I did it with the seat first as it has two springs on it mounted on two rubber balls and memory foam padding...I found that with the seat and how springy it is this way, you will not need the suspension seat post.
This extra wide seat takes care of all of this, I can ride for hours even with severe rheumatoid as well as psoriatic arthritis...My bike is a beach cruiser with no suspension other than the YLG seat and I will be 70 years old very shortly in June...That in itself should be one of the best recommendations you could possibly get for riding comfort...lol...lol.
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This is the bike before I put the YLG seat on it...It was a Schwinn noseless memory foam seat but no spring suspension in the old seat, it was comfortable enough until the arthritis got worse a few years ago.
This is a Hyper Bike Company Beach Cruiser and rides smooth as silk now that I have the YLG seat on it.
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