Here is an older thread where we beat up the 15" tire subject way back in 2013. Some things have changed a bit, but much less than it did from 2008 to 2013 when it was previously beat up. Since the forum won't allow searches older than 10 years, the early 2008 threads have disappeared.
https://board.moparts.org/ubbthreads/ubbt...tml#Post1519474There are high speed and high traction 15" options out there. However, either prepare to pay a lot for them, or run them as an outlaw race item on a street car. If someone is preparing to make a V rated G60-15 that appears to be period correct in Polyglas or Wide Oval livery, your gonna pay for them. Upside is their life cycle and wear resistance (bias plys won't tolerate the alignment angles a radial will so their wear will be accelerated) will probably be so short that you'll still replace them regularly despite the low mileage of a collector car. No chance to dry rot em.
These guys offer a wide variety of vintage, historic, race, street, custom treaded slicks and TA style wheels. This is their price list sheet, so click through each tire name to see different offerings. some have pictures, some just size and prices. Want VR rated 15" tires, $500+ and most sizes are limited to 205-255 section widths.
https://rogerkrausracing.com/index.php/race-tire-pricing/These guys used to be know as McCreary. As a race tire manufacturer, they have a whole lot of selection in 15" to includes slicks, treaded, and d.o.t. carcass designs. Most are bis play, but there are some radials mixed in there too. 13"-15" sizes are their specialty.
https://americanraceronline.com/Of course Hoosier is well known and prolific with their race tires. Bias and radial, slicks to wets, d.o.t. and more. They have some discontinued 27x8x15, four groove asphalt slicks in there for $50 each. Want an inexpensive G60 bias ply race tire with tread that looks street legal and grips like mad, how about the IMCA spec tires for under $125 each. Hoosier has em.
Main Hoosier site:
http://www.hoosiertire.com/IMCA G60s:
http://hoosiertirewest.com/g60-15-imca/A lesser known provider outside of outlaw bullrings, these guys have been making racing tires and retread racers for decades. Don't shake your head at the retread part. I've abused their retread designs in racing environments for years without a separation. How about a tire with 3* of camber built into the tread face? These guys make em. They also make vintage pie crust slicks for the drag racing guys.
https://www.towelcityracingtires.com/
