Cranks on your BMX bike are what you get up to your top speed and the Sinz cranks help you get there in style. With all sizes from 135 to 175, laser etched logos, 110mm bolt pattern and dust covers; you can’t go wrong with these. Available in either tradition square or the new ISIS pattern bottom bracket, we have all your cranks needs. Model #Size Weight SEC-10 135 mm 14.7 oz. SEC-11 140 mm 15 oz SEC-12 145 mm 15.4 oz. SEC-13 150 mm 15.9 oz. SEC-14 155 mm 16.1 SEC-15 160 mm 16.7 oz. SEC-16 165 mm 17.2 oz. SEC-17 170 mm 18 oz. SEC-18 175 mm 18.5 oz.