Rugged-Road Carbon Gravel E-Bike | Shimano GRX 1×11 & 625Wh Power Tube
$5,499.00
Is S6DA C GRX 820 the best bikepacking ebike? We think so. Its Bosch Performance Line Speed drive system and 625Wh battery give you the freedom to take the scenic route more often and cover more ground between sunup and sundown. And the carbon frame with our Class 5 VRS™ design soaks up road vibrations to keep you comfortable during those long days in the saddle. Carry anything from your camping gear to your #CoffeeOutside kit with Tributary’s frame and fork cargo mounts. Shift and brake smoothly with Shimano’s GRX 820 components, designed for rugged gravel road use. If you’re on the hunt for a bikepacking ebike — or just curious about the possibilities — S6DA should be on your packing list.
- Meets UL 2849, and UL 2271 certification
| Frameset | |
|---|---|
| Frame | Tributary Carbon |
| Color | Dark Pine/Terra Orange |
| Fork | Tributary Carbon |
| Rear Shock | N/A |
| Components | |
| Headset | Acros |
| Seatpost | TranzX dropper post, 100 mm travel |
| Stem | Salsa Guide Trail |
| Grips/Bar Tape | Velo anti-slip |
| Saddle | WTB SL8 |
| Handlebar | Salsa Cowchipper |
| Lights Included | No |
| Drivetrain | |
| Front Derailleur | N/A |
| Rear Derailleur | Shimano GRX RX822 |
| Cassette | Shimano Deore M6100, 10–51t, 12-speed |
| Drive Type | Mid-drive |
| Chain | Shimano Deore M6100 |
| Crankset | FSA CK-762, 42t |
| Shifter | Shimano GRX RX820 |
| Brake Levers | Shimano GRX RX820 |
| Brake Calipers | Shimano GRX RX820 |
| Assist Levels | 4 |
| Rotors | Shimano RT64 |
| Drive Unit | Bosch Performance Line Speed |
| Ebike Classification | Class 3 |
| Max Assist Speed | 28 mph/45 kmh |
| Motor Torque | 85Nm |
| Max Motor Assist | 340% up to 600W |
| Battery Capacity Watt Hours | 625Wh |
| Battery Type | Bosch PowerTube 625 |
| Removable Battery | Removable for service |
| Battery Power Volts | 36V |
| Battery Capacity Amp Hours | 16.7Ah |
| Estimated Charge Time | 5.4 hours |
| Charger Included | Yes |
| Range Estimate | 25–100 miles |
| Throttle | No |
| Walk Assist | Yes |
| Wheels | |
| Front Tire | Teravail Ehline 29 x 2.3″, Durable casing |
| Rear Tire | Teravail Ehline 29 x 2.3″, Durable casing |
| Front Hub | Shimano TC500 15 x 110mm |
| Rear Hub | Shimano TC500 12 x 148mm |
| Rim | WTB ST i27 (taped, tubeless valves included) |
| Weight | |
| Complete Bike | 42 lb 9 oz for Medium |

| Size | X-Small | Small | Medium | Large | X-Large |
| A. Effective Top Tube | 535 | 560 | 585 | 610 | 635 |
| B. Stand Over | 725.1 | 729.7 | 775 | 808.9 | 827.4 |
| C. Reach | 373.7 | 398.7 | 417.6 | 437.6 | 457.7 |
| D. Stack | 601.8 | 601.8 | 624.8 | 643.2 | 661.7 |
| E. Total Seat Tube Length | 380 | 405 | 460 | 500 | 520 |
| F. Headtube Length | 100 | 100 | 125 | 145 | 165 |
| G. Headtube Angle | 67 | 67 | 67 | 67 | 67 |
| H. Seat Tube Angle | 75 | 75 | 75 | 75 | 75 |
| I. BB Drop | 70 | 70 | 70 | 70 | 70 |
| J. BB Height | 303 | 303 | 303 | 303 | 303 |
| K. Chainstay Length | 445 | 445 | 445 | 445 | 445 |
| L. Fork Length Axle to Crown | 498.4 | 498.4 | 498.4 | 498.4 | 498.4 |
| M. Fork Offset | 51 | 51 | 51 | 51 | 51 |
| N. Wheelbase | 1094.4 | 1119.4 | 1148 | 1175.8 | 1203.7 |
| Crank Arm Length | 165 | 165 | 170 | 170 | 170 |
| Handlebar Width | 44 | 46 | 48 | 50 | 52 |
| Recommended Rider Height | 155.0 – 163.0 | 163.0 – 170.0 | 170.0 – 178.0 | 178.0 – 185.0 | 185.0 – 193.0 |
| Stem Length | 50 | 50 | 50 | 50 | 50 |
Measurements based on:
- An unsprung bike (no sag)
- A 29 x 2.3″ tire measuring 747 mm in diameter
- Standover (B) for all sizes is measured vertically to top of toptube from a position
Frame Specs
| Design Wheel/Tire Sizes | 29″ |
| Max Tire Outer Diameter | Tire Clearance Frame:29 x 2.5″ Tire Clearance Fork:29 x 3.0″ |
| Frame Construction | Carbon |
| Fork Construction | Carbon |
| Suspension Fork Length (Travel) | 498mm A2C (120mm travel) |
| Fork Offset | 51mm |
| Rear Spacing | 12 x 148mm |
| Rear Axle Size | M12 x 175mm, TP=1.0, TL=14mm |
| Rear Brake (Rotor) | Flat Mount |
| Front Brake (Rotor) | 180mm |
| Headset – Upper | IS52 |
| Headset – Lower | IS52 |
| Front Spacing | 15 x 110mm |
| Front Axle Size | 15 x 135mm, TP=M15 x 1.5 |
| Steerer Tube | 28.6mm |
| Crown Race | 1.5″ |
| Seatpost | 30.9mm |
| Dropper Post Compatible | Yes, internal |
| Seatpost Clamp | 35mm |
| Front Derailleur Clamp | N/A |
| Front Derailleur Type | N/A |
| Derailluer Hanger | SRAM UDH |
| Crankset (Max Ring) | 42t (52mm) |
| Accessory Mounts | Rack Mounts Frame:Yes Fender Mounts Frame:Yes Downtube Accessory Mounts:None Fender Mounts Fork:Yes, with adapter |
| Bottle Mounts | Frame:2 Fork:2 |
| Size | L, M, S, XL, XS |
|---|
Frequently Asked Questions
1.Do you provide OEM manufacturing services for private brands?
Yes. Sunremo has over 20 years of experience in OEM manufacturing, delivering premium-quality customized bicycle frames for global brands. From material selection to final quality inspection, every step follows strict manufacturing standards to ensure consistency, reliability, and long-term performance.
2.Can you develop a custom frame design exclusively for our brand?
Absolutely. We offer both OEM and ODM solutions. Whether you already have drawings or need full product development from concept, our engineering team supports geometry design, layup optimization, prototyping, testing, and mass production — ensuring your product stands out in both performance and branding.
3.Do you work with small or emerging brands?
Yes. We partner with brands of all sizes, from startups to established international companies. Our flexible production system allows scalable order quantities while maintaining the same quality standards and technical support.
4.What is your minimum order quantity (MOQ)?
MOQ depends on the model and customization level.
Standard models: The standard MOQ is 100 pieces
Full custom ODM projects: discussed based on tooling and development scope
Please contact us for an accurate quotation.
5.Can you provide samples or prototypes before mass production?
Yes. We strongly recommend sample validation before bulk production.
Prototype lead time is usually 20–45 days, depending on complexity and testing requirements.
6.What quality standards and certifications do you follow?
Our frames are manufactured under strict quality management systems.
Products can be tested and certified according to ISO, EN, and UCI standards upon request, ensuring compliance with international safety and performance requirements.
7.What warranty do you offer?
Sunremo provides a 2–5 year structural warranty depending on the frame model and application. Detailed warranty terms are supplied with each project.
8.What payment methods do you accept?
We accept secure and flexible payment methods including T/T, L/C, D/P, D/A, PayPal, and bank transfer.
9.How long is production and delivery time?
Production time depends on order volume and customization level:
10.Why choose Sunremo as your manufacturing partner?
✅ Direct factory with stable production capacity
✅ Advanced carbon fiber manufacturing expertise
✅ Strict QC and traceability system
✅ Flexible OEM/ODM cooperation model
✅ Competitive pricing with premium quality
✅ Professional international communication support












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