Let's briefly review what an eyelet's purpose is first-most it is to displace the weight on the spoke when it is in the vertical position, at that point in the wheel revolution the majority of the weight the wheel supports "hangs" from the rim on the single spoke. The 231 uses a one-piece, single wall stainless steel eyelet. We've found the 231 joint to be consistently tight, with smooth sidewall contact and lacking gaps. This process uses the channels as a tight fitting sleeve, and the rim contour, for the rod fasten and the rim together. The rim ends are joined using two 4.5mm diameter, tapered end, curved aluminum rod that are pressed into the channels of both rim ends. After extrusion the rim stock is Clear anodized leaving it a "buff" Silver SBP color, then rolled into the rim's hoop shape. The added weight of the thin cross-tie wall is negligible, and comprises a very small percent of the total rim weight. The two channels running the circumference of the rim give it a great deal of rigidity, and in many cases that alone would be structure enough, but add to that the cross-tie wall joining the channels and give the rim an incredible amount of lateral torsion stability. A thin cross-tie wall joins the two channels together. Though it's a double wall extrusion, it also has round channels where the sidewall and spoke bed walls join. The 231 is a Box shaped rim with flat sidewalls, that's unusual in design. Although the 231 is produced in both 700c and 26" diameters, we sell it only in the 26" size. 231 is one of the narrowest of Mavic mountain bike rims, easily one of the most popular rims we sell. Mavic Mountain Bike Rims Mavic 26" Mountain Bike clincher rims MAVIC PSP 231
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