28 Inch tires
I Agree with Bri at the start of the tread..... but I just want to add my 2 cents here.....
Most of us here know our options at this point when it comes to tires and wooden rims.
For wooden rims there is Noah Stutzman - He will make a wooden rims to meet your specifications ( if you are willing to wait ) and he also makes the clincher rims with metal inserts for higher tire pressures. He is just a little difficult to get a hold of - nothing that cannot be solved by letter writing. Secondly, there is CB Italia ( though, they do not do a Carbon insert and you are limited to lower tire pressures for clinchers ). The third option is Ghisallo.... they do make a Carbon insert for clincher rims and you can use modern tires at higher pressure with these. The other option is the P35 / Blunt modern rim.
For Tires - in original format we are very limited. Richard Dean makes the most ridable reproduction tires....pneumatic tubular and limited in colour. Coker is also there along with Universal. Most modern tubulars work well. For Clinchers - most people choose the Electra Amsterdam & Schwalbe Delta Cruiser for a 700c fit. Others include CST Super HPS, Vittoria Ranonneurs & Zafiro Pro, Mich - Panaracers, Colnago C-50, Vredestein classic, Origin 8 Elimin-8er, Kenda Kwest etc etc...There are a few other options & No names from India. I am sure people will have a much larger list to add to here - these are just some of the popular options.
This said, I found the problem is price point for tires.... If you reach the right price point the Cabe / Wheelman followers are very willing to purchase these. BUT I think you will find that demand is limited. My suggestion is to get an Investment together through crowd funding ( kickstarter, GoFundMe, Etc... ) and see if you can raise the 35 grand needed. I am sure The Cabe / Wheelman followers and many others would be willing to donate. Many people have used this method of funding to get projects started.
I would like to see someone partner with Richard Dean ( in an ideal world ) to make this happen. I would just use Richard for his expertise and advice as it looks like you have already lined up a partner manufacturer. China is also another option for production. I found during my research that India would be an ideal place to do this kind of thing - but you would realllllly need to be hands on at the start of the project. They do both handmade and machine manufacturing and still use natural rubber if you are interested.
But be warned - it is a very small section of the bicycle industry and demand will be minimal...meaning you will not get rich from doing this project unless you are able to find a way to bring it to the wider bicycle industry.
Best of luck - I would buy a few..... I think 150 per pair is fair (but a max price) for most people.
Regards,
Will