System integrationTOUR gives workshop tips

Jens Klötzer

 · 27.11.2022

System integration: TOUR gives workshop tipsPhoto: Kerstin Leicht
System integration on handlebar-stem units takes assembly and maintenance to a new level. Here are some valuable workshop tips on this topic.

Before it starts

  • Read the operating instructions! All the necessary parts and their sequence are documented here. Even professionals will save a lot of time if they follow the specified steps.
  • Take photos! Often helps with assembly problems.
  • If the handlebars are not to be replaced, leave the brake levers and cables fitted to the handlebars.
  • When replacing the handlebars, it is advisable to first pre-assemble the grips with cables, as the cable length on the lever must fit exactly to the millimetre.

System integration - the work on integrated handlebar-stem units cannot be done alonePhoto: Kerstin LeichtSystem integration - the work on integrated handlebar-stem units cannot be done alone

Expansion

In the example, we show the disassembly and reassembly of the front on a fully integrated road bike. The aim is to remove the fork in order to shorten the steerer tube*

Brake line removalPhoto: Kerstin Leicht

1. The brake hose must be cut at the lower end because the end of the hose on the brake body can only be used once. In order to have as much reserve as possible, cut the line at the end piece with the side cutter and lever the end piece out of the line.


Brake line trimmedPhoto: Kerstin Leicht

2. Then make a clean cut with a special cutter for brake lines, removing as little material as possible.

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For semi-integrated handlebars and stems or other work, steps may be omitted or the sequence may change.

Expansion

Drain brake fluidPhoto: Kerstin Leicht

3. Drain the brake. To do this, open the bleed screw on the lever and draw the hydraulic fluid out of the line using a syringe. Carefully remove any swarf produced during cutting and, if necessary, flush it out of the line by actuating the brake lever. Otherwise they may impair the function of the brake.



Stem extensionPhoto: Kerstin Leicht

4. Loosen the headset cap and stem. Carefully pull the stem upwards while holding the fork from below. First secure the loose handlebars to the frame with a strap so that your hands are free again.


Remove spacerPhoto: Kerstin Leicht

5. Remove the spacers and all rings or caps if they are in two parts. If the spacers are one-piece or not open, all cables must be removed from the frame and fork if the handlebar height is to be changed!


Wire in brake linePhoto: Kerstin Leicht

6. Push a wire (approx. 1 millimetre in diameter) through the entire brake line from below. Carefully push the cable with the wire upwards through the cable duct of the fork; once the end is visible, pull the cable off the wire. The fork can now be pulled out downwards. The cable is often fixed to the fork steerer tube with adhesive tape, which is not visible in this condition. If necessary, pull the shift cables or the rear brake cable through the frame in the same way.


System integration ExpansionPhoto: Kerstin Leicht

7. Carefully pull out the fork downwards.


System integration - Assembly

System integration AssemblyPhoto: Kerstin Leicht

1. Take particular care to ensure that all parts are fitted in the correct order and installation direction. Do not forget anything! A mistake can be made quickly and can ruin hours of work.


System integration AssemblyPhoto: Kerstin Leicht

2. A helper is useful when installing the fork. Slide the fork into the head tube from below and at the same time slide the cables and sleeves already attached to the handlebars over the wires.


System integration AssemblyPhoto: Kerstin Leicht

3. Good sorting is important now! Which cable runs where? Is nothing crossing? Check in the operating instructions and with photos of the original state! Fix the cables in position with guide rings and spacers, use adhesive tape if necessary.


System integration AssemblyPhoto: Kerstin Leicht

4. Bring the fork and stem together while simultaneously pushing the cables from above until the ends emerge from the openings. If necessary, try several times - the cable must find its way by pushing and over the wire. Pulling from below is not possible! Fit the remaining small parts (covers) and fix the stem to the steerer tube, pre-tension with the cap. Now check that the handlebars turn freely and that nothing catches. Reconnect and bleed the brakes, connect the shift cable to the components.


Jens Klötzer is a qualified industrial engineer and TOUR's expert for components of all kinds: brakes, gears, wheels and tyres - Jens puts everything through its paces. He collects historic racing bikes and owns both a modern time trial bike and a titanium gravel touring bike. When travelling, he likes to explore unknown roads in Eastern Europe - on wide but fast tyres.

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