Dumb brake disk Q. Are these on the correct way?

Sorry for the basic question here but I thought the grooves should be spiralling towards the direction of travel for the pads to bite into? Are these on back to front?

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this has been talked about for many years :excited: i think if the vents inside the disk are uni directional/straight it doesn't matter

id say those are correct
 
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that's how i fitted mine..it doesnt really matter though..seen many fitted the other way round on factory cars and discs..
 
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