We now have 6-inch (152mm+) long bottom bracket spindles in stock. Measuring at 3/4″ (19.05mm) in diameter with the tested-and-proven 48-spline design, these shafts are basically compatible with any and all crank arms that follow the same standard, including the original and still popular Profile Racing cranks.
Coming about 1/2″ longer than regular BMX ones, this spindle is a perfect match for street/dirt MTBs, namely our very own Tanatos. As long as there is optimal engineering, 26ers always come with a wider chain line than BMX, requiring longer BB spindles to accommodate BMX-style 3-piece cranksets. If you look at the several choices of MTB-specific chromoly cranks out there, the only fundamental difference from the 20″ counterpart is the spindle length.
Now, the problem with MTB-specific 3-piece cranksets is availability, owing to smaller market size. That’s why we are making at least the spindle available, so that you can make use of those good ol’ 3/4″ BMX cranks lying around in any household.
Historically, NSP has not really been a huge fan of the 48-spline. There have been too many name brand 48’s that slip in and out easily when serviced, costing you the rotational looseness when ridden. This spindle, however, came with a warning from the factory: “installation can be a bit ch as you have to press it in.” That tight tolerance setting, so far, has felt great during installation and riding.
- BB spindle for 3-piece chromoly cranks
- Comes with sleeve, bolts, washers, etc
- Diameter: 3/4″ (19.05mm)
- Engagement standard: 48-spline
- Length: 6″ (152mm+)
- Recommended chain line: 45-52mm (reference value)
Retail price (w/o sales tax): 4,800 JPY