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techtalk:ih:wheels01 [2021/09/12 02:14] hippysmack [Tires] |
techtalk:ih:wheels01 [2021/09/12 02:23] hippysmack [Tapered Bead Tires] |
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| ===== Tapered Bead Rims ===== | ===== Tapered Bead Rims ===== | ||
| - | The "special" wheels that were paired to the "special" tapered bead rims were known as "C-section" rims. \\ | + | The "special" tapered wheels that were paired to the "special" tapered bead rims were known as "C-section" rims. ((HD Service Bulletin #597)) \\ |
| "C-section" rims can be positively identified after the tire is removed from the rim by the part numbers stamped in rim. \\ | "C-section" rims can be positively identified after the tire is removed from the rim by the part numbers stamped in rim. \\ | ||
| + | The taper was at the 'normally flat' area from the inside bead seat corner and the shelf edge at the drop towards the drop center. \\ | ||
| + | The metal 'shelf' tapered toward the center with a safety hump just before the drop down. \\ | ||
| + | This was a "special package" buy from Goodyear with the rim included since you couldn't buy the tires to properly fit the rims anywhere else but them. | ||
| + | |||
| * "C-section" Rim Part#s for "High Ground Clearance" Sportsters: | * "C-section" Rim Part#s for "High Ground Clearance" Sportsters: | ||
| * Steel Rims: | * Steel Rims: | ||
| Line 474: | Line 478: | ||
| - | ==== Service Updates ==== | + | ===== Tapered Bead Tires ===== |
| + | |mystique surrounding the use of taper based tires/ rims apparently centered around 18" and 19" rear tires. ((http://www.jockeyjournal.com/forum/archive/index.php/t-22085.html)) | ||
| - | * **Tapered bead rims**, both steel and aluminum, were used on 70's model Sportsters. The taper was at the 'normally flat' area from the inside bead seat corner and the shelf edge at the drop towards the drop center. The metal 'shelf' tapered toward the center with a safety hump just before the drop down. It looks like it was a 'special package' buy from Goodyear with the rim included since you couldn't buy the tires to properly fit the rims anywhere else but them. ((HD Service School service bulletin #597)) | + | Starting in 1970, Harley Davidson partnered with Goodyear for new "special" tires and rims for standard "high ground clearance" Sportster models. ((HD Service Bulletin #597)) \\ |
| - | * The special "C-Section" rims are identified by the following numbers stamped inside the rim: | + | The tires are identified on the sidewall as (front - 3.75 x 19 Sport Rib and rear - 4.25 x 18 All Traction) \\ |
| - | * Steel rims: Front 43003-70/19 x 2.50C, Back 43004-70/18 x 2.50C ((HD Service School service bulletin #597)) | + | The MoCo has written that these tires must be used exclusively for replacement on the special "C-secton" rims. \\ |
| - | * Aluminum rims: Front 43010-70/2.50C-19, Back 43008-70/2.50C-18 ((HD Service School service bulletin #597)) | + | These rims have a special tapered bead seat with a safety hump at the top of the center drop. \\ |
| - | | + | By design, standard tires such as Goodyear 3.50 x 18, 4.00 x 18 or 3.25/3.50 x 19 sizes will not fit correctly on these rims and are an unsafe replacement. \\ |
| ==== Goodyear Taper Bead Tires (70-78) ==== | ==== Goodyear Taper Bead Tires (70-78) ==== | ||
