Park Tool’s IR-1.2 Internal Cable Routing Kit speeds the internal frame routing of electric wires, shift cable/housing, brake cable/housing, and hydraulic tubing on carbon fiber, titanium, and aluminum frames. This kit includes four plastic coated 250cm cables with attached magnets and unique fittings plus an external guide magnet to speed operation. Newly updated, the IR-1.2 includes a dedicated E-tube Di2 cable connector that easily pulls through a 6mm frame hole. Opposite polarity magnets on the cables seek and attach inside frame tubes making it easy to route through frame entrances and exits. The IR-1.2 works with any size frame including tandems.
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I found that this kit lacked the most useful tool I needed to address my internal cable routing problem. A piece of cable liner is a must.
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Q & A with home mechanic Tommy Tuite.