Seatpost question

Mattrowling
Mattrowling Posts: 12
edited October 2015 in MTB buying advice
The diameter for the seat post on my frame is 30.9mm, the seat post I have found at a good price is 30.0mm. My question is whether or not I will get enough bite on the quick release to hold the seat post in position? Or will I need to look at 30.9mm seat posts? Rookie question I know- sorry

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