ROLLCii GRA25EC Eccentric Gravel Alloy Rim Lightweight. Wide. Built for gravel. The ROLLCii GRA25EC is a lightweight aluminium gravel rim designed around the demands of modern gravel and adventure riding. With a 25 mm internal width and an impressive 474 g rim weight, it delivers an excellent balance of low rotational weight, tyre support and everyday durability. The 25 mm internal width is optimized for modern wider gravel tyres, providing a stable tyre profile and improved sidewall support when riding lower pressures on loose, rough or technical terrain. At just 474 g per rim, the GRA25EC keeps rotational mass low without resorting to an overly fragile construction. It’s an excellent choice for riders looking to build a responsive gravel wheelset that remains capable of handling long-distance adventures, bikepacking and mixed-surface riding. The rim’s eccentric design is engineered to optimize spoke geometry and tension, helping create a balanced and reliable wheel build. Combined with a 32-hole drilling configuration and tubeless compatibility, the GRA25EC is a versatile foundation for a high-performance custom wheelset. Key Features 474 g ± weight per rim — lightweight without compromising everyday durability 25 mm internal width for modern wide gravel tyres Eccentric rim design for optimized spoke alignment and tension Tubeless-compatible Durable aluminium construction 32-hole drilling Available in 700C / 29” and 650B / 27.5” Ideal for gravel, adventure, touring and bikepacking Available in Wet Black or Polish Silver Made in Taiwan Specifications Rim Type: Gravel / Adventure Material: Aluminium Brake Type: Disc Brake Wheel Size: 700C / 29” or 650B / 27.5” Internal Width: 25 mm Rim Weight: 474 g Hole Count: 32H Tubeless: Yes Colour: Wet Black / Polish Silver Construction: Eccentric rim profile Origin: Taiwan The BuiltWheels Difference The GRA25EC makes an excellent starting point for a custom gravel wheelset. Its low rim weight helps create a lively, responsive ride, while the 25 mm internal width provides the tyre support needed for modern gravel setups. Build it with your choice of premium hubs and spokes to create a wheelset tailored specifically to your riding style — from fast gravel racing to long-distance adventure and bikepacking. ROLLCii GRA25EC — lightweight gravel performance without unnecessary weight.