The Dahon Vitesse P18 2011 Folding Bike is a versatile bike designed for just about any kind of terrain you're likely to meet: think of it as a compact double road bike with faster, more nimble handling. It's fast enough for hard training rides, yet it can also be loaded up with racks and panniers for touring. And of course it's incredibly portable so it can be your constant travelling companion.

Frame:KA Series, 7005 butted aluminium alloy, custom-drawn Sonus tubing

Fork:Dahon SlipStream, Puro U7 aluminium, patented Fusion technology, double butted tubing

Front Derailleur:Forged aluminium, for flat bar road

Rear Derailleur:Shimano Tiagra SS

Shifters:Microshift Thumb tap, 18 speed

Chainset:FSA, forged aluminium, Dahon Special Edition, 55/44T CNC alloy chainrings, black ano 55 ring

Bottom Bracket:Cartridge, sealed bearings

Cassette:SRAM PG950, 11-28T

Chain:SRAM PC-971, 9 speed, PowerLink

Pedals:Suntour folding, alloy body

Front Brake:Kinetix SpeedStop V brakes, stainless link, anchor and pivot bolts

Rear Brake:Kinetix SpeedStop V brakes, stainless link, anchor and pivot bolts

Brake Levers:Avid FR6

Handlebars:Kinetix Comp, flat, double butted 6062

Headset:Dahon Fusion+, zero stack, cartridge bearings

Grips:BioLogic Arx, lock-on function, reflective end plugs

Rims:Kinetix Comp, doublewall, CNC machined sidewalls, wear line indicator, black

Front Hub:Kinetix Neutron, cartridge bearings, ultralight 58 gram design

Rear Hub:Kinetix Comp, ground races, Labyrinth water seal, 8 spd. cassette, aluminium,

今日中午出電單車時, 頭呔好似漏氣, 都夠期換呔, 跟住去 了 長沙灣 代理搞, 頭尾 米芝蓮 都係9百幾, 又幾平啝.
食完個lunch,  不如去下飛球 望望. 買咗條 單車褲, 再望望, 見一架 台灣 摺車, 無輪價錢 ($7000), 重量都到位.  於事敗了回家. 部電單車又方便放, 真係
頭牙有 44/55, 佢本身係部快車. 我試操, 轉波順, 的確街行夠晒快. 

10-4-2010 Cdale innershorts $250.
8/5/2010 加咗個Bell $80.

2013-12 部車 已 換了 一次 105, 再 換上 Ultegra 鏈盤. Dahon 的 尾架, 換上  topeak了.
seat post 同 把手 換上 carbon. 車 輕了 1磅有多.  現時 大約 25 磅, 未計 行理 水壺.
唔覺唔覺 部車 都差不多四年. 一部好車 係 好耐玩.