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We've paid close attention to the Crumbworks Chunk since we visited the shop back in March 2023 and caught a glimpse of Keita's prototype! It's an incredible frame that tastefully mixes old and new standards, has elegant swooping curved tubes, and rides just right. We'll be building one up and putting together a proper review soon, but until then pre-orders are open here.
Specs
Handmade in Japan. Made by RIZINWORKS.
- Tubing: TANGE 4130 Cro-mo mixed up!
- Head Tube Diameter 1" Threaded
- Bottom Bracket: 68mm English (BSA) Threaded
- Fork Spacing: 12x100mm
- Rear Spacing: 12x142mm
- Seatpost Diameter: 27.2mm (Stealth dropper post routing)
- Disc Brake Type: Flat mount for 160mm rotors
- Maximum Tire Size: 27.5x2.8
- Chainring Clearance: 42t single
- 3 sets bottle cage mounts
- Rear rack and mudguard mounts
- Full-length cable housing guides for derailleurs and brakes
- Triple cage mounts fork
- Stealth Dynamo routing
- Kickstand plate
Geometry
| S (47cm) | M (50cm) | L (54cm) | |
| Top Tube (Effective) | 590mm | 620mm | 660mm |
| Seat Tube (C-T) | 470mm | 500mm | 540mm |
| Head Tube Angle | 69° | 69° | 69° |
| Seat Tube Angle | 71° | 71° | 71° |
| Head Tube Length | 185mm | 200mm | 230mm |
| Chainstay Length | 470mm | 470mm | 470mm |
| BB Drop | 50mm | 50mm | 50mm |
| Fork Rake | 50mm | 50mm | 50mm |
| Fork Axle To Crown | 410mm | 410mm | 410mm |
| Weight | 3.05 Kg | 3.25Kg | 3.45 Kg |
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Review Crumbworks Chunk Frame and Fork
