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This bottom bracket is intended for applications demanding light weight
MRCB00 (Low)
and 48 spoke hole configurations
For the Pro model of our road hub we replace the stainless steel axle and end caps found in our Classic hub with anodized US-produced 7075 aluminum parts
Track Hub Replacement Lockrings Model:Pro This bottom bracket is intendedSPECIFICATIONS Lockring material Stainless steel (Classic), 7075 Aluminum (Pro) Lockring thread 1. 32" x 24 tpi (LH Thread) Lockring weight Classic (20. 8 grams), Pro (58 grams) Rider and bike weight limit 280 lbs 127 kgs (Classic), 190 lbs 86 kgs (Pro) Materials All of our manufactured items are machined out of US produced materials. Please note: Our Pro 7075 aluminum lockring should only be used for indoor track racing. INSTRUCTIONS Rear Track Hub