Yoeleo Altera G21 Disc Brake Gravel Frameset
The Yoeleo G21 Altera Disc Brake Gravel Frameset is a high-performance carbon gravel bike frameset. It is built for riders who want speed, stability, and versatility on mixed terrain. Designed with modern gravel geometry, it balances comfort for long endurance rides with the stiffness needed for efficient power transfer. The G21 features fully internal cable routing, clearance for wide gravel tires, and mounting points for racks, bags, and fenders. This makes it equally suited for racing or adventure. A unique Yoeleo Bikes Pro-Flex Seatpost helps absorb vibrations, while integrated tool storage keeps essentials tucked neatly out of sight. Constructed with Yoeleo Bikes’ advanced ProMoldCore carbon layup the Altera G21 delivers impressive strength-to-weight performance. This is done without cutting corners, and Yoeleo Bikes test their framesets with 100,000-cycle fatigue testing and impact testing. They are so confident in their product, they back the G21 with a 6 year warranty.
With flat-mount disc brakes, 12×100 mm and 12×142 mm thru-axles, and compatibility with the latest mechanical, wireless, and electronic drivetrains, the Altera G21 provides a durable, adventure-ready foundation for any gravel build.
Product Details
Key Features of the Yoeleo Bikes Altera G21
- Modern Gravel Design: Moderately slack headtube angle, longer wheelbase and a slightly shortened reach combine for a gravel bike that handles well on descents without compromising climbing position.
- Massive Tire Clearance: Depending on drivetrain used, the frameset accepts up to 700 x 53mm or 650b x 2.1 tire widths, opening up some seriously chunky terrain.
- Stiff Yet Compliant: A combination of intelligent frame design and advanced carbon manufacturing results in a frame that gives all-day comfort without compromising stiffness for climbing.
- Rigorous Quality Control: Extensive testing makes this frame UCI compliant, and Yoeleo back themselves with a 6 year warranty which gives peace of mind.
- UDH Derailleur Hanger Compatibility: The compatibility with a Universal Derailleur Hanger rear derailleur allows for the use of SRAM’s latest gravel drivetrains.
Yoeleo Bikes Compatibility
The Yoeleo Altera G21 is widely compatible with most modern gravel components. It is compatible with wheelsets that are disc brake and use 12×100 mm front and 12×142 mm rear thru axles. This gravel bike frameset uses a T47 threaded bottom bracket shell and a UDH style derailleur hanger. See Compatibility tab for more information.
Considerations
The Yoeleo G21 Altera Disc Brake Gravel Frameset offers impressive performance for the price, but there are a few things to keep in mind. The frameset is not as light as options from more established brands, however it performs well within its price bracket. The fully-internal cable routing is optimized for Yoeleo’s own handlebars, which means using your own stem is not as seamless.
Advice From Our Staff
We believe the Yoeleo Altera G21 is ideal for riders who want an all-round gravel bike frame that doesn’t demand a premium price. Its stiff yet compliant design gives good power transfer without overly punishing vibrations. The wide tire clearance, threaded BB and UDH are nice touches. The 27.2 round seatpost even allows for a dropper post down the line. For someone wanting a gravel racing frame, there are lighter options. However, if you’re after versatility, modern features and a clean look, the Altera G21 is an excellent choice.
Options For This Yoeleo Bikes Frameset
Paint Scheme: Champagne
Size: 52 cm | 54 cm | 56 cm | 58 cm
Optional Yoeleo H21 One-Piece Handlebar: 40 cm/80 mm | 40 cm/90 mm | 40 cm/100 mm | 40 cm/110 mm
Compatibility
- Groupsets: This frameset is compatible with mechanical, wireless and Di2 groupsets. In addition this frameset is compatible with UDH rear derailleurs.
- Tires: The maximum tire size for this frameset is 700c x 53c or 650b x 2.1" (when used with a 1x drivetrain).
- Brake Rotors: The maximum rotor size for this frameset is 160 mm for the front and 160 mm for the rear.
- Wheelset: Compatible with 12x100 mm front and 12x142 mm rear thru axle wheelsets that are disc brake.
- Saddle Rail: The seatpost comes with a clamp compatible with both 7 x 7 mm standard rails and 7 x 9 mm carbon rails.
- Stem: As this frame uses fully-internal cable routing, we recommend using Yoeleo's H9 One-Piece Handlebar for seamless integration. Using your own stem or barstem on this frame is technically possible, but might have some fitment issues with the spacers.
Yoeleo Altera G21 Frameset Specs
| Name | Yoeleo Altera G21 Disc Brake Gravel Frameset |
| Bike Type | Gravel |
| Wheelsize | 700c or 650b |
| Frame Sizes | 52 cm | 54 cm | 56 cm | 58 cm |
| Rear Dropout | 12 x 142 mm Thru Axle |
| Fork Dropout | 12 x 100 mm Thru Axle |
| Fork Steerer | Tapered, 1 1/8" Top, 1 1/2" Crown |
| Headtube | 1-1/2” Straight |
| Seatpost Shape | Round 27.2 mm |
| Seat Rail Compatibility | Regular 7 x 7 mm and Carbon 7 x 9 mm |
| Seatpost Offset Adjustment | 5 mm |
| Seatpost Weight | 95.2 grams (without clamp) |
| Frameset Material | High Modulus Toray 800 Carbon Fiber |
| Color | Champagne |
| Fork + Frame Weight | 1650 grams (56 cm) +/-50 grams |
| Max Tire Clearance | 700c x 53c | 650B x 2.1" (Single Chainring) |
| Max Brake Rotor Size | 160 mm Front | 160 mm Rear |
| Bottom Bracket Type | Threaded T47 inboard bearing |
| Bottom Bracket Width | 86.5 mm |
| Compatible Drivetrains | Mechanical | Wireless | Di2 | UDH |
| Max Single Chainring | Max 44T for 1x gravel crankset with wide spindle |
| Brake Type | Flat Mount Disc |
| UCI Approved | Yes |
| Max Rider Weight | 125 KG |
| Warranty | 6 Years |
In The Box
- Yoeleo Altera G21 Disc Brake Gravel Bike Frame
- Yoeleo Altera G21 Disc Brake Gravel Bike Fork
- Yoeleo Pro-Flex Seatpost
- 12x100 mm front and 12x142 mm rear thru axles
- Headset Parts: Top headset bearing (52 x 40 x 7 mm 45°/45°), bottom headset bearing (52 x 40 x 8 mm 45°/45°), compression ring, compression plug, compression plug top cap, bearing cover, H9/H21 Handlebar spacer kit
- UDH derailleur hanger
- Front Derailleur mount
- Front Derailleur mount cover
- Seatpost clamp wedge assembly
- Saddle clamp
- Rubber seatpost cover
- Rubber grommet covers
Yoeleo Altera G21 Gravel Bike Frameset Geometry

| Diagram | Measurement | 52 | 54 | 56 | 58 |
| Rider Height Recommendation | 5'7" - 5'10" | 5'9" - 6'0" | 5'11" - 6'2" | 6'1" - 6'4" | |
| A | SEAT TUBE LENGTH (mm) | 520 | 540 | 560 | 580 |
| B | TOP TUBE LENGTH (mm) | 536.4 | 551 | 566 | 577 |
| C | REACH (mm) | 379 | 383 | 387 | 390 |
| D | STACK (mm) | 549 | 566 | 586 | 611 |
| E | HEAD TUBE LENGTH (mm) | 107 | 126 | 145 | 171 |
| F | SEAT TUBE ANGLE | 74° | 73.5° | 73° | 73° |
| G | HEAD TUBE ANGLE | 70° | 70° | 71° | 71° |
| H | BOTTOM BRACKET DROP (mm) | 79 | 79 | 79 | 79 |
| I | CHAIN STAY LENGTH (mm) | 433 | 433 | 433 | 433 |
| J | FRONT CENTER (mm) | 605 | 615 | 625 | 631 |
| K | WHEELBASE (mm) | 1038 | 1048 | 1062 | 1074 |
| L | FORK RAKE (mm) | 47 | 47 | 47 | 47 |
Q&A
Have a question about this? Ask the staff.
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