The Philcentric is an Outboard Bottom Bracket that gives you eccentricity without using horizontal dropouts, an eccentric hub, or chain tensioners. You may be required to use a half link. If you need to order replacement dust cover please note that the Philcentric uses our medium dust covers. Please note: All Philcentric Outboard Bottom Bracket cups require the Phil Wood Philcentric installation tool and alignment gage (available separately). It is recommended that you go to a bicycle shop familiar with the installation and adjustment of this part. SPECIFICATIONS Cup material Stainless Steel Cup cover material 7075 Aluminum Dust cover material ABS plastic (Shimano), 7075 Aluminum (SRAM/GXP Adaptor) Spacing 68 mm - 100 mm Bearing availability 6805 (Standard), 6805 (Carbonyte) OBB weight 207 grams Rider and bike weight limit 280 lbs / 127 kgs Materials All of our manufactured items are machined out of US-produced materials. INSTRUCTIONS Philcentric Bottom Bracket Cup Installation (pdf)