User manual DAHON DAHON 2010

[. . . ] 15. Wheel Rear Derailleur Chain Crank Set Pedal Seat Post Saddle Bolts for Bottle Cage Frame Head Set Handlepost Handlebars Brake Lever Fork Brakes NOTE: This manual is not intended as a comprehensive use, service, repair or maintenance manual. Please see your dealer for all service, repairs or maintenance. 2 Contents First . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Bike Fit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Safety First . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 How an Internal Gear Hub Drive Train Works . . . . . . . . . . . . . . . . . . . . . . . . . 11 Shifting Internal Hub Gears . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Disc brakes are quite resistant to weather and provide very strong stopping power on steep hills or on wet terrain and are well suited for heavy riders. Maximum braking force for each wheel occurs at the point just before the wheel "locks up" (stops rotating) and starts to skid. Once the tire skids, you actually lose most of your stopping force and completely lose directional control. Brake Controls and Features It's very important to learn and remember which brake lever controls what brake. Your bike will come already set and adjusted so that the right brake lever controls the rear brake. Make 9 Shifting Gears Your multi-speed bicycle will have a derailleur drive train, an internal gear hub drive train or, in some special cases, a combination of the two. How a Derailleur Drive Train Works If your bicycle has a derailleur drive train, the gear-changing mechanism will have: » A rear cassette or freewheel sprocket cluster. » A drive chain. easier on a hill, make a downshift in one of two ways: shift the chain down (the gear "steps" to a smaller gear at the front) or shift the chain up (the gear "steps" to a larger gear at the rear. ) So, at the rear gear cluster, what is called a downshift actually moves the chain up to a larger gear. The way to keep things straight is to remember that shifting the chain in towards the centerline of the bike is for accelerating and climbing and is called a downshift. Moving the chain out or away from the centerline of the bike is for speed and is called an upshift. Whether upshifting or downshifting, the bicycle derailleur system design requires that the drive chain be moving forward and be under at least some tension. A derailleur will shift only if you are pedaling forward. travel of the rear derailleur. Tightening the rear derailleur high gear adjustment screw keeps the chain from shifting off the small (high) gear that is on the rear axle. Tightening the rear derailleur low gear adjustment screw keeps the chain from shifting off the large (low) gear into the rear wheel. Moving the chain from a smaller sprocket of the gear cluster to a larger sprocket results in a downshift. Moving the chain from the smaller sprocket on the chain rings to a larger sprocket results in what is called an "upshift. " In order for the derailleur to move the chain from one sprocket to another, the rider must be pedaling forward. Shifting the Front Derailleur The front derailleur, which is controlled by the left shifter, shifts the chain between the larger and smaller chain rings. Shifting the chain onto a smaller chain ring makes pedaling easier (a downshift). There are 2 (two) adjustment screws on the front derailleur: one is to limit the travel of the front derailleur so that the chain can be shifted upwards towards the larger, higher or harder to pedal gears but will not allow the chain to "overshift. " The other screw limits the travel of the front derailleur towards the smaller or easier-to-pedal chainwheel. By limiting travel, it prevents the chain from "undershifting" and keeps the chain from falling off the chainwheel onto the frame. Shifting the Rear Derailleur The right shifter controls the rear derailleur. Shifting Gears There are several different types and styles of shifting controls: levers, twist grips, triggers, combination shift/brake controls and push buttons. Ask your dealer to explain the type of shifting controls that are on your bike, and to show you how they work. A downshift is a shift to a "lower" or "slower" gear, one that is easier to pedal. An upshift is a shift to a "higher" or "faster", harder to pedal gear. To select a gear that will make pedaling The function of the rear derailleur is to move the drive chain from one gear sprocket to another. The smaller sprockets on the rear wheel gear cluster produce higher gear ratios. [. . . ] WARNING: Like any mechanical device, a bicycle and its components are subject to wear and stress. Different materials and mechanisms wear or fatigue from stress at different rates and have different life cycles. If a component's life cycle is exceeded, the component can suddenly and catastrophically fail, causing serious injury or death to the rider. Scratch- es, cracks, fraying and discoloration are signs of stress-caused fatigue and indicate that a part is at the end of its useful life and needs to be replaced. [. . . ]