Bulletproof BMX Crankarms
140, 150, 155, or 160mm

S&H in the USA
$9 for arms - $11 for cranksets
With their 110mm BCD bolt circle they are great for single rings, compact doubles or 34-44-54 triples.

140mm - Shown w/34-42 Sugino Chainrings - $105
Fashion warning!
The 140s and 160s look normal. At least once you get past the big BULLETPROOF on the arms. But since the same forging is used for 150, 155 and 160, the ends of the 150s (above) and 155s look a bit odd, with extra metal past the pedal hole.

I can remove the excess metal for $25 and the BULLETPROOF text for $15. Click Here to See

Some other options;
34 (or 36)-50 Sugino Chainrings - $117.25
34-48 Salsa Chainrings - $123.75
34-50 Salsa Chainrings - $127.00
34-48 Race Face Chainrings - $148.50 (Ramped and pinned)
36-50 Race Face Chainrings - $125 (Ramped and pinned)
     (36/50 are cheaper as they come as a set, including chainring bolts.)
Prices in clude arms rings and chainring bolts.
Add $5 if you need crank fixing bolts.
 Do not send money, based on these prices.

Due to worsening exchange rates, my parts costs can rise at any time. And, my suppliers are often out of at least some specific rings. Chainring prices vary widely, depending on brand and size.

Contact me mark@bikesmithdesign.com or 612-824-2372, for a current quote and availability.
BB spindle; They take a 107 or 110mm square bottom bracket spindle if used as a single or double and a 118 or 122mm spindle if used as a triple.
If you currently have a 115 mm, I recommend giving it a try. If it doesn't work you should be able to pick up the right one at most larger bike shops.

I can also provide bottom bracket spindles if your shop can't.

 Bolt Circle Diameter (BCD) 110mm

110mm BCD rings are available in even tooth counts from 34 to 54, plus 39 and 53.

A good application for a 34-44-54 triple would be a bike with a 20" drive wheel. Such as replacing the 170mm 39-52-63t crank setup on a Rans Rocket or Tailwind.
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