The Speedline 2pc Expert Race Cranks are the easiest to install and solve the age old problem of the square taper spindles. With it's cold forged and CNC'd 6066 T-6 aluminum you get a super strong and super light arm , mated to an oversized 24mm PRO style Heat Treated 4130 Cro-mo Spindle that is lighter and stronger than the old school style 1/2" square tapered spindle. Even if you spend the big $$$ and get a titanium one.
With its removable 4 bolt spider you get to use all the Pro style chain rings so no more worry about getting all new ones as they grow, now when you invest in gears, you can be confident that they will last with you as your rider grows. And if you were to ever damage your spider, it is removable so you can replace the spider rather than replace the entire crankset.
The Speedline 2pc Expert Race Cranks come with an Ultra High Quality Sealed Bearing Outboard Bearing Euro Bottom Bracket to fit the 24mm Spindle. It will fit the Std. Euro BB shell on Most Mini, Junior, Expert and Pro Frames on the market.