advice needed from c35/50 tubular owners

[etu]

I bought a pair of c35 tubular wheels off of the local craigslist last year. I just removed the tires and cleaned the rim and found a "divot" opposite from the valve stem hole. Is this normal or do I have a pair of defective wheels? Same divot for both front and rear.
Great riding wheels but obviously not worth the risk if they're compromised or not a genuine Shimano product.

[gngroup]

Normal on my C50's as well -

[radsmd]

Probably where they removed the bladder used for molding, then closed the opening with a separate layer of carbon fiber.

You got those wheels super clean though. That must have taken forever. My tubular wheels aren't that clean even when new. :beer:

[etu]

whew! thanks guys.
goo gone makes glue removal painless.

[ultraman6970]

I do not know the wheels but I suspect they do that on purpose so the tubular seats better and the valve area, which sometimes gets a funny fit.