Enduro 3903 LLU<span> </span>bearingsthese BB's are sure to stand up to the abuse of daily street use. Onour test BB the spindle weighed 152 grams and the whole setup came inat 226 grams. Use the bolts from your existing cranks, or <a href="http://www.benscycle.net/index.php?main_page=product_info&cPath=188_247_677&products_id=1479">these</a>if you lost yours. No proprietary tools needed, <a href="http://www.benscycle.net/index.php?main_page=product_info&cPath=270_276&products_id=766">ParkBBT-22</a> and <a href="http://www.benscycle.net/index.php?main_page=product_info&cPath=188_234&products_id=2598">any</a><span> </span><a href="http://www.benscycle.net/index.php?main_page=product_info&cPath=188_234&products_id=903">lockring</a><span> </span><a href="http://www.benscycle.net/index.php?main_page=product_info&cPath=188_234&products_id=902">tool</a>is all you need to install this BB.