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Box Four Forged 2pc Race Cranks
Product Description
The Box Four Race Cranks feature a 2-piece design paired with an oversized bottom bracket interface.
For durability and easy installation the 24mm spindle is pressed into the drive-side crank arm while the non-drive side crank arm features a 2 bolt pinch system for imcreased strength.
Box's unique 4 bolt 104 BCD spider features a flex-resistant ring optimum performance. These cranks feature steel pedal inserts that require pedal washers and external sealed bearing BSA bottom brackets, both are provided in the box.
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*Select bikes ship with a flat fee from 14.95€
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The length of the cranks arms from the spindle to the pedal. Any length will work on all bikes but there are a few things to consider; If you are purchasing a replacement crank for a child's BMX its best to measure what you are replacing and match accordingly, 10mm either way is acceptable.
99% of all freestyle BMX bikes now come with a standard Mid Bottom Bracket shell which makes frame compatibility easy. The only thing you need to get right is matching up the inner diameter of your BB with the spindle size on your crank. All our cranks have their spindle diameter listed in the specifications and you will need a BB to match - for instance, a 22mm Spindle will require a 22mm Mid BB.
All of our standard sprockets will fit our cranks as they are supplied with the relevant spacers and simply bolt to the crank arm using the spindle bolt.
RHD / LHD or drive-side refers to what side of your bike your drive chain is situated. The standard on BMX bikes is on the right but there are options to run your drivetrain on the left.
This refers to the relationship between the front sprocket and rear cog and determines how easy or hard it is to pedal. The standard gearing for full size Freestyle BMX bikes is 25t - 9t. However, there are some other popular combinations below. Obviously if you like it slighter harder to pedal, you can increase the size of the front sprocket - for example a 27t-9t.
