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Look 675:

Targeting the race and sportive market, the French Look 675 aims to be sharp and fast with enduring comfort, and as we rolled along our local valleys the frame worked hard to smooth the decaying road surface.

The integrated stem creates a very tidy front end, the top tube angle increasing to meet it, while the underside sweeps down to join the head tube. Angular tube shaping up front is mixed with flattened stays at the rear and a slim 27.2mm diameter seatpost, for a combination of both space age and conventional looks.
The stays and seatpost certainly offer a reasonable amount of compliance, and a different saddle might improve things further, but with such racy wheels there’s a limit.
Mavic’s 50mm deep Cosmic Carbone SSCs are noticeably stiff, and both help and hinder the bike. Through some testing switchbacks the dextrous front end turned in beautifully, the wheels helping to carve consistently, and over rolling hills their stiffness complemented the frame’s superb power delivery to climb efficiently.
Going back down, handling and agility were both top notch, the incisive fork coping well with some optimistic cornering. The surprise is the usually excellent Exalith braking track; shedding speed definitely required some forward planning.
As the wind got up it tugged at the front wheel as we passed gaps in the hedge; the wider carbon spokes give more purchase for the wind, making them a little harder to handle, but in combination with the fairly conventional frame it didn’t give great cause for concern. And as the rain set in, wet weather performance was predictably consistent.
This article was originally published in Cycling Plus magazine.

675

• CARBON FRAME AND MONOBLOC MANUFACTURE

The 675 is the latest born LOOK road frame. It benefits from a completely new manufacturing process: the 3 most highly loaded frame zones are first draped on mandrels before being placed inside the mould with the rest of the frame for moulding. This technology permits a large gain in stiffness and a stronger frame.

• INTEGRATED A-STEM STEM & DIRECT DRIVE CONCEPT

For the first time on a road bike, LOOK has completely integrated the stem into the frame design. As well as the aesthetic impact this integration allows us to apply our Direct Drive concept meaning optimising all the cockpit parameters. We achieve this by using a short head tube tapering from 1 “ at the bottom to 1 1/8” at the top and removing the spacers. With this shorter pivot, oversized bearings and a stiffer stem, the whole cockpit is stiffer and more accurate. The A-Stem permits very accurate height and length adjustments without having to add spacers.

• DCSC 2: IDEAL COMPROMISE BETWEEN STIFFNESS AND FLEXIBILITY

The 675 is designed in a very sporting spirit whilst being comfortable. The geometry takes this double objective into account and, for example, adopts a fairly high head tube to favour comfortable positions. The fork dampens vibrations, the bases and stays adopt a carbon composition and a shape ensuring a 25 % difference in lateral and vertical stiffness. This is the second-generation DCSC (Dual Comfort and Stifness Concept) concept. This concept is based on flattening the tube sections without reducing their diameter. The lateral rigidity is improved, also improving the vertical flexibility.

• STANDARD 86.5 MM PRESS FIT BOTTOM BRACKET

The 675 adopts the Press Fit standard: the bearings are integrated into the frame for better finishes, which also protects them from contamination. The Press Fit standard seals the bearings better because they are inserted into polyamide cups that are than pressed into the frame. Consequently fitting the bottom bracket is eased and its durability increased. The other advantage is that the frame is wider at the crankset because it includes the bearings. As a result the lateral stiffness increases, guaranteeing better transmission of pedalling forces.

• DI2 AND EPS COMPATIBLE INTEGRATED CABLE

The 675 has integrated cable passages in the down tube and in the right base and removable cable stops (LOOK patent). By changing these stops, mechanical groupsets can be mounted as easily as the Shimano (DI2) or Campagnolo (EPS) electric groupsets.


• CARBON FRAME AND MONOBLOC MANUFACTURE

The 675 is the latest born LOOK road frame. It benefits from a completely new manufacturing process: the 3 most highly loaded frame zones are first draped on mandrels before being placed inside the mould with the rest of the frame for moulding. This technology permits a large gain in stiffness and a stronger frame.

• INTEGRATED A-STEM STEM & DIRECT DRIVE CONCEPT

For the first time on a road bike, LOOK has completely integrated the stem into the frame design. As well as the aesthetic impact this integration allows us to apply our Direct Drive concept meaning optimising all the cockpit parameters. We achieve this by using a short head tube tapering from 1 “ at the bottom to 1 1/8” at the top and removing the spacers. With this shorter pivot, oversized bearings and a stiffer stem, the whole cockpit is stiffer and more accurate. The A-Stem permits very accurate height and length adjustments without having to add spacers.

• DCSC 2: IDEAL COMPROMISE BETWEEN STIFFNESS AND FLEXIBILITY

The 675 is designed in a very sporting spirit whilst being comfortable. The geometry takes this double objective into account and, for example, adopts a fairly high head tube to favour comfortable positions. The fork dampens vibrations, the bases and stays adopt a carbon composition and a shape ensuring a 25 % difference in lateral and vertical stiffness. This is the second-generation DCSC (Dual Comfort and Stifness Concept) concept. This concept is based on flattening the tube sections without reducing their diameter. The lateral rigidity is improved, also improving the vertical flexibility.

• STANDARD 86.5 MM PRESS FIT BOTTOM BRACKET

The 675 adopts the Press Fit standard: the bearings are integrated into the frame for better finishes, which also protects them from contamination. The Press Fit standard seals the bearings better because they are inserted into polyamide cups that are than pressed into the frame. Consequently fitting the bottom bracket is eased and its durability increased. The other advantage is that the frame is wider at the crankset because it includes the bearings. As a result the lateral stiffness increases, guaranteeing better transmission of pedalling forces.

• DI2 AND EPS COMPATIBLE INTEGRATED CABLE

The 675 has integrated cable passages in the down tube and in the right base and removable cable stops (LOOK patent). By changing these stops, mechanical groupsets can be mounted as easily as the Shimano (DI2) or Campagnolo (EPS) electric groupsets.

The must have Look Blade pedals are available!

A carbon compressed blade replaces the traditional retention spring. More secure and positive cleat entry/release. The largest pedaling surface on the market for optimal power transmission. Lightweight: Less than 95g (TI axle model) / 115 (CrMo axle model)

The Look Max pedals are in and ready to start off the new riding season!
New 12% larger cleat platform area—superior power transmission from your foot to the pedal. Stainless steel platform also creates a more stable area for the cleat apply power. Injected carbon fiber body, three bearings—double sealed oversized steel axle
The must have Look Blade pedals are available!

A carbon compressed blade replaces the traditional retention spring. More secure and positive cleat entry/release. The largest pedaling surface on the market for optimal power transmission. Lightweight: Less than 95g (TI axle model) / 115 (CrMo axle model)

The Look Max pedals are in and ready to start off the new riding season!
New 12% larger cleat platform area—superior power transmission from your foot to the pedal. Stainless steel platform also creates a more stable area for the cleat apply power. Injected carbon fiber body, three bearings—double sealed oversized steel axle