Coast tandem seat fit wave chassis???

[diamondsz]

Hi all I’m a single mum and have 2 children. The smallest one is on the verge of needing a seat and they’re expensive! The coast tandem seat is cheaper and I’m hoping that it will fit in the wave chassis. Has anyone tried/know 100%
As far as I can see from looking online they’re both the same width and look the same but I need to know before spending any money and having to pay return postage

Any help would be much appreciated!!

Did you ever try this out? I’m wondering the same thing and can’t find anything on the internet . I have a wave and want to buy a tandem seat for it but there aren’t many out there so might opt for a coast seat if it’s compatible