Formula T1s Warranty Query

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  • Formula T1s Warranty Query
  • julianwilson

    Hmmmm. Only thought is gt85/wd40 type water dispersers.

    gt85 can have a similar effect ie swelling/failure on seals/etc of dot-fluid brakes. (iirc the overzealous use of gt85 posed a frequent problem with avid juicys back along)

    -are you sure you couldn’t have got some on/in the lever when cleaning/lubing/removing anytning else on the bar? IIRC there will be a little breather hole inside the bar clamp that has the bladder/bellows bit behind it and I would imagine that would be a weak point in terms of a contaminant getting inside and sitting there unnoticed until failure of the bladder.


    Aha! Could be onto something there, yes there is a little breather hole on the master cylinder body with the bladder behind it. I’m not a user of wd40 or any water disperser really though.

    Surely a great deal of water disperser would have to get in though before expansion?



    Hi thanks for looking!

    I bought some Formula T1s brakes about 5 months ago. I attempted to bleed the rear and the seals were blown at the calliper, leaking air into the syringe.

    I took them back and the mechanic has now claimed that I had bled them with Mineral Oil and that the seals had expanded.

    Frankly, this is nonsense. I didn’t even own mineral oil until last night when I bought some XT brakes. He has stripped the lever and the bladder in the master cylinder has expanded to ‘twice the size’, has anyone any idea why this would happen? I have ridden in some pretty hot conditions but surely that wouldn’t cause the bladder to expand?

    So, I need advice! How do I argue my case?

    Cheers, advice much appreciated.

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