The Strummer Unbound CF frameset is designed to provide maximum performance on smooth roads (tarmac) and rocky surfaces (gravel). Produced with Toray T700 and designed with a shape that provides extra strength.
The asymmetric design on the chainstay enhances stiffness on the drive side, improves stability on the non-drive side, and increases clearance for larger chainrings. The monocoque production process for the front and rear makes this frame more precise and stiff.
The design on the top tube is crafted with a vibration dampening zone that can absorb vibrations, making it comfortable when traversing gravel routes.
Frame Only variant, excluding Fork.
Strummer Unbound CF Frame Specifications
Compatible Seatpost: 27.2 mm Round Shape, internal cable dropper post can be used.
Material Carbon: T700.
Maximum Tire Clearance: 700c, Fork 45 mm Width (Front), Frame 50 mm Width (Rear).
Headset Size: Diameter 44/52 Full Integrated
Bottom Bracket Compatibility: Pressfit 41 mm, Recommended to Use BB Strummer Press Threaded
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 process of Carbon Frame and Fork production, weight differences may occur between each product.
Fork Strummer Unbound CF Specifications
Weight (Including 6 Bolts & Thru Axle): 530 grams (Internal Cable), 530 grams (External Cable). Weight will be lighter after cutting the steerer tube as needed.
Material: Toray T700 Carbon Fiber
Compatible Tire Size: Maximum 700c (Max 45 mm Width, Road Style Tire, Tire Type may affect clearance)
Braking System: Disc Brake (Flat Mount)
Compatible Hub Size: 12x100 mm (Thru Axle)
Tru Axle: Total Length 125 mm, P1.5 (11 mm)
Steerer Tube Diameter: 28.6 mm, 39.8 mm at the Tapered Section Below
Extra Mounting: 3 Bolts on Each Side (Bolt Spacing 64 mm, Standard Bottle Cage)
Geometri Frameset
| Specification | 490 | 520 | 550 |
| Seatpost Insert Length | 180 mm | 220 mm | 250 mm |
| Reach | 374.1 mm | 377.5 mm | 386 mm |
| Top Tube Length (Horizontal) | 535 mm | 550 mm | 575 mm |
| Stack | 542.6 mm | 563.4 mm | 598.6 mm |
| Wheelbase | 1008.9 mm | 1014.5 mm | 1029.6 mm |
| Chainstay Length | 430 mm | 430 mm | 430 mm |
| Front Center | 593.8 mm | 599.4 mm | 614.5 mm |
| Bottom Bracket Drop | 70 mm | 70 mm | 70 mm |
| Bottom Bracket Height | 285 mm | 285 mm | 285 mm |
| 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 | 120 mm | 140 mm | 175 mm |
| 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 | 823.4 mm |
| Fork Rake / Offset | 50 mm | 50 mm | 50 mm |
| Fork Length | 397 mm | 397 mm | 397 mm |
| Trail | 69.3 mm | 66.1 mm | 62.7 mm |
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 a starting guide. Please pay attention to the frame geometry for a more accurate size. More accurate measurements require inseam, total height, and arm length. These measurements will affect the components that need to be purchased to complete this frameset. The rider's flexibility also needs to be taken into account.
Example of Bikes/Frames that are Compatible with Strummer Unbound CF Fork (Taper)
Strummer Unbound CF Gravel Carbon Frameset (2024)
Polygon Bend R2 (2024)
Interested in Our Products?
We do not offer online sales of our products. Please contact the nearest dealer/reseller to obtain our products.
Click here to find the nearest dealer location in your city. Our dealers also sell our products through several online marketplaces in Indonesia such as Bukalapak, Shopee, and Tokopedia.
We are in the process of looking for dealers/distributors outside the area of Indonesia. Contact us if you are interested in becoming our dealer/distributor.
For buyers in countries that are part of the ASEAN (Association of Southeast Asian Nations) organization and the ASIA region, you may also be able to purchase our products through Shopee. Here are the countries accessible through Shopee:
Shopee Malaysia
Shopee Philippines
Shopee Singapore
Shopee Thailand
Shopee Vietnam: Based on the check on January 18, 2025, our products are not yet available on Shopee Vietnam. You can use our website to obtain our products.
Shopee Taiwan
The stock of goods on Shopee International may not be complete. If the item you are looking for is not available, we recommend you purchase through our website.
You may need to pay taxes/import duties in your respective countries. The value of the import duties and taxes will depend on the regulations and rules in each buyer's country.
We reserve the right to change the delivery courier without prior notice if there are issues with the courier selected at checkout.
Some buyers experience issues during the payment process. You need to contact your bank to inform them that the transaction you are making is legitimate and not a fraud. This failure occurs because your credit card detects that our website is outside your country's area, thus blocking the transaction. After informing the bank, the transaction can usually be completed.
Don't hesitate to contact us for more information, we will do our best to fulfill your order.
Impressive
Where can I purchase this?
You can get our products through our network of dealers and resellers. To find the nearest store in your city or town, simply click the link provided below.
Innovation, Since Day One
Since our inception in 2008, we strive to make better products that can be depended on. Starting with our CAD technology. Our headsets remove unnecessary clamping to fork axle while providing identical performance. We are also one of the first to sell convertible hubs in Indonesia.
Pay Attention to the Details
We obsessively focus on the details. Improving by the millimeter. Adding the stiffness of our hubs by widening the flange of our hubs, thus increasing wheelset stability and strength.
