width of base and use of lapbelt

Hi Carole, thank you for your enquiry. The widest point on the base is 37cm, however when the capsule is attached to the base then its 44cm wide. We would strongly recommend to contact your nearest Baby On The Move store https://www.babyonthemove.co.nz/store-locations/ and they can try this capsule and others to see which one would best suit your needs. We hope that helps with your query.