Roam RTT Rain Cover Zipper Size

[Highwaystar13]

Does anyone know offhand the zipper size of the Roam RTTs specifically the rain cover. I recently had to get a new zipper because the first one broke and nearly broke the replacement trying to put the replacement on. Seems like the zippers aren't made to the highest quality so I was going to try to replace it with something along the lines of a YKK zipper.

Thanks in advance!

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