October 5, 201510 yr See scraubers answer, strangely the bulto brakes worked ok with chrome and saved weight too. But the reason for change back then and now is the failing suface, no could be about it. Ok, so I'm the only one who isn't satisfied with ok brakes, fine by me. Edited October 5, 201510 yr by guys
October 5, 201510 yr I contacted them (InMotion) in the beginning of 2014 and they told me they don't do the re-lining anymore because of risen expense. They did offer me to give me the contact details of the work place were they had them done, but I eventually found someone in France. I'm pretty sure mine's also done with steel liners, and it's a very noticeable improvement over the chrome liner. I do have the intention though, to use EBC or fork lift brake shoe material instead of the Newfren next time, to see if it's an additional improvement. Guy, next time you need a hub lined a can give you a contact in UK. Newfen work well in gramica hubs, fork truck lining can be grabby.
October 5, 201510 yr I have had my hubs relined and wheels rebuilt by Paul in Huddersfield and the plan is to send my old brake shoes to villiers services to be relined, any feed back on there brake re lining materials please. All the best Joe Edited October 5, 201510 yr by bultacorock
October 6, 201510 yr Ok, so I'm the only one who isn't satisfied with ok brakes, fine by me. Guys man up, different thing chrome failed brakes were relined otherwise we wouldnt even be having this conversation
October 6, 201510 yr Interesting subject with as many opinions as posters. I have a couple of bikes with original chrome and these can be made to work fine and given a choice I would always prefer original chrome hubs. All my bikes have the pivot in the brake plate bushed to eliminate wear and I always set up and machine the shoes mounted on the brake plate in a lathe to give 100% contact area. Lining the brake drums is a way to save otherwise unusable hubs. I find interesting that we seem to have a debate regarding steel or cast iron. I also appreciate that many different grades of steel or iron are available. My own opinion is that cast iron is best. I appreciate the actual cast process must be a factor but you have to ask why most car drums and disc's are cast iron? I work as a designer (engines) for a major car manufacturer and must admit to taking a trawl through the drawing data base at drawings for drums and discs to see what grades were specified. I am still firmly in the cast iron camp. Stuart
October 6, 201510 yr Interesting subject with as many opinions as posters. I have a couple of bikes with original chrome and these can be made to work fine and given a choice I would always prefer original chrome hubs. All my bikes have the pivot in the brake plate bushed to eliminate wear and I always set up and machine the shoes mounted on the brake plate in a lathe to give 100% contact area. Lining the brake drums is a way to save otherwise unusable hubs. I find interesting that we seem to have a debate regarding steel or cast iron. I also appreciate that many different grades of steel or iron are available. My own opinion is that cast iron is best. I appreciate the actual cast process must be a factor but you have to ask why most car drums and disc's are cast iron? I work as a designer (engines) for a major car manufacturer and must admit to taking a trawl through the drawing data base at drawings for drums and discs to see what grades were specified. I am still firmly in the cast iron camp. Stuart Interesting comments, have you also done a cost analysts ? Are car brakes running in similar conditions to trials ? Are they over/under spec"d to compensate for their actual performance ?
October 7, 201510 yr I have a Pursang hub i am looking to have relined, it is larger than the Sherpa i believe at 140mm diameter. Any suggestions on the best place to send this would be appreciated.
October 7, 201510 yr Guys man up, different thing chrome failed brakes were relined otherwise we wouldnt even be having this conversation Nigel, could you rephrase that sentence please, because I don't understand what you're saying. Don't forget I'm from Belgium.
October 7, 201510 yr What do the WRC cars run anyone know? Whatever it is there'll be a service crew standing by to replace it when it wears out in the middle of an event so not really what we want.
October 7, 201510 yr What do the WRC cars run anyone know? Will either be cast iron for non factory cars & possibly extremely expensive carbon ceramic in the factory cars if the rules allow although I wouldn't be so sure of that though due to fragility
October 7, 201510 yr I have a Pursang hub i am looking to have relined, it is larger than the Sherpa i believe at 140mm diameter. Any suggestions on the best place to send this would be appreciated. Try Ross Danbys dad he used to do them I think hes not so far from you?
October 8, 201510 yr Note that Moto GP use carbon fibre composite discs in fine conditions (carbon fibre only works while it is hot) and ferrous discs when it is a wet race. What racing vehicles use is not of much relevance to trials bike brakes I would say
October 8, 201510 yr Nigel, could you rephrase that sentence please, because I don't understand what you're saying. Don't forget I'm from Belgium. I will have a go at translating Dabsterese into Aussie English "Guys, admit that you are wrong. The reason people reline Bultaco hubs is because the chrome lining fails. If we didn't have to reline Bultaco hubs the discussion would not have begun"
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