BSA 30 Bottom Bracket flat bar- pair We equipped Sirrus X 4

We equipped Sirrus X 4

6% Elastane

and extended our lead

Air positive chamber with IVA (Incremental Volume Adjust) selfcontained volume spacer system

BSA 30 Bottom Bracket flat bar- pair We equipped Sirrus X 4The Wheels Manufacturing BSA 30 bottom bracket threaded to 30mm is their solution to running a 30mm spindle crankset in a BSA (English) threaded frame. This bottom bracket features high quality aluminum cups and fully serviceable bearings. Enduro ABEC 3 sealed bearings are replaceable Grade 10 chromium steel balls, 52100 High Carbon Chromium Alloy Races provide smooth crank rotation Machined aluminum cups with durable anodized finish