Originally Posted by
Hisamatsu
Yea their saddle and grips are "designed in conjunction" too. People swap them about all the time which legally you can argue breaks the warranty, but doubt most company will be that nit picky.
At least in US you cannot make that argument legally unless the manufacturer can show that the substituted part led directly to the failure. Denying a warranty claim due to the customer using unauthorized parts or service that are unrelated to the failure is a violation of the Magnuson-Moss act:
part 700.10(c), as revised, states that “a warrantor cannot, as a matter of
law, avoid liability under a written
warranty where a defect is unrelated to the use by a consumer of
unauthorized articles or service ...