Vaast Bikes Japan
A/1 Rival 1x 650b - Matte Nostalgic Sea Blue
A/1 Rival 1x 650b - Matte Nostalgic Sea Blue
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The A/1 Rival 650b offers a more premium & lightweight 1x setup with wider tires, perfect for riders looking for added comfort and control on more technical offroad surfaces, and desire the benefits of the SRAM Rival groupset's renowned smoothness.
The geometry of the A/1 enables the bike to be both a comfortable gravel grinder and an efficient and fast grand tourer. Well-placed braze-on mounts make it easy to add on racks and fenders in front or in back for safe and dry commutes.
A/1 RIVAL 650B size & spec
A/1 Frame Geometry
| A/1 Frameset | X-Small | Small | Medium | Large | X-Large |
| R - Reach | 356 | 365 | 380 | 395 | 410 |
| S - Stack | 514 | 536 | 563 | 595 | 620 |
| TR - True Reach | 430 | 439 | 455 | 471 | 486 |
| TS - True Stack | 566 | 588 | 615 | 647 | 672 |
| 2 - Top Tube Length | 518 | 534 | 557 | 583 | 605 |
| 3 - Wheelbase | 998 | 1008 | 1023 | 1038 | 1061 |
| 4 - Chainstay Length | 425 | 425 | 425 | 425 | 425 |
| 5 - Front Center | 582 | 592 | 607 | 623 | 645 |
| 6 - BB Drop | 68 | 68 | 68 | 68 | 68 |
| 7 - Seat Tube Angle | 72.5 | 72.5 | 72.5 | 72.5 | 72.5 |
| 8 - Head Tube Angle | 69.5 | 70 | 71 | 72 | 72 |
| 9 - Seat Tube Length | 500 | 520 | 540 | 560 | 580 |
| 10 - Head Tube Length | 95 | 115 | 140 | 170 | 195 |
| 11 - Standover Heigth | 754 | 774 | 797 | 821 | 841 |
| 12 - Seat Tube Length IN. | 19.7 | 20.8 | 21.6 | 22.4 | 23.2 |
A/1 Rival 650B Specification
| Specification | |
| Frame | Allround-Allroad 700c/650b disc - AE81 ALLITE Super Mag - VAAST Allroad geometry - internal cable routing - dropper post ready. Rack and fender ready |
| Frame Weight | 1300g |
| Fork | VAAST Allround-Allroad full-carbon disc - rack & fender ready |
| Tires | Maxxis Rambler 650x47b 120tpi - EXO/Tubeless Ready |
| Max Tire Clearance | 650b, 50mm / 700c, 42mm |
| Rims | Stans Notubes Crest 27.5 |
| Rotors | SRAM Centerline 160mm |
| Crank | Praxis Zyante carbon 42T w/ M30 axle |
| Cassette | SRAM 11-42 - 11-Speed |
| Shifters | SRAM Rival 1 |
| RD | SRAM Rival 1 11sp Long cage |
| FD | n/a |
| Chain | SRAM 11sp |
| Brakes | SRAM Rival 1 Hydraulic |
| Bottom Bracket | Praxis T47 IB Enduro Bearings |
| Hub F | Sealed cartridge bearing - 12 x 100mm thru axle - Centerlock - 28H |
| Hub R | Sealed cartridge bearing - 11-speed - 12 x 142mm thru axle - Centerlock - 28H |
| Spokes | Double butted stainless |
| Axles | VAAST M12 |
| Handlebar | VAAST Allroad Pro, butted 6061 aluminum |
| Stem | VAAST Allroad Pro, 3D forged, 6 degree |
| Grips / Tape | VAAST Anti Slip |
| Seat Post | VAAST Carbon fiber 27.2mm (300mm XS/S/M. 350mm L/XL) |
| Saddle | WTB Volt 142 Comp |
LIGHTER, STIFFER, PROFOUNDLY BETTER.
VAAST Bikes is the first to use ALLITE® SUPER MAGNESIUM™, a true innovation in material science. This high-strength alloy features excellent shock absorption properties, weighs 33% less than Aluminum and 50% less than Titanium by volume, and is significantly stronger than both.
Through the exclusive use of this eco-friendly metal, we have achieved a ride that feels like no other.
VERSATILE | ONE FRAME, TWO WHEELSETS
The Model A/1 supports both 650b and 700c with a frame, with 700c wheels and room for up to 42mm tires. While the switching to 650b wheelset will offer extra room up to 50c.
It is just a tire swap away and has been designed for riders who want the perfect blend of gravel capability without giving up anything on paved road group rides or their daily commute.
GEOMETRY THAT KNOWS YOUR NEEDS
The A/1 encourages you to go further yet stay comfortable and confident. The longer wheelbase and lowered bb drop compared to traditional road bikes are to give you more stability and handling in tactical terrain.
While the relaxed geometry is an art that combines endurance ride, gravel ride, and bike touring, all in one frame.