- Rotor 3D Plus Double Chainset (BB30) with Q-Rings
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zoom Rotor 3D Plus Double Chainset (BB30) with Q-Rings
Rotor 3D Plus Double Chainset (BB30) with Q-Rings
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|Black||170mm - 53 / 39T|
|Black||175mm - 53 / 39T|
Rotor 3D cranks are the first cranks to have been designed with the input of a pro cycling team - together with Rotor engineers, the 3D crank was born. The result is an extremely stiff chainset, but lightweight also.
Top Features of the Rotor 3D Plus Double Chainset (BB30) with Q-Rings
- Innovations include a new High precision lockring for BB pre load and adjustment 3D+ is 100% compatible with:
- Cervelo BBRight specification
- BB30 frames 68mm width
- Classic threaded frames (using the new Rotor BSA threaded 30mm bearing cups)
- All 130/110 BCD Q-rings and round rings
- Developed with the input of the Cervelo Test Team in 2009
|Bottom Bracket Type:||BB30|
The oversize 30mm axle provides massive lateral and torsional stiffness, combined with weight reduction (470grms).
Utilising a special manufacturing process, named the "Trinity Drilling System," an extruded aluminium bar is intricately CNC machined with three drilled holes through the length of the crank. The result is a unique triple hollow crank arm that enables Rotor's engineers to remove the excess aluminium in the core while still maintaining the structural strength of the crank.
No attention to detail has been missed by Rotor, even the graphic design on the 3D Cranks is unique with their impressive laser graphics. 3D crank uses a new variant of DTT Evo technology in the left crank.
3D crank has evolved the Agilis Evo design in fixing the axle to the right crank. The left crank is now used to assemble or disassemble the crankset with a low torque axle end bolt and the new DTT Evo clamping bolt. The opposite paired bolt system (the most common in the market) is no longer needed.
Instead of the opposite paired bolts, an oversized DTT Evo bolt distributes the load forces along the thread. 3D cranks installation is completely conventional but with improvements in both the efficiency and stiffness of the axle-crank interface. See the attached picture.
In order to avoid overtightening, Rotor 3D cranks include a replaceable threaded bushing between the crank and the bolt. In case of bolt failure due to overtightening, the crank is not affected and is easily repaired.
Your chainset must fit onto your bottom bracket! There are currently four chainset/bottom bracket interfaces that you're likely to come across. If your bottom bracket is made by Shimano and it has splines, then you need an Octalink chainset. If your b/b is NOT made by Shimano and it has splines, it's almost certainly ISIS. There are a very few non-Shimano chainsets with Shimano Octalink interfaces so, to be sure, count the splines - ISIS has 9, Octalink has (surprise, surprise) 8. No matter which brand of b/b you have, if it has a square interface, it will require a traditional square taper chainset. If you have one of the new Hollowtech II systems, you will need to choose the exact chainset that matches your bottom bracket. Most MTB chainsets are now 9-speed compatible but these will work with an 8-speed system.
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