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Shimano Dura Ace 7900 Brake Caliper Set
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Top of the range dual-pivot calliper brake with quick linear response, increased rigidity, and improved braking power.
Enhanced brake arch proportions give a quicker linear response and increased power. Must be used in conjunction with ST7900 STI or BLTT79 aero levers for correct leverage ratio.
Rim brakes for bikes use the sidewall of the rim to reduce speed, this is done by a pad on either side applying friction against the rim, which reduces your momentum. Road brake callipers have been redesigned over the years and now use a system called 'dual pivot' which means the brake arms pivot off centre to apply a higher amount of pressure on the rim to increase your stopping power. Most manufacturers use dual pivot callipers on the front and rear, but some Campagnolo brakes use a traditional single pivot on the rear to 'balance' the braking power, the logic behind this is that as you brake your weight shifts on to the front of the bike and as much as 75% of the braking force is applied to the front.
Shimano are the makers of the world's most well known cycle component brand. Established in 1921 when the first cycle freewheel was forged. Shimano produce drivetrains, wheels, pedals, shoes, cycling clothing and pretty much every Shimano cycle accessory you can think of! Famous for their top end products ridden by the pro's, Dura-Ace and XTR, which cover both road and MTB's. At Shimano, they're doing everything they can to respond to heightened environmental concerns. Shimano are proud to be a producer of bicycle components that help people to enjoy outdoor sports and interact with nature through healthy non-polluting activities. In their 87 plus years of existence Shimano have accumulated a wealth of technology and product development and expertise that serves as the driving force behind their continually evolving product line.
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The dual pivot callipers have a modified arch which, Shimano say, gives you a more linear response. Possibly - although you'd have to run them alongside the old model and concentrate really hard to notice much difference there. More significant is the brake block compound that provides significantly stronger power in both wet and dry conditions with a single trigger finger, giving you the confidence to ride faster into bends and brake later. Durability is said to be much greater too - although we didn't have them long enough to comment on that - and the weight per pair has dropped by 30g.
Already some of the best in the business, the anchors have taken a definite step forward in all-weather performance
A new leverage ratio from the levers means these brakes are more or less only compatible with matching 7900 series levers, although any lever that can pull a cable will be able to operate them to some degree.
Cold-forged arms, dual pivots for both the front and the rear brakes, titanium spring tension screws for centring and new compound brake pads all add up to make one of the most impressive stoppers available.
When partnered with aluminium rims and the standard pads they give a linear and predictable action requiring only light pressure to slow down, and they are easy to modulate when riding on the drops where a little more finesse is needed.
Big on power but very easy to control too - truly excellent
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