The Strummer Unbound CF frameset is designed to deliver maximum performance on smooth roads (tarmac) and gravel. It is manufactured with Toray T700 and designed with a shape that provides extra strength.
The asymmetrical chainstay design increases 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 sections makes this frame more precise and stiff.
The top tube is designed with a vibration-dampening zone that reduces vibration, providing a comfortable ride on gravel routes.
Frame Only variant, fork not included.
Strummer Unbound CF Frame Specifications
Compatible Seatpost: 27.2 mm Round Shape, Internal-cable dropper posts can be used.
Carbon Material: T700.
Maximum Tire Clearance: 700c, Fork 45 mm Width (Front), Frame 50 mm Width (Rear).
Headset Size: 44/52 mm Diameter, Fully Integrated
Bottom Bracket Compatibility: Pressfit 41 mm, Recommended: Strummer Press Threaded BB
Cable Routing: Full Internal Cable Routing for Frame & Fork
Weight: Fork with Internal Cable Routing and 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: Because the frame and carbon fork are handmade, weight variations may occur between individual products.
Strummer Unbound CF Fork Specifications
Weight (Including 6 Bolts & Thru Axle): 530 grams (Internal Cable), 530 grams (External Cable). The weight will be lower after cutting the steerer tube to the required length.
Material: Toray T700 Carbon Fiber
Compatible Tire Size: Maximum 700c (Max 45 mm Width, Road-Style Tire, Tire tread can affect clearance)
Braking System: Disc Brake (Flat Mount)
Compatible Hub Size: 12x100 mm (Thru Axle)
Thru-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 (64 mm Bolt Spacing, Standard Bottle Cage)
Strummer Traverse CF2 Geometry
| Specifications | 490 | 520 | 550 |
|---|---|---|---|
| Seatpost Insert Length | 180 mm | 220 mm | 250 mm |
| Reach | 374.1 mm | 377.5 mm | 386 mm |
| Effective Top Tube Length | 535 mm | 550 mm | 575 mm |
| Stack | 542.6 mm | 563.4 mm | 598.6 mm |
| Wheelbase | 1,008.9 mm | 1,014.5 mm | 1,029.6 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 |
| Standover Height with 700 × 50c Tires | 776.4 mm | 793.4 mm | 833.4 mm |
| Standover Height with 650B × 2.1-inch Tires | 766.4 mm | 783.4 mm | 823.4 mm |
| Fork Rake / Offset | 50 mm | 50 mm | 50 mm |
| Axle-to-Crown | 399 mm | 399 mm | 399 mm |
| Trail | 69.3 mm | 66.1 mm | 62.7 mm |
Size Selection Guide
| Size | Recommended Rider Height | Estimated Minimum Inseam |
|---|---|---|
| 490 / Small | 165–174 cm | Approximately 79 cm |
| 520 / Medium | 172–180 cm | Approximately 81 cm |
| 550 / Large | 180–186 cm | Approximately 85 cm |
The height ranges overlap because size selection is also influenced by inseam length, torso, arm length, body flexibility, and desired riding position.
Prioritize inseam length and standover clearance. As a guide, leave approximately 20–30 mm between your crotch and the top tube when standing over the bicycle.
If your height falls within an overlapping range:
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Choose a smaller size for a lower position and more agile handling.
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Choose a larger size for a higher front-end position and more stable riding characteristics.
Stem size, crank length, handlebar width, number of spacers, and saddle position can also affect comfort and riding position.
Examples of Bicycles/Frames Compatible with the Strummer Unbound CF Fork (Tapered)
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.
Where Can I Buy This Product?
Strummer products are available through our network of authorized dealers. To find the nearest store in your city, please click the link below.
Product Warranty?
Every Strummer product is covered by a warranty against factory defects. If an issue arises from the manufacturing process, we are ready to assist you through the warranty procedure in accordance with the applicable terms.
