From the ebay listing for this bike: "Vintage 1977 Jack Taylor Tandem. Made with tandem gauge Reynolds 531 tubing. Custom touring racks made with Reynolds 531 tubing as well. Wheels are 48 spoke w/ Phil wood hubs. Phil Wood sealed BB. Approx 24" front seat tube length and 21" stoker....depends how you measure it. Red anodized TA triple cranks."