Assessments - 4, GPA: 4.3
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Using an advanced structural design, the Race XXX Lite ATB crankset achieves an incredibly optimized strength-toweight ratio. The ultimate drivetrain upgrade for your high performance ATB bike. The Bontrager Race XXX Lite ATB crankset is loaded with features: • True hollow-molded carbon structure keeps the weight to an absolute minimum. • Splined ISIS bottom bracket assembly redefines smooth and efficient pedaling. Please read this instruction manual Figure 1- Bontrager Reace XXX Lite carbon fiber crankset Read this ManuaL befORe yOu Ride thoroughly before using your new crankset; it contains important safety and maintenance information. If you do not understand the information in this manual, or you have a question about your crankset that this manual does not cover, consult your Bontrager dealer. If you have a question or problem that your Bontrager dealer can’t handle, contact us at: Bontrager Components 920.478.4678 Attn: Customer Service 801 W. Madison Street Waterloo, Wisconsin 53594 contents Introduction ....................................................................................................2 Inspecting the crankset and bottom bracket..................................................2 Adjusting the crankset and bottom bracket...................................................2 Lubricating the crankset and bottom bracket................................................2 Check the carbon fiber parts for fatigue or impact damage. .........................3 Installation Pedal removal and installation ...................................................................4 Changing crank length ..............................................................................4 Crank arm removal and installation ..........................................................5 Bottom bracket removal and installation...................................................5 Limited Warranty ............................................................................................6 © Copyright Trek Bicycle Corporation 2007 All rights reserved introduction The crankset- left and right crank arms and chainring(s) (Figure 1), and bottom bracket (the axle and bearings on which the crankset rotates)- allows your legs to pedal, transmitting power to the rear wheel. This section explains how to inspect, adjust, lubricate your crankset and bottom bracket, and how to check carbon fiber parts for damage. Chain Crankset Crank bolt Pedal Cassette Figure 2- Drivetrain parts inspecting the crankset and bottom bracket Once a month, clean the chainrings and inspect them for damage. If any teeth are bent or broken, have the chainring replaced by your dealer. Note that on some chainrings, a few teeth have a special shape to enhance shifting. Every 3 months inspect the crankset, check the bottom bracket adjustment, and tighten the bolts. These are maximum torque specifications: • Crank bolts: 350 lb•in (40 N•m) • Chainring bolts: 50-70 lb•in (5.7-7.9 N•m). • Bottom bracket cups: 430-610 lb•in (48.6-68.9 N•m). • Pedals: 350-380 lb•in (40.2-42.9 N•m) Turn the right pedal clockwise, but the left pedal counterclockwise (Figure 3). to check the bottom bracket bearing adjustment 1. Lift the chain from the chainrings. 2. Rotate the crank so that one of the arms is parallel to the seat tube. 3. Put one hand on the crank arm and one hand on the seat tube, and attempt to move the crank arm laterally toward and away from the seat tube. 4. Spin the cranks. If the crank feels or sounds loose, or if the motion stops abruptly or you hear a grinding noise coming from the bearings, the bearings need to be adjusted or re- greased by your dealer. adjusting the crankset and bottom bracket The Race XXX Lite crankset offers ALS (Adjustable Length System). Refer to the Installation Instructions. Adjustment of the bearings in the bottom bracket requires special tools and training. These services should only be performed by your dealer. Lubricating the crankset and bottom bracket Once a year, re-grease the bottom bracket bearings. Some bottom bracket bearings are permanently sealed and do not require yearly re-greasing. Re- greasing bearings requires special tools and training, so this should only be done by your dealer. Whenever you are installing a threaded part, apply a small amount of bicycle grease to the threads, except for aluminum chainring bolts. With aluminum chainring bolts apply a drop of Loctite 222 to the threads. Figure 3 Tightening pedals check the carbon fiber parts for fatigue or impact damage. Carefully inspect your components, including the crankset, before and after each ride for signs of impact or fatigue stress: • Dents • Cracks • Scratches • Deformation • Discoloration Even if you perform regular inspections, if you exceed the limit of strength of a given part, it may fail if overloaded. After any high force load, thoroughly inspect all the parts of your bike. High force loads include crashes, but you don't ha...