Here's the link to the official Sram DUB installation video: SRAM DUB INSTALLATION
DUB road is finally here, and BBInfinite has exactly what you need to keep your DUB road system running silent, smooth, and fast. Sram's road and MTB DUB crank systems feature a 29mm spindle. SRAM did this so that they could fit a polymer insert in a standard BB30 style bearing. These inserts eliminate the metal-on-metal contact of the spindle against the bearing races, which eliminates a major source of creaking and fretting of the spindle, which a lot of you have seen. Now we're going to go in dry with this, as we always do with these BBInfinite modules, until we get about halfway in. Always follow the instructions. Another great feature of the DUB system is the wide stance of the bearings. Sram touts this as a stiffness increase when pedaling. What excites us about this is the elimination of the cantilevering forces that are caused when spindles extend out way past the bearings, such as in a traditional 68mm bottom bracket with a modern 386Evo width crank installed. Here's that popping. Remember; you want this. These forces accelerate bearing wear and greatly contribute to creaking issues. But with DUB, that problem is solved. But what isn't solved is that two-piece bottom brackets that are sticking way out of the bike, tend to get loosened up by pedaling forces. Not a problem with BBInfinite. We're one-piece. Next, I'm going to apply a little bit of grease to the face of the bearings. This helps these to stick on there while I assemble everything. The only downside to outboard bearings is that the forces dislodge the bottom bracket cups that are pressed into each side. Not a problem of BBInfinite thanks to our one-piece design architecture. Next, just slide the polymer spacers in. Of course, you can add a bit of grease to this too to kind of make everything really come together nice and smooth.
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