20110318

Rob English's Custom TimeTrial Bike

Read more for pics and details...

Rob English is a custom bike/frame builder with a simple philosophy; "that the rider is causing most of the drag, therefore the most important thing is to get the rider into the most aerodynamic position as possible". Of course a bike (and its components) must play a major role in the science of aerodynamics, but the key point is the rider's position to cut as much drag as possible. Rob's material of choice, steel. "And don't think my steel bikes will be heavy" Rob claims, "my race bike weighs in at 11.5lbs.... I use tubing from True Temper, Reynolds and Dedacciai, with fillet brazed construction"
Custom handlebars
Going lower and maintaining a traditional position was optimal so he decided to run a “negative” mounted handlebar setup. The handlebar is therefore incorporated into the top of the fork, below the lower headset race, leaving the top of the head tube looking pretty bare with a Chris King headset on display. The resulting effect is that the rider has an ultra low, super aerodynamic, powerful TT position...

Custom brakes
Rob didn’t take a standard brake, mount it backwards and then attach a tight brake noodle too it as we see in so many TT bikes. Rob actually went out of the way to create two different brake designs, going as far as using completely different mounting styles. The front brake, a single bolt design, uses a pulley and a pinch bolt to “scissor” the brakes closed (weighing in at a scant 66 grams). 
The rear brake mounts more like the old U brakes but completely practical and out of the way as to avoid causing any drag.
Internally Routed Cables
Cables are routed internally, completely out of the way of the rider and the wind (amazing attention to details).
Custom Hidden Hubs
The idea here is to hide the spokes from the air as much as possible, to make the wheels as aerodynamic as possible, while retaining control over it in windy conditions. The width, from flange to flange, is a scant 32mm. Loaded with tried-and-true 6900 bearings, the hub (more as a side effect than anything intentional) weighs a feathery 66 grams.


Integrated Seatpost


Specifications:

Frame: English custom built steel TT, integrated seatmast 1429g
Fork: English custom built steel TT, intergrated fork/bar 754g
Aero extensions: English custom aluminium 174g
Armrests/pads: Oval carbon 114g
Headset: Chirs King 1" NoThreadSet 100g
Seatpost: English integrated 48g
Saddle: Selle Italia Flite 214g
Brake Levers: Vision TT 72g
Gear shifters: SRAM R2C carbon 175g
Front brake: English custom single pivot pulley activated 66g
Rear brake: English custom scissor action center-pull 92g
Crank/BB: FSA Neo-Pro carbon, 170mm, 42-54 980g
Pedals: Speedplay X2 198g
Chain: KMC X-10SL 224g
Front derailleur hanger: English custom bolt-on 14g
Front derailleur: Shimano Ultegra 76
Rear Derailleur: SRAM Force 176
Cassette: Shimano Ultegra, 11-23 10spd 218
Front wheel: English TT hub, Sapim CX-ray x 16, Edge 1.68 rim 506g
Rear wheel: Zipp Disc 980g
Tyres: Vittoria/Veloflex tubulars 490g
Wheel skewers: Tune Airline 18g
Bar end plugs: English custom 14g
Bar tape: Profile 10g
Cables: Nokon 80g
Computer: Cateye wireless 55g

Weight: 16.0lbs

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