توپی تنه شیمانو Shimano Bottom Bracket 105 Hollowtech II

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فروشگاه آنلاین آسمان دوچرخ

بررسی مقایسه انتخاب و خرید سریع آنلاین در فروشگاه اینترنتی آسمان دوچرخ

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توپی تنه شیمانو Shimano Bottom Bracket 105 Hollowtech II

توپی تنه شیمانو Shimano Bottom Bracket 105 Hollowtech II

The following makes will be discussed:

• Shimano® Hollowtech II
• Race Face® X-type
• FSA® MegaExo
• Truvativ® and SRAM® Giga X Pipe
• Campagnolo Ultra-Torque

These systems integrate the bottom bracket bearings, crank and spindle. The spindle is a permanent part of the arm. The opposite arm slides onto the spindle splines and is then secured. While conventional bottom bracket system have the bearing inside the bottom bracket shell, these types of cranksets have external bearings that sit outboard of the shell face. Example of these systems are Shimano® Hollowtech II, Race Face® X-type Crankset and FSA® MegaeXo, and Truvativ® Giga X Pipe.

The external crankset bearing systems integrate the bearings, cranks and spindle. The bearings sit outside the face of the bottom bracket shell face. The spindle is a permanent part of one arm. The arm slides onto splines and is then secured. These systems use a cartridge bearing.

The bearings cups of these systems thread into the bottom bracket, and press against the shell face. The bearings then sit outside of the shell. It is important that the left and right shell surfaces are adequately machined square to the threads and one another. Miss aligned shell faces can cause the bearing cups to twist as the seat into the bike.

Prepare threads of shell with either grease, anti-seize, or a mild thread locker. For more on thread preparation, see Basic Thread Concepts. Install correct amount of spacers on cup marked with “R” (left-threaded cup) and install dust sleeve on cup. Thread cup counter-clockwise into right side (drive side) of bike. Use care not to cross thread cup. Tighten fully, approximately 305 to 435 inch pounds. When using the BBT-9, and grabbing the tool about 6-inches (15 cm) from the cup, apply about 60 pounds (27 kilograms) of effort to tighten the cups.