D Rock 45 Posted July 30, 2012 Report Share Posted July 30, 2012 After an hour of googleing i can find an answer to how silicon oil is rated for dampaning. Does anyone know it is rated ? Quote Link to comment Share on other sites More sharing options...
Pashley26 Posted July 30, 2012 Report Share Posted July 30, 2012 (edited) It is rated in weight and centistrokes like every other oil. 20wt, 30wt, 40wt, 20st, 50st, 100st etc. Edited July 30, 2012 by Pashley26 Quote Link to comment Share on other sites More sharing options...
dezmtber Posted July 30, 2012 Report Share Posted July 30, 2012 you mean fork oil? the thickness is rated in XXw (the w indicates the weight or thickness of the oil) most front forks use 5w or 7.5w to make them slower use thicker or higher number oils. i would usualy use 10w or 15w to slow forks down if you just need to top it up best you use 7.5w Quote Link to comment Share on other sites More sharing options...
Pashley26 Posted July 30, 2012 Report Share Posted July 30, 2012 Don't forget about the cSt of the oil though, that indicates it's viscosity under operating conditions. No point in having a 15w oil if it loses viscosity at temperature. 1 Quote Link to comment Share on other sites More sharing options...
Luke Rainbird Posted July 30, 2012 Report Share Posted July 30, 2012 In something like a set of MTB forks I wouldn't have thought that it'd be subjected to any particularly severe temperature changes, but worth knowing about so that you understand why engine oil etc has to be relatively specific Quote Link to comment Share on other sites More sharing options...
Pashley26 Posted July 30, 2012 Report Share Posted July 30, 2012 (edited) It can be quite a problem with air forks, I know with Fox forks if the oil isn't thick and doesn't have enough stiction it doesn't offer sufficent protection for the damper seals and causes premature wear. TF are always refusing warranty on Leftys for that, and I once had Mojo refuse a warranty on a 9 month old FIT 36 RLC and Fox Fluid wasn't used when the customer wanted a tune. Unless you have done it before and know what you are doing I would reccomend boxing it up and sending it to the respective service center and getting it tuned whilst you are at it. In theory of cause, this might have nothing to do with forks lol Edited July 30, 2012 by Pashley26 Quote Link to comment Share on other sites More sharing options...
D Rock 45 Posted July 30, 2012 Author Report Share Posted July 30, 2012 thanks for the replys so the higher the cSt the more damping i will get. Quote Link to comment Share on other sites More sharing options...
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