This is a 550/600R21 tube with a TR11 Center Metal stem. These are excellent replacement parts for classic cars with nostalgic bias look radial tires. Recommended application is for Radial and recommended tire fitment is for a 550/600R21 tire. Fits 550-600 width, 21 inch diameter tires. This classic radial tube has a TR11 Metal stem and the valve stem location is Centered. TR11 stem is threaded metal stem 1 1/2 inch tall with 5/16 inch diameter. Actual item may differ from photo. Hartford brand tubes are built to meet our specifications using premium grade materials. They are designed specifically for their applications, to provide a high quality inner tube solution and reliable service life. These are excellent quality tubes, available in a wide range of sizes for collector and specialty vehicle applications.
The Hartford Rubber Works Company, established in 1881 by John W. Gray in Hartford, Connecticut, was a prominent manufacturer of rubber goods, including tires and tubes. Initially operating from a modest facility on Park Street with a workforce of about 20, the company expanded significantly by the early 1890s, becoming a major supplier of bicycle tires to the Pope Manufacturing Company, also based in Hartford.
In 1892, Pope Manufacturing acquired a majority stake in Hartford Rubber Works, integrating it into its operations. By 1899, the company was absorbed into Pope's Rubber Goods Manufacturing Company and later, in 1905, became part of the U.S. Rubber Company. Despite these transitions, Hartford Rubber Works maintained a degree of operational independence, continuing to innovate with products like the double-tube "Clincher" tires introduced in 1903 and the anti-skid "Bailey Tread" tires in 1905.
These innovations led to Hartford tires being standard equipment on early automobiles from manufacturers such as Locomobile, Olds, Baker Electric, Pierce, Racine, Packard, Peerless, Pierce-Arrow, White, Stevens-Duryea, Rambler, Cadillac, and Studebaker.
| Brand | Hartford |
| GTIN | 00842199106251 |
| Product Size | 550/600R21 |
| SKU | 87035 |
| Tube Diameter | 21" |
