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Screwdriver tricks: Gears and brakes

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· 29.02.2008

Screwdriver tricks: gears and brakes

Photo: Daniel Simon

These parts must function optimally. The best tricks for Campagnolo, Shimano and SRAM

Degree of difficulty: for talented hobby mechanics

Tool: Hexagon socket, Phillips screwdriver and open-end spanner

TIPS:

- Regularly apply a drop (not a jet!) of oil to the joints of the rear derailleur, front derailleur and brakes after washing and drying to maintain smooth operation.

- Check the screw connections of the brakes, derailleurs and front derailleur as well as the other screws on the racing bike with a torque spanner according to the manufacturer's specifications after the first 100 to 300 kilometres of riding and then every 2000 kilometres.

Campagnolo

1. the most important setting is the end stop inwards. Turn the crank slowly and push the rear derailleur inwards by hand. Turn the rear Phillips head screw to the right for more travel. The front screw forms the outward limit stop.

1. the most important setting is the end stop inwards. Turn the crank slowly and push the rear derailleur inwards by hand. Turn the rear Phillips head screw to the right for more travel. The front screw forms the outward limit stop.

2 The guide roller touches the tooth tips in some positions. Turning the screw at the bottom can prevent this. This does not always work because Campa's rear derailleur does not harmonise with derailleur hangers that are far back.

3. adjust the spring preload with a 2 mm hexagon socket on the brake arm on the pull side. With longer cables, this absorbs the higher friction and the brake body then reliably pulls the cable back.

4. roughly pre-adjust the brake body with a 13 mm open-end spanner. Use the 2 mm hexagon socket to synchronise the pads via the small screw on the opposite side of the cable. Ideal distance: 1 to 2 millimetres in each case.

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Shimano

1. the inner end stop is limited with the rear lower Phillips screw. In principle, this is the same as with Campagnolo and Sram, but has the advantage that you can look directly from behind at the position of the guide roller to the sprocket during adjustment.

1. the inner end stop is limited with the rear lower Phillips screw. In principle, this is the same as with Campagnolo and Sram, but has the advantage that you can look directly from behind at the position of the guide roller to the sprocket during adjustment.

2. shift to the lowest gear and turn the crank. Screw in the Phillips screw, which is supported on the dropout, until the tooth tips of the guide roller no longer touch those of the sprocket.

3. the inner Phillips screw on the front derailleur forms the inner limit stop for all manufacturers. Shift to the lowest gear. Adjust the screw so that the chain no longer touches the guide plate of the front derailleur. Ideal distance: 0.5 millimetres or less.

4. roughly centre the brake by hand. The 3 mm hexagon socket screw at the top of the brake body is used for fine adjustment. With Dura-Ace brakes, you can also increase the spring preload at the side using a 2 mm hexagon socket.

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SRAM

1. adjust the inner end stop on the slightly large-looking screw at the top or further in. This aluminium screw fits a 2.5 mm hexagon socket precisely.

1. adjust the inner end stop on the slightly large-looking screw at the top or further in. This aluminium screw fits a 2.5 mm hexagon socket precisely.

2. use the 2.5 mm hexagon socket screw at the rear to adjust the distance between the guide roller and the tooth tips. Due to the different pivot point of the roller cage, the distance (6 millimetres) must be greater than with Campa and Shimano.

3. for Sram and Shimano, there should be 1 to 3 mm between the large blade and the outer front derailleur guide plate, which should be parallel to the chainrings. Campagnolo: 1 to 2 mm, the inner plate is parallel to the chainrings.

4. align the brake body with a 13 mm open-end spanner and fine-adjust the brake using the 3 mm hexagon socket screw at the top. The spring preload can be increased at the side using the 2 mm hexagon socket screw.

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SRAM Red Doubletap

1. the brake cable can be routed along the inside and outside of the handlebars on the Sram Red levers. As with Campagnolo, this expands the choice of suitable handlebars.

1. the brake cable can be routed along the inside and outside of the handlebars on the Sram Red levers. As with Campagnolo, this expands the choice of suitable handlebars.

2. the reach of the shift and brake levers can be adjusted. Pull the rubber grip backwards and fully relax the shift lever. Push the shift lever inwards again and pull it slightly towards the handlebars. Turn the adjusting element with a small hole.

3. push the element inwards with a pointed object and select one of the six positions that swivel the lever closer to the handlebars.

4. then move the brake lever closer to the handlebars using a 3 mm hexagon socket (turn to the right). The lever should just touch the gear lever. Check whether the brake lever still has a short free travel until the pressure point of the brake sets in. Slacken the brake cable slightly.

4 Images

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