ROLLCii GRA25EC Alloy Rim

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.