The Strummer Unbound CF frameset is designed to provide maximum performance on smooth (tarmac) and rocky (gravel) roads. Manufactured with Toray T700 and designed with a shape that provides extra strength.
Asymmetric design on the chainstay increases stiffness on the drive side, increases stability on the non-drive side, and increases clearance for larger chainrings. The monocoque frame production process on the front and back makes this frame more precise and stiff.
The design of the top tube is designed with a vibration dampening zone which can reduce vibrations, so it will feel comfortable when passing gravel routes.
In the purchase package you get a fork, frame and headset.
Product Specifications
Seatpost Diameter: 27.2 mm
Carbon Material: T700
Maximum Tire Clearance: 700c, Fork 45 mm Width (Front), Frame 50 mm Width (Rear).
Headset Size: Diameter 44/52 Full Integrated
Cable Routing: Full Internal Cable Frame & Fork
Weight: Fork Internal Cable with Front 12x100 Thru Axle (545 grams), Frame Parts & 12x142 Thru Axle (74 grams), Headset 170 grams, Frame Only ST490/ST520 (1040/1090 grams). Total Weight ST490/ST520 (1829/1879 grams).
Note: Due to the Handmade Carbon Frame and Fork manufacturing process, there may be differences in weight between each product.
Frameset Geometry
Specification |
490 (S) |
520 (M) |
550 (L) |
Seatpost Insert Length |
180 mm |
220 mm |
250 mm |
Reach |
374.1 mm |
377.5 mm |
386mm |
Top Tube Length (Horizontal) |
535 mm |
550 mm |
575 mm |
Stacks |
542.6 mm |
563.4 mm |
598.6 mm |
Wheelbase |
1008.9 mm |
1014.5 mm |
1029.6 mm |
Chainstay Length |
430 mm |
430mm |
430mm |
Front Center |
593.8 mm |
599.4 mm |
614.5 mm |
Bottom Bracket Drop |
70mm |
70mm |
70mm |
Bottom Bracket Height |
285 mm |
285mm |
285mm |
Seat Tube Angle |
73.5°
|
73°
|
72.5°
|
Head Tube Angle |
71°
|
71.5°
|
72°
|
Seat Tube Length |
490 mm |
520 mm |
550 mm |
Head Tube Length |
120mm |
140 mm |
175mm |
Bike Standover Height (700x53c) |
776.4 mm |
793.4 mm |
833.4 mm |
Bike Standover Height (650B*2.1") |
766.4 mm |
783.4 mm |
823.4mm |
Fork Rake / Offset |
50mm |
50 mm |
50 mm |
Fork Length |
397 mm |
397mm |
397mm |
Trail |
69.3 mm |
66.1 mm |
62.7mm |
Sizing Guide
Size 490 (Small) = Height 155-165 cm
Size 520 (Medium) = Height 165-175 cm
Size 550 (Large) = Height 175-183 cm
The sizes above are only an initial guide. Please pay attention to the frame geometry to get a more accurate size. More accurate measurements require inseam measurements, total height, and hand length. These sizes will affect the components that need to be purchased to complete this frameset. Rider flexibility also needs to be taken into account.