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Venn 400 THL SL 1k filament wound ultralight hookless gravel rim
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$349.00
1k filament wound hookless gravel rims. 40mm profile, disc brake.
Spec sheet for wheel builders (PDF)
Prefer it built? This rim is also sold as complete wheels: Venn 400C carbon gravel wheels, built and trued to order on vennwheels.com.
Gravel optimized performance
The Venn 400 C gravel rims combine aerodynamic efficiency with the durability demands of off-road riding. The modern 25mm internal width is optimized for gravel tires from 38mm to 50mm, while the 40mm profile provides meaningful aerodynamic advantage without compromising handling in challenging conditions.
Our latest evolution in carbon manufacturing uses an ultra-precise 1k winding process – meaning each tape contains exactly 1,000 carbon fibers.
1k filament winding is the fifth generation of the process we started in 2015: the narrow 1k tow allows even more precise fiber placement and creates a smooth, well-compacted structure with fewer voids.
Think of it like building with LEGO® – using smaller bricks allows you to create a more detailed, precise structure. This refined process delivers an uncoated Class-A finish and allows for better gas evacuation during the curing process, resulting in an even more uniform carbon structure with superior compaction.
The rims are compatible with tubeless tires designed for hookless rims. Optimal widths are between 38mm to 50mm
Rim profile
Carbon filament winding
| Brand | Venn |
|---|---|
| Brake compatibility | Disc |
| Tire type | Hookless |
| Size | 29", 700c |
| Width | 31mm widest (30mm at the bead), 25mm internal |
| Depth | 40mm |
| Rim weight | Raw finished 400±15g |
| Rider weight limit | 110kg |
| Hole number | 20 holes, 24 holes, 28 holes |
| ERD | 560.5mm |
| Finish option | Gloss uncoated, Matte uncoated, Filament wound 25k (+25 g per rim) |
| Decals | Silver Venn Hanko, Black Venn logo (original), None (plain carbon) |
| Tool access holes | Yes, needs tubeless tape, No, true tubeless (not compatible with internal nipples) |
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