Carbon parts are extremely sensitive to clamping forces. That super-fancy, ultra-light thin-walled seatpost you just bought will get crushed like a cardboard box if you put too much torque on the clamp bolt. Therefore, you need to adhere to the manufacturers torque specs on all carbon parts. Because of that, there are those of us who would give up the ghost before letting someone else work on our bike. Thus, Shimano introduced the PRO Torque Wrench. With 3,4,5, and 6mm hex heads and T25, and T30 Torx heads, you will be hard pressed to find a better, more capable torque wrench for your bicycle. Adjustable from 0- 15 Nm in 0.4Nm increments, the PRO Torque wrench will guarantee your stem, bars, seatpost, and whatever else you feel like torquing are tightened to manufacturers specs.
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