I took the measurements from a ready made large size seat (cost $650.00) and added space for my big boy. I can show more detail and give dimensions and such if anyone is interested.
I looked into sidecars and trailers but there were problems. I love having my dog right there, experiencing everything together. BTW Rainan is 7 months old here and weighs 65 pounds. His expected adult weight will be about 90.
I think with an erect sit he will have plenty of room as an adult. Two weeks into this we keep the speed below 40 and only ride, without break, for 45 minutes. Ha! If scooting generally brings us to full attention then X10 with a dog on back. OK then - we love it!
Hope to have some on the road shots soon. sheesh everybody on the road with an iphone has all these shots already.
This site has been very helpful in all all things Scootering. Thanks!
Love my GTS and have had no problems at 22,000 miles.
Chris and Rainan