other sites More sharing options...
Revolver Posted March 16, 2009 Report Share Posted March 16, 2009 You could try more washers in the 180 mount. Might need longer bolts though.If you fancy the challenge, make a mount, why not. Quote Link to comment Share on other sites More sharing options...
Matt Vandart Posted March 17, 2009 Report Share Posted March 17, 2009 I think you would have great difficulty making this as the +20 is close to the limit.Having said that if you brought the mountinng holes for the disc part down a bit radially it would give you more chance.Matt Quote Link to comment Share on other sites More sharing options...
Muel Posted March 17, 2009 Report Share Posted March 17, 2009 You could try more washers in the 180 mount. Might need longer bolts though.If you fancy the challenge, make a mount, why not.It's a hope dude, they're IS only.I'm sure it's doable, you best bet is to ask Adam at Tarty. Also I think Hope can occasionally do custom adapters and stuff like that? Quote Link to comment Share on other sites More sharing options...
Ross McArthur Posted March 17, 2009 Author Report Share Posted March 17, 2009 Its only going to be 5mm extra braking leverage so its really pointless in my opinion. I'd just stick with 180mm. Unless you get a disc adaptor made for this purpose rather than bodging one its probably going to flex too much to be effective.I would be getting one made. It would be a bodge, as such, but a good one....Its not like im going to use straws, pipe cleaners and PVA glue.You could try more washers in the 180 mount. Might need longer bolts though.If you fancy the challenge, make a mount, why not.More washers? Its a Hope, not an Avid.I do fancy a challenge yes.The reason im trying this is because I have a Hope 190mm rotor and a 180mm Gusset rotor. The Hope has more grabbing surface so I want to use that.I was thinking if I made a thin plate with two holes to be bolted to the forks and two for the caliper. I may have to file the fork disc tab down a bit. The caliper would have to sit closer to the tab as the 5mm extra length I would need to meet the 190mm disc rotor wouldnt be enough for the caliper to clear the tab.Thoughts? Quote Link to comment Share on other sites More sharing options...
Matt Vandart Posted March 17, 2009 Report Share Posted March 17, 2009 Have you got auto cad?If so I can send you a picture I have just done calculating the positions of the holes relative to the axles.Matt Quote Link to comment Share on other sites More sharing options...
Ross McArthur Posted March 17, 2009 Author Report Share Posted March 17, 2009 Have you got auto cad?If so I can send you a picture I have just done calculating the positions of the holes relative to the axles.MattShaweeet. I'll Pm you my email. Quote Link to comment Share on other sites More sharing options...
Muel Posted March 17, 2009 Report Share Posted March 17, 2009 I was thinking if I made a thin plate with two holes to be bolted to the forks and two for the caliper. I may have to file the fork disc tab down a bit. The caliper would have to sit closer to the tab as the 5mm extra length I would need to meet the 190mm disc rotor wouldnt be enough for the caliper to clear the tab.I doubt you'd have to file to forks mounts down, just put a washer or two on the end of the hub axle. You could make the little plate out of stainless, it should be stiff enough, then if the plates only 2-3mm thick then you can just pack the end of the axle out.You might have to bend the forks apart slightly though, and the axle might not stick into the fork dropout very far, but it would save you having to file the fork!Another option would be to bolt the plate to the outer face of the disc mount, then just pack the caliper back in with spacers/washers. You can usually space the rotor out a bit aswell so it should be that hard. Quote Link to comment Share on other sites More sharing options...
Ross McArthur Posted March 17, 2009 Author Report Share Posted March 17, 2009 I doubt you'd have to file to forks mounts down, just put a washer or two on the end of the hub axle. You could make the little plate out of stainless, it should be stiff enough, then if the plates only 2-3mm thick then you can just pack the end of the axle out.You might have to bend the forks apart slightly though, and the axle might not stick into the fork dropout very far, but it would save you having to file the fork!Another option would be to bolt the plate to the outer face of the disc mount, then just pack the caliper back in with spacers/washers. You can usually space the rotor out a bit aswell so it should be that hard.No, thats not what I meant. I mean I will have to file down the edge of the tab, not the inside of it. The caliper may sit too far out from the rotor if this was'nt done....See what i mean? Quote Link to comment Share on other sites More sharing options...
Muel Posted March 17, 2009 Report Share Posted March 17, 2009 Yeh I knew what you meant, I just thought you'd probably struggle to get it set up straight if you've filed the mount down.Personally I'd try bolting the adapter to the outside of the fork mount, then spacing the caliper back in with a load of washers first, I just think you'd keep it straight easier. Quote Link to comment Share on other sites More sharing options...
Ross McArthur Posted March 17, 2009 Author Report Share Posted March 17, 2009 Yeh I knew what you meant, I just thought you'd probably struggle to get it set up straight if you've filed the mount down.Personally I'd try bolting the adapter to the outside of the fork mount, then spacing the caliper back in with a load of washers first, I just think you'd keep it straight easier.How would filing the mount down make me struggle to set it up straight? Filing the edge of the tab won’t interfere with that.A load of washers? Muel, I'm going to be getting a billet of aluminium milled out for me. It wont be as crude as a stainless plate with loads of washers whapped in-between the lot....What do you take me for? Quote Link to comment Share on other sites More sharing options...
Muel Posted March 17, 2009 Report Share Posted March 17, 2009 Well that's how I would do it, and my Echo had 6mm of spacers packing the caliper out for over a year. Sorry for offering my ideas! Quote Link to comment Share on other sites More sharing options...
N.Wood Posted March 17, 2009 Report Share Posted March 17, 2009 It seems you're pretty convinced it would work and have the tools to do it, so why not just go ahead and see what happens? My personal opinion is that its a pointless excersise even if it does work, but there we are. Quote Link to comment Share on other sites More sharing options...
Prawny Baby Posted March 17, 2009 Report Share Posted March 17, 2009 How about you stop being cheap, buy a hope +20, and a 200mm hope rotor, and stop making annoying threads about pointless shit. Quote Link to comment Share on other sites More sharing options...
Ross McArthur Posted March 17, 2009 Author Report Share Posted March 17, 2009 Well that's how I would do it, and my Echo had 6mm of spacers packing the caliper out for over a year. Sorry for offering my ideas!Dry your eyes mate, I know its ard to take but her minds bin made up.... Quote Link to comment Share on other sites More sharing options...
Al_Fel Posted March 17, 2009 Report Share Posted March 17, 2009 Hey, as the topic title says, I'm wondering if it's possible to design/make a +10mm Hope disc brake adapter so I can use my 180mm caliper with a 190mm rotor?Yes. Question answered.This thread is about as pointless as what you are trying to do. Quote Link to comment Share on other sites More sharing options...
Ross McArthur Posted March 17, 2009 Author Report Share Posted March 17, 2009 (edited) Yes. Question answered.This thread is about as pointless as what you are trying to do.Now now, put your dummy tit back in. No need for that.A very helpfull soul has done me some CAD drawings showng me the details. Edited March 17, 2009 by Ross McArthur Quote Link to comment Share on other sites More sharing options...
Prawny Baby Posted March 17, 2009 Report Share Posted March 17, 2009 it's pointless though Ross, why go to the trouble of making up CAD drawings and everything, and then having to get it made, which I'm sure will end up costing you more than the £30 or so you need for a hope 200mm rotor and +20! Quote Link to comment Share on other sites More sharing options...
Ross McArthur Posted March 17, 2009 Author Report Share Posted March 17, 2009 it's pointless though Ross, why go to the trouble of making up CAD drawings and everything, and then having to get it made, which I'm sure will end up costing you more than the £30 or so you need for a hope 200mm rotor and +20!S'all free man. And while I sit on my toosh in work thinking about it im getting paid for it.Wheres the engineering sparks in peoples minds these days!!Why spend "£30 or so" when I can make something for my bike with my own two hands and be super proud of it?! Quote Link to comment Share on other sites More sharing options...
N.Wood Posted March 17, 2009 Report Share Posted March 17, 2009 Well whats the point in this thread then? If you think you can do it and theres no cost to try it, just get on with it Quote Link to comment Share on other sites More sharing options...
Krisboats Posted March 17, 2009 Report Share Posted March 17, 2009 Dry your eyes mate, I know its ard to take but her minds bin made up....If your just going to shoot down anyone who disagrees with your idea, your getting it done for free and you begin acting up against the people who are putting in valid contributions then what is the need for this thread?Clearly your minds made up and your not having to pay for it so why even ask? Quote Link to comment Share on other sites More sharing options...
Ross McArthur Posted March 17, 2009 Author Report Share Posted March 17, 2009 If your just going to shoot down anyone who disagrees with your idea, your getting it done for free and you begin acting up against the people who are putting in valid contributions then what is the need for this thread?Clearly your minds made up and your not having to pay for it so why even ask?Im not the only one whos shooting people down in this thread.As I said, all I wanted to know is if it could be done?...Has any one done it before? Could maybe someone offer a helping hand? Is'nt that what the forums about?People did very kindly try and help me out, so how is it pointless?If I wanted to go and spend £30 quid on a rotor and adapter I would have. Posts telling me to do so are POINTLESS!! Quote Link to comment Share on other sites More sharing options...
Krisboats Posted March 18, 2009 Report Share Posted March 18, 2009 Im not the only one whos shooting people down in this thread.As I said, all I wanted to know is if it could be done?...Has any one done it before? Could maybe someone offer a helping hand? Is'nt that what the forums about?People did very kindly try and help me out, so how is it pointless?If I wanted to go and spend £30 quid on a rotor and adapter I would have. Posts telling me to do so are POINTLESS!!You are the only one to start throwing in random and petty remarks though. It is a pointless task, of course your going to have people telling you that. What did you expect? Besides, the majority of posts telling you that it was pointless backed it up with a reason... not just a petty dig. Muel told you how he has gone about it and that it worked that way for a certain amount of time and you reply with that post. Its "knowledge" by the way... Quote Link to comment Share on other sites More sharing options...
jambo Posted March 18, 2009 Report Share Posted March 18, 2009 (edited) Ross has the mentality of an engineer so he makes and mods loads of cool shiz for his bike rather than just buying it and as he sits about working on war ships all day he has the resources to get the stuff made to the highest standard possible. Sometimes its nice to throw an idea out there to see if anyone has done it before and to see if they hit any problems on the way, makes life easier and I`m sure if someone asked something similar that he had experience of he would be more than happy to help. Edited March 18, 2009 by jambo Quote Link to comment Share on other sites More sharing options...
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