The Primax E STR19 is a trekking bike with a 28-inch wheel size. The bike's base material is 6061 aluminum and the base color is black. It features Dunlop/Dutch/Presta/French (Sclaverand) valves and a spoke thickness of 14g. The brakes are rim brakes, and the rim has a width of 23.6mm. The ETRTO scale is 622mm, and the tire width is 28-62mm. The rim has single eyelets and a 6.5mm valve hole. It has 36 spoke holes and an Effective Rim Diameter (ERD) of 603.83mm. The rim has a depth of 17.5mm and is double-walled. The internal width of the rim is 19mm, and it is CNC machined and anodized. The rim height unit is 25mm.

• Brand: Primax E
• Model: STR19
• Bicycle type: Trekking bicycle
• Base material: aluminum 6061
• Base color: black
• Wheel size: 28 inches
• Valve type: Dunlop / Dutch / Presta / French (Sclaverand)
• Spoke thickness: 14G
• Brake type: rim brake
• Rim width: 23.6 mm
• ETRTO scale: 622
• Band width: 28~62 mm
• Eyelets: single
• Valve hole: 6.5 mm
• Number of spoke holes: 36
• ERD (Effective Rim Diameter): 603.83
• Rim height: 17.5 mm
• Single/double walled: double
• Rim inner width: 19 mm
• CNC Machined: Yes
• Treatment: anodized
• Height unit: 25 mm