Open Cycles U.P.P.E.R. (UDH) Frameset - Ultra-Light Carbon Gravel Chassis
The Open Cycles U.P.P.E.R. Frameset is the pinnacle of the gravel category, the lightest, most premium offering from Open Cycles. The Open Cycles U.P.P.E.R. is the ultra-light version of the U.P. frameset, built with a higher-modulus carbon fibre for maximum weight savings, translating the versatile geometry of the U.P. into an ultra-lightweight chassis built for competitive speed and efficiency.
The "P.P.E.R." stands for Perfect Performance Every Ride, reflecting the frameset's premium, high-modulus carbon construction that delivers significant weight savings over the standard U.P.
UDH and Component Future-Proofing - The inclusion of the UDH (Universal Derailleur Hanger) is the key update on this latest version. This feature ensures the U.P.P.E.R. is fully compatible with the new SRAM T-Type Transmission (e.g., SRAM Red/Force/Rival AXS Transmission), which requires a UDH interface for direct-mount operation. This makes the frameset future-proof for the latest electronic drivetrains while also simplifying hanger replacement.
Ultra-Light Performance - The U.P.P.E.R. uses a premium carbon layup that reduces frame weight to approximately 880g (size M), making it one of the lightest production gravel frames available. Despite this weight reduction, it retains the acclaimed multi-surface versatility of the U.P.:
Massive Tyre Clearance: Handles both 700c X 40mm tyres for fast rolling or 650b X 2.1in tyres for technical singletrack.
Open U-Turn Fork: The included full carbon fork remains exceptionally light and precise.
The U.P.P.E.R. is the choice for the rider building a no-compromise, sub-7kg machine that can win races on both the road and the roughest gravel circuits.
Full massive in-depth info and technical specifications at Open Cycles website here.
Ultra-Light Carbon: Sub-900g frame weight via high-modulus carbon construction.
UDH Compatibility: Ready for the latest generation of SRAM T-Type Transmission (e.g., RED, Force, Rival AXS Transmission).
Multi-Wheel Size: Clears 700C X 40mm and 650b X 2.1in tyres.
Complete Frameset: Includes ultra-light U-Turn carbon fork, headset, and necessary small parts
Threaded BB386: Maintains the durable, easy-to-service threaded Bottom Bracket standard.
| Specification | Detail | Notes |
| Frame Material | High-Modulus Carbon Monocoque | Ultra-lightweight layup for maximum performance. |
| Fork (Included) | Open U-Turn Carbon Fork | Extremely light, full carbon tapered steerer. |
| Rear Axle Interface | UDH (Universal Derailleur Hanger) | Key feature: Ensures compatibility with SRAM T-Type (Transmission) drivetrains. |
| Max Tyre Clearance | 700c�40mm | Optimal clearance for fast gravel tyres. |
| Max Tyre Clearance | 650b�2.1in (54mm) | Allows for mountain bike tyre capability. |
| Bottom Bracket | BB386 Threaded | 79mm Shell width, durable threaded standard. |
| Axle Standard F/R | 100�12mm / 142�12mm Thru-Axle | Standard road/gravel flat mount thru-axles. |
| Brake Mounts | Flat Mount Disc (160mm) | Minimum 160mm rotor size front and rear. |
| Cable Routing | Internal | Routing options for mechanical, Di2, or 1x systems. |
| Seatpost Diameter | 27.2mm | Promotes compliance and requires an external clamp. |
| Chainstay Design | Dropped Drive-Side | Signature design allowing for maximal tyre clearance. |
| Frame Weight (Approx) | ?880g (Size M) | One of the lightest production gravel frames on the market. |
| Fork Weight (Approx) | ?390g | Ultra-light full carbon fork. |
| Specification | Detail |
| Frame Material | High-Modulus Carbon Monocoque |
| Fork (Included) | Open U-Turn Carbon Fork |
| Rear Axle Interface | UDH (Universal Derailleur Hanger) |
| Max Tyre Clearance | 700c�40mm |
| Max Tyre Clearance | 650b�2.1in (54mm) |
| Bottom Bracket | BB386 Threaded |
| Axle Standard F/R | 100�12mm / 142�12mm Thru-Axle |
| Brake Mounts | Flat Mount Disc (160mm) |
| Cable Routing | Internal |
| Seatpost Diameter | 27.2mm |
| Chainstay Design | Dropped Drive-Side |
| Frame Weight (Approx) | ?880g (Size M) |
| Fork Weight (Approx) | ?390g |
| Specification | Notes |
| Frame Material | Ultra-lightweight layup for maximum performance. |
| Fork (Included) | Extremely light, full carbon tapered steerer. |
| Rear Axle Interface | Key feature: Ensures compatibility with SRAM T-Type (Transmission) drivetrains. |
| Max Tyre Clearance | Optimal clearance for fast gravel tyres. |
| Max Tyre Clearance | Allows for mountain bike tyre capability. |
| Bottom Bracket | 79mm Shell width, durable threaded standard. |
| Axle Standard F/R | Standard road/gravel flat mount thru-axles. |
| Brake Mounts | Minimum 160mm rotor size front and rear. |
| Cable Routing | Routing options for mechanical, Di2, or 1x systems. |
| Seatpost Diameter | Promotes compliance and requires an external clamp. |
| Chainstay Design | Signature design allowing for maximal tyre clearance. |
| Frame Weight (Approx) | One of the lightest production gravel frames on the market. |
| Fork Weight (Approx) | Ultra-light full carbon fork. |