My Speedster has 15.5 inch width speedster seats.
It a bit tight.
What is the norm now-adays?
Don't know of an "average size". Guess that all depends on how wide the load sitting in it is. Every speedster I have ever built, the seat skin ID was 17 1/2 - 18. The wood base of a Model A Tudor seat is 18-1/2. My last two speedsters will be more a bench seat base with a slight bucket back.
I have seen very plush seats, I have seen seats with just a covering with no padding. All up to you.
Mine are 18.5" wide and close to that in length
When I sit in the seat the left and right side rubs against my hips.
Not only that but my leg length is a total detriment.
How I so wish to drive this vehicle.
One of my speedsters has seats from a Model A, the other one has Karman Ghia seats.
It's a speedster, there is no "norm". While there's a guy on eBay who sells speedster seats, which I assume have a "standard" width, most are just made by the builder and are most likely sized to their own "dimensions".
I opted for a bench seat.... 43" wide
You can get seats on ebay from stitchbitch.
I made my own. They are 18" X 18". The sides flare to about 22" wide. I'm just now building the pedestals for them to sit on. I mounted the drivers seat on adjustable tracks that I bought from a farm supply store. Considering I am 6'4" and my wife is 5'2" and the plan is for her to drive this car. It is getting either a automatic or a 4 speed (final decision soon)!!
So does the T trans count as an auto?
Lard Ass Supply sells seats for the broad gauge set. Each pair comes with a
"WIDE LOAD" sign for the back of the car !
About 15-1/2" inside the cushions on mine.
Looks like built for comfort not for speed applies!!
Bench seat, 38".
There are advantages to building your own. like many folks do. Mine are singles, offset for additional hip and shoulder room. Each is 17.5" wide.
Also have storage built-in below, with hinged doors.
The wooden seats' sides on my speedster are 17-1/2 inches at the top of the seat cushion, about 17 inches at the base, and about 19-1/2 inches at the top. Not even snug for my can ;)
Drove it about 60 miles yesterday, in Ford Hi/Warford Hi/Ruckstell Hi (Direct) up the hills. Epic little journey, including the flat.