Why Direct Crank?

SRAM OMNIUMBrotures Original Rip CranksetSuch Where is the difference between the so -called direct crank and the general crank?
Here is the general crank appearance. Bottom bracket (BB) of "square taper" to attach it.
If you remove the crank and look at it from behind, it looks like this.
and
This is a direct crank. BB of the bundled "outboard".
If you remove it and look from behind, it looks like this.
With a square taper BB to attach inside the frame Outboard BB attached to the outside of the frame as the name suggests. Comparing both, the outboard is wider. The bearing part at both ends of the BB is the fulcrum when stepping on the crank Outboard BB with its position on the outside has higher rigidity, You can tell the wheels to the wheels without losing the pedaling force. Rather than supporting the two points close to the center when supporting the two rods. It is more stable to support two points near the outside. It's easy to row out and feel easy to climb This is because the power of rowing a bicycle has changed to propulsion. Other The thickness of the shaft that attaches the crank For 17mm in square taper
Direct crank is 24mm
Therefore, the rigidity is even higher and the pedaling loss is gone. moreover The shaft becomes thicker, but the inside is hollow, so the crank itself becomes lighter. In addition, by integrating the right crank and the shaft The number of parts is reduced, and there are advantages such as further weight reduction and preventing crank dropping. I wanted you to know the goodness of the direct crank, and just wrote it, but it was a belief. Please experience this ride comfort. 763 Local piste photos are being recruited at any time! ! Click here for post →brotures2009@gmail.com BROTURES YOKOHAMA TEL: 045-413-7875 Mail: Brotures2009@gmail.com 2-1 Saito-cho, Kanagawa-ku, Yokohama-shi, Kanagawa Brotures Harajuku TEL: 03-6804-3115 Mail: Brotures2011@gmail.com 4-26-31 Jingumae, Shibuya-ku, Tokyo Web shop! !Free shipping on mail order orders over 10,000 yen! ! All models with 6 months warranty! !(Limited to bicycles purchased in our shop)
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