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Vaast Bikes Japan

U/1 650b - Matte Black

U/1 650b - Matte Black

Regular price ¥298,000 JPY
Regular price Sale price ¥298,000 JPY
Sale Sold out

VAT to be collected upon delivery


The Model U/1 650b has been designed for what most people who venture out on a bike need. It is the unsung hero of the bike world: Fast, light, and nimble on all surfaces. Quick around your local bike trail, cool around the block, and rugged and durable on your gravel roads, fire roads and trail adventures.


Its sporty geometry, vibration dampening materials, and wide, comfortable tires will eat up the miles wherever you take it. It is perfect for riders who want a comfortable do-it-all bike, packed with performance and multi-functionality.

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U/1 650b size & spec

U/1 Frame Geometry

R REACH 390 410 435
S STACK 555 590 631
TR TRUE REACH 455 475 500
TS TRUE STACK 606 641 682
2 TOP TUBE Length, Horizontal 560 590 628
3 WHEELBASE 1045 1077 1116
4 CHAINSTAY Length 438 438 438
5 FRONT CENTER 615 647 686
6 BB DROP 65 65 65
7 SEAT TUBE angle 73 73 73
8 HEAD TUBE angle 71 71 71
9 SEAT TUBE Length 405 455 510
10 HEAD TUBE Length 130 167 210
11 STANDOVER Height 715 758 808
12 SEAT TUBE Length inches 16.2 18.2 20.4
13 CRANK Length 170 170 170
14 STEM Length 80 80 80
15 HANDLEBAR Width 660 660 660




U/1 650B Specification

Frame Urban Optimized 700c / 650b AE81 ALLITE Super Mag - VAAST Urban geometry - internal cable routing - fender / rack ready
Fork VAAST Urban full-carbon disc - rack & fender ready
Tires WTB Venture 650b x 47mm Road Plus Comp w/tan skinwall Tire
Rims Alex 650b Double Wall aluminum - 28H - Presta Valve
Rotors 160mm F & R
Crank Forged Alloy - 40T
Cassette microSHIFT 11-42T - 9-speed
Shifters microSHIFT Advent 1 x 9
RD microSHIFT Advent M619M 1 x 9 speed
FD n/a
Chain KMC X9
Brakes Hydraulic disc brakes w/Three finger lever
Bottom Bracket Sealed cartridge bearing
Hub F Sealed cartridge bearing - 6-bolt disc - 12 x 100mm thru axle - 28H
Hub R Sealed cartridge bearing - 6-bolt disc - QR - 28H
Spokes Double butted stainless
Axles VAAST M12 F / QR R
Handlebar VAAST Urban Pro - 6061 butted aluminum
Stem VAAST 3D forged
Grips / Tape VAAST Dual Density
Seat Post VAAST Micro adjust aluminum - 27.2mm x 350mm
Saddle VAAST Urban Sport


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.


The Urban Model U/1 was designed for what most people who venture out on a bike need. The U/1 is fast, light, and nimble on all surfaces.


The U/1 exists to get you anywhere a paved route will allow you to go on a daily basis in a surprisingly comfortable way. When equipped with 650b wheels and tires it’s also a capable bike on gravel roads, fire roads, and suitable for other light trail adventures.